Massive Multiplayer Crossover - TV Tropes

Let's see... Fire Emblem, Yoshi's Island, Pokémon, Super Mario Bros., Donkey Kong, EarthBound, The Legend of Zelda, Star Fox, Metroid, F-Zero, Kirby, Game & Watch, and Ice Climber. All in just one game, and this game isn't even the best example from its franchise.

"So many heroes from so many dimensions! This is pretty cool!"

• A MasterCard commercial featured several food mascots (from Count Chocula to the Pillsbury Doughboy) eating dinner — with Mr. Clean doing the dishes.
• USA Network's commercials play this for laughs, having various combinations of characters from their shows (Burn Notice, Monk, Psych, others) encounter each other and make idle conversation.
• UK example: The Greatest Minds In Advertising Join Forces in a 2009 viral for Comic Relief.
• "We Are Family": A Musical Message for All uses clips from over 100 The '90s-Turn of the Millennium children's television shows^note  and have them sync with a cover of "We Are Family" by the Sledge Sisters. In other words, Generation Z nostalgia.
• The MetLife insurance company has released an ad featuring characters from Peanuts, Looney Tunes, Hanna-Barbera, Filmation, and many other animation studios.
• One Krystal ad had lawyer-friendly parodies of the Wendy's girl, Ronald McDonald, and The Burger King passing up No Celebrities Were Harmed / Bland-Name Product versions of their respective restaurants to get some food from Krystal.
• The Origin promo for Toonami Asia seems to imply this, as we're shown characters from Justice League Unlimited, Ben 10, and Generator Rex all existing in the same universe, before the end of the Age of Superheroes happened.
• Aardman Animations made a Google+ Hangout commercial for Christmas 2012 that featured Wallace & Gromit making a conference call with Ginger, Captain Cuddlepuss and Trixie, the robins, Shaun's flock, and Piella and Fluffles.
• A 2019 ad for Walmart's pickup service featured a plethora of pop culture cars from the Batmobile, Ecto 1, K*I*T*T* from Knight Rider, a Ford Explorer full of raptors, Lightning McQueen, the Mutts Cutz van, the Griswold family station wagon, the Mystery Machine, Bumblebee, and many, many more.
  • It was followed up in 2020 with "Famous Visitors'', featuring various famous spacefaring characters, including the U.S.S. Enterprise, Marvin the Martian, Benny the Spaceman, the Mars Attacks! Martians, the Milano with Teen Groot, Frank the Pug and the Worms, the aliens from Arrival, Flash Gordon, Buzz Lightyear, Bill S. Preston, Esquire, and, having gotten very lost, R2-D2 and C-3P0.
• To hype up the change over to a brand new streaming service style, Paramount+, ahead of its rebrand from CBS All Access, began a series of commercials with the stars from various series — live-action, animated, puppet or otherwise — climbing the Paramount Mountain and the various hijinx they get into, narrated, and later revealed to be all planned by Sir Patrick Stewart.
• It's Thinking: The ads depict the various first/second-party characters and some third-party characters interacting with each other inside a Dreamcast.
• Defeat the Dark Side was an advertising campaign that brought Colonel Sanders, the Taco Bell Chihuahua, and a Pizza Hut employee named Alexis into the world of Star Wars. In order to promote The Phantom Menace, it featured all three mascots fighting in the Battle of Naboo against the Dark Side.
• Instacart's Super Bowl 59 commercial, "We're Here", involves Cheetos' Chester Cheetah, the Pillsbury Doughboy, the Jolly Green Giant, Mr. Clean, the Kool-Aid Man, the Energizer Bunny, Old Spice's "The Man Your Man Could Smell Like", and even Mountain Dew's infamous "Puppy Monkey Baby" and the Heinz wiener dog stampede from their respective companies' previous Super Bowl 50 commercials, all making their way toward someone's house before turning into their respective products, all to personify an Instacart order.

• Several of the early magical girls, such as "Creamy Mami, the Magic Angel" had crossovers with multiple other magical girls in some of their OVAS.
• The Giant Robo OVA series featured characters taken from several other series Misuteru Yokoyama — the original creator of Giant Robo/Johnny Sokko and His Flying Robot — had written. This included adaptations Romance of the Three Kingdoms and The Water Margins, which led to many main and secondary characters in ancient Chinese clothing coexisting with people in three-piece suits 20 Minutes into the Future. It also included the very first Magical Girl, Mahotsukai Sally (Sally, the Witch), under her original name "Sunny", as Shockwave Alberto's daughter.
• Legendary Manga creator Osamu Tezuka similarly uses Reused Character Designs in his "Star System", wherein a character from a previous work will actually play a different role in another story, as if they were an actor or actress.
• DragonFall◊ blended Dragon Ball, Star Wars and a whole bunch of other series into a parody. With mixed results.
• The intro to the Rumiko Takahashi gallery show It's a Rumic World explicitly crosses over Ranma ½, Urusei Yatsura, and Inuyasha.
• Tsubasa -RESERVoir CHRoNiCLE- has the characters jumping from Alternate Universe to Alternate Universe filled with CLAMP characters from their various series. Amusingly, save a select few examples, mostly as cameos, the Alternate Universes are hardly ever populated by actual CLAMP characters, but Alternate Universe instances of them. Their first crossover happened in Clamp Campus Detectives since the three main character were in series/stories on their own before CCD: Nokoru Imonoyama in Duklyon, Akira Ijuin in 20 Mask ni Onegai (Man of Twenty Masks) and supposedly Suou Takamura showed up in an old oneshot. Then there was X/1999 where characters from past CLAMP series started appearing, including Subaru, the main character of Tokyo Babylon, as a major character, and during his series set in the early 90s it was said that he would have a role in The End of the World as We Know It that is X, making for a bit of foreshadowing.
• Shattered Angels is primarily a crossover of the mangaka and studio's previous works: Destiny of the Shrine Maiden, Steel Angel Kurumi, Magical Meow Meow Taruto, and UFO Princess Valkyrie.
• Before Dengeki Gakuen RPG: Cross of Venus (mentioned below), there was this animated short produced for Dengeki Bunko's 2007 Movie Festival, featuring chibi versions of characters from Kino's Journey, Inukami! and Shakugan no Shana (note that the chibi Shana here is not Shana-tan; for one, she is the stalker rather than said omake series' Kazumi).
• While most Go Nagai series contain cameos here and there, Shin Mazinger goes the whole way. Characters from several alternate versions of Mazinger Z show up, as well as characters from Violence Jack (itself a Deconstruction Crossover) and the title demon from Demon Lord Dante. Unsurprisingly, this series is being directed by the same man behind Giant Robo, Yasuhiro Imagawa.
  • CB Chara Go Nagai World is a crossover which features SD versions of Mazinger Z, Devilman, and Violence Jack, with in-story explanations for the characters being SD, and with plenty cameos (such like UFO Robo Grendizer, Kotetsu Jeeg and Getter Robo).
  • Go Nagai has been doing this for a loooong while. Back in the seventies several movies were made by Toei crossing Mazinger Z with Devilman, Great Mazinger with Getter Robo and Getter Robo G or UFO Robo Grendizer, or several of them together.
  • Super Robot Retsuden, with story and art by Ken Ishikawa, is an Affectionate Parody of those movies. Mazinger Z, Great Mazinger, UFO Robo Grendizer, Getter Robo and Kotetsu Jeeg characters join their forces to face an Eldritch Abomination.
  • And the Dynamic Heroes e-manga is a Crossover featuring Mazinger Z, Great Mazinger, UFO Robo Grendizer, Getter Robo, Getter Robo G, Devilman AND Cutey Honey.
• The Pretty Cure All-Stars movie series allows the Cures from the past seasons to meet (and be friends with) the new team.
• About a week after the debut of the film Dragon Ball Z: Battle of Gods, Goku and his friends turned up in the latest annual One Piece and Toriko crossover episode.
• Kazuma Kamachi has multiple crossovers of his own works, including A Certain Magical Index, Heavy Object, The Zashiki Warashi of Intellectual Village, The Circumstances Leading to Waltraute's Marriage, A Simple Survey, The Unexplored Summon://Blood-Sign and The Weakness of Beatrice the Level Cap Holy Swordswoman. One example is The Circumstances Leading to a Certain Magical Heavy Zashiki Warashi’s Simple Killer Princess's Marriage.
• In The Snow Queen (2005), a lot of references and adaptations of Hans Christian Andersen are included.
• Yatterman Night takes place in a continuity where various characters created by Tatsunoko Production (or at least approximations of them) exist in a shared universe. Even the Mach 5 appears!
• Robot Girls Z combines this with Moe Anthropomorphism by having Mecha Musume versions of Toei's super robots. The leads are girl versions of Mazinger Z, Grendizer, and Great Mazinger, with supporting casts from Getter Robo and Steel Jeeg. The second season then proceeds to add robots from Getter Robo and Gai-king. The show itself is a Slice of Life comedy with the wacky antics of both the Robot Girls Z and their rivals (Robot Girl versions of Doctor Hell's minions).
• Starting with episode 7, the cast of Space Patrol Luluco travels around the universe visiting planets based on other Studio TRIGGER works Kingdom Hearts style.
• The Arabic TV channel Spacetoon produced a play that crossed over Pokémon the Series and Case Closed. No seriously, they did. And there's a Green Aesop for some bizarre reason.
• Isekai Quartet is a comedic take with Trapped in Another World works from Kadokawa Corporation, featuring the casts from KonoSuba: God's Blessing in this Wonderful World!, Overlord, Re:Zero - Starting Life in Another World, and The Saga of Tanya the Evil being transported to another world... To attend high school while animated in an unified chibi style. Season 2 also adds the protagonists of The Rising of the Shield Hero as part of the secondary cast, with characters from Cautious Hero: The Hero Is Overpowered but Overly Cautious appearing as cameos.
• Daicon III & IV feature an extensive amount of characters and objects from other media (used without permission). Star Wars, Starship Troopers, Star Trek, The Elric Saga, Ultraman, Super Sentai, and Godzilla all feature prominently in at least one of the shorts – to say nothing of the shorter cameos, which run the gamut from The Lord of the Rings to Urusei Yatsura to Wacky Races.

• The Big Finish Doctor Who "Sixth Doctor and Jamie" series, which is set entirely in the Land of Fiction:
  • Night's Black Agents is a Scottish Gothic fest, featuring Merodach from "The Brownie of the Black Haggs" by James Hogg, Lucy Ashton from The Bride of Lammermoor by Sir Walter Scott and Thrawn Janet from the Robert Louis Stevenson story of the same name.
  • Legend of the Cybermen features the Artful Dodger, Little Lord Fauntleroy, Alice Liddel, Dracula,Long John Silver and Captain Nemo.

• There's a Star Trek-related comedy routine in which Mr. Spock, HAL 9000, and Obi-Wan Kenobi all appear on Jeopardy, in a mental variant of an Ultimate Showdown of Ultimate Destiny. Kenobi is declared the winner, but only because he uses the Jedi Mind Trick on Alex Trebek.
• Stand-up comedy troupes sometimes feature a series of comedians who usually headline their own shows:
  • The Original Kings of Comedy
  • The Blue Collar Comedy Tour
  • The Comedians of Comedy

• The League of Extraordinary Gentlemen has a Super Hero team composed of multiple public domain characters.
• Future Quest is a six-issue mini-series teaming up the various Hanna-Barbera superheroes, including a quite respectful rendition of the original Jonny Quest and family, the serious iterations of Birdman and Space Ghost, a modernized version of Mighty Mightor, a somewhat modernized version of Frankenstein Jr., a cringeworthy modernization of The Impossibles, and The Herculoids.
• Crisis on Infinite Earths was a massive DC multiverse crossover that attempted to pare down the 837,000 alternate Earths (some populated by the superheroes DC Comics had acquired by buying out other comic book companies over the course of 50 years, others created just to resolve DC's own legendary Continuity Snarls) into one world, obliterating many "Alternate Earth" characters in the process.
• Fables: Just about every Public Domain Character from most Western fairy tales is in this series, with their tales intertwining with everyone else's, as well as quite a few Middle Eastern tales and a few sneaky LawyerFriendlyCameos from tales that are still under copyright: Prince Charming, Snow White & the Seven Dwarfs, Beauty & the Beast, The Jungle Book, the Land of Oz, The Chronicles of Narnia, The Three Little Pigs, the Frog Prince, The Adventures of Pinocchio — and that's a short list. All of them are living in secret as exiled refugees in New York City.
• Castle Waiting is another multiplayer fairy tale crossover, featuring characters from many different tales living together in a castle.
• Planetary is about an investigative super-team in the WildStorm universe. Their members have had run-ins with Dracula, Sherlock Holmes, Jenny Sparks from The Authority and multiple versions of Batman.
• The Indelible Alison Bechdel offered a mash-up of various lesbian and gay comic artists, who threw their characters into the same world for a party. As the mash-up included Diane DiMassa, creator of Hothead Paisan: Homicidal Lesbian Terrorist, the results were hilarious.
• Joe the Barbarian does this in a manner similar to The Indian In the Cupboard.
• A non-canon Judge Dredd story in the 1980 Dan Dare annual had Tharg bring all the popular characters currently being published in 2000 AD as well as the Starlord to Dredd's apartment for a surprise party. Then the robots that actually write the comics went on strike, forcing the characters to beat them all up.
• The Alan Moore comic Albion shoves together a whole bunch of British comic characters of varying obsurity, most of whom are imprisoned by the Government as part of The Masquerade.
• Shi/Cyblade: The Battle for Independents featured many independent comic book characters, including Cerebus, Bone, Hellboy, Madman, Megaton Man, Scud the Disposable Assassin, The Tick and Usagi Yojimbo. Many of the same characters have also appeared in the normalman/Megaton Man special, Gen¹³ ABC and War of the Independents.
• Freddy vs. Jason vs. Ash, and its sequel Freddy vs. Jason vs. Ash: The Nightmare Warriors.
• Dark Horse Comics had Alien versus Predator versus Terminator, Superman and Batman versus Aliens and Predator, and two miniseries that crossed over Witchblade, Aliens, The Darkness and Predator.
• Fantastic Four: True Story has the FF traveling to the realm of fiction, that is attacked by Nightmare, lord of the dreamworld. To fight him they join forces with Dante Alighieri, the Dashwood sisters, Faust, almost all William Shakespeare's protagonists, Frankenstein's Monster, Robin Hood, the Ivanhoe cast and others, while Nightmare gains allies in the Sheriff of Nottingham, Dracula and Long John Silver. Many other characters like Tarzan make cameos and in the end Johnny summons lawyer friendly versions of James Bond, Megatron, Steven Seagal and Chuck Norris to defeat Nightmare's army.
  • Deadpool Killustrated is similar, except that the Merc With A Mouth is killing all the great characters of fiction, in the conviction that if he destroys the heroic archetypes of literature the Marvel Universe will never exist.
• Dynamite Comics:
  • Legenderry: A Steampunk Adventure is an Elseworld to various Dynamite universes, in which Red Sonja, The Green Hornet, The Phantom, Vampirella, Captain Victory, Silver Star, The Six Million Dollar Man, Zorro and Flash Gordon all exist in the same world. Which is Steampunk. The subsequent spin-offs add more crossovers: Legenderry: Green Hornet reveals the Legenderry world has an equivalent of the Land of Oz; Legenderry: Red Sonja has her team up with the Bride of Frankenstein and also features Captain Nemo; and Legenderry: Vampirella has Rupert of Hentzau and Dr Moreau.
  • Pathfinder: Worldscape is another crossover brought by Dynamite Entertainment featuring Pathfinder adventurers alongside Tarzan, John Carter of Mars, Red Sonja and Fantomah, where they are plucked from their respective dimensions and forced to fight against each other and other creatures in the world of Worldscape.
  • Sword of Sorrow features a pandimensional Amazon Brigade comprising Dejah Thoris, Mulan Kato, Irene Adler, Lady Zorro, Lady Rawhide, Black Sparrow, Jane Porter, Jennifer Blood, Jana the Jungle Girl, Miss Fury, Vampirella, Pantha, Masquerade, Purgutori, Chastity, MistressHel, Bad Kitty, and, of course, Red Sonja.
  • The 2013 crossover Masks features all the Coat, Hat, Mask-type characters: The Shadow, The Green Hornet, The Spider, a new Zorro and so on.
• The Totally Stonking, Surprisingly Educational and Utterly Mindboggling Comic Relief Comic (1991) featured (amongst others) the presenters of Comic Relief, Judge Dredd, Dan Dare, Desperate Dan, Dennis the Menace (UK), Roger Melly, Batman, Superman, Wonder Woman, The Incredible Hulk, Spider-Man, Silver Surfer, the Teenage Mutant Ninja Turtles, all seven (then) Doctors, RoboCop, Cookie Monster, and Sir Edmund Blackadder. Sadly but unsurprisingly, copyright issues mean it can never, ever be reprinted.
• Sonic the Hedgehog/Mega Man: Worlds Collide is a crossover between Sonic The Hedgehog and Mega Man. It was followed by a sequel, Sonic the Hedgehog/Mega Man: Worlds Unite, which adds Mega Man X and Sonic Boom into the mix... and halfway through that, even more crossovers from Sega and Capcom's properties were added^note . And while characters original to Archie's Sonic and Mega Man comics did not appear in the first crossover, they do play roles in the second one, with Xander Payne from the Mega Man comic playing a crucial role.
• Disney Mouse and Duck Comics had Donald Duck in "La Storia Infinita", where Donald and Mickey are tasked to save the entire Disney multiverse (meeting such various characters as Maleficent, Merlin, Kaa and Shere Khan, Chip'n'Dale...).
• Revolution (2016) helps IDW Publishing kickstart the Hasbro Comic Universe.
• Vigilant is a team book from Rebellion that brings all the IPC/Fleetway superhero and superheroish characters together. The team is lead by Dr Sin (grandson of Dr Sin from 2000 AD, and introduced in the previous year's one-shot Scream! and Misty Halloween Special) and includes Steel Commando, the Leopard (of Lime Street), a new Thunderbolt the Avenger, Blake "Deathwish" Edmonds, Pete's Pocket Army, Death-Man and Yao (new characters introduced in the aforementioned special), and M.A.X. (from the Scream! strip The Thirteenth Floor), trying to rescue Adam Eterno from a Legion of Doom comprising IPC's Villain Protagonists. The Esper Commandos (from Pow!) and Crabbe's Crusaders (from Buster) are also called in to help. In addition, a back-up strip sees Edmonds getting sent to the dystopian world of the Action strip "Kids Rule OK!"
• Adler, by Lavie Tidhar and Paul McCaffrey, is a Steampunk adventure featuring major characters from the Sherlock Holmes mythos, She, Jane Eyre, Carmilla, and Little Orphan Annie, and minor characters from many other 19th century works.
• Parodied in MAD Magazine's satire of The Facts of Life ("The Yaks of Life"). The final panels depict "Beastland Academy's" Parents Day Picnic, where it's revealed that "Blah's" dad is J.R. Ewing, "Tootsie's" parents are George and Louise Jefferson, "Moe's" father is Det. Mick Belker, and "Nutalie" is the daughter of Boss Hogg. When all these obnoxious characters start bickering amongst one another, the sheer madness of it is enough to cause "Mrs. Ferret" to have a nervous breakdown.
• The Simpsons Futurama Crossover Crisis: The final part of the second miniseries becomes this when every fictional character from every book ever written comes to life and causes chaos in New New York.
  • The list includes: Anne of Green Gables, Tom Sawyer, Dracula, Harry Potter, The Cat in the Hat, The Three Musketeers and the Man in the Iron Mask, Captain Ahab, Hamlet, Alice, the Cheschire Cat, Tweedledee, and Tweedledum, Sherlock Holmes and Dr. Watson, Robin Hood, Paul Bunyan and Babe the Blue Ox, Dorothy, the Tin Man, and the Flying Monkeys, The Invisible Man, some Hobbits, John Grisham lawyers, Pennywise, Carrie, Christine, Jack Torrance, Cujo, Isaac, the Artful Dodger and Mr. Bumble, Tarzan, the creatures from Hop on Pop, Captain Nemo, Inspector Javert, Conan the Barbarian, Dr. Jekyll/Mr. Hyde, Raoul Duke, Peter Pan, Nancy Drew, Pippi Longstocking, Superman, Batman, Wonder Woman, Spider-Man, Wolverine, Captain America, The Mighty Thor, Little Red Riding Hood and the Big Bad Wolf, Frankenstein's monster, Atticus Finch, and Ponyboy Curtis.

• Blondie and Dagwood celebrated their 75th anniversary with a who's who of other comic book characters, far too many to list here.

• Toy Story features many toys from rival companies as major or minor characters including Mr. Potato Head, Barbie, and LEGO among many others. (And probably some expies too.)
  • Also Totoro. Because why not?
• The Shrek films do this to fairy tale characters.
• Wreck-It Ralph does this with arcade video game characters.
  • In Ralph Breaks the Internet, Vanellope is sent to the website Oh My Disney, where she meets all the Disney Princesses (and inspires them to wear comfortable clothes). The site is also populated with characters from subsidiaries Pixar, Lucasfilm and Marvel Studios.
• The LEGO Movie features Batman, Superman, Wonder Woman, Green Lantern, The Flash, Gandalf, Dumbledore, Milhouse, Speed Racer, the Teenage Mutant Ninja Turtles, Han Solo, Chewbacca, C-3P0, Lando... and that's not including characters from LEGO's own themes!
• Foodfight! (2012) did this to advertising mascots (called "Ikes" in the film - the characters' slang for icons).
• The Search For Mickey Mouse was a scrapped Disney film from the early 2000s meant to coincide with Mickey Mouse's 75th anniversary. In it Mickey gets kidnapped. Goofy, Donald Duck, and Basil from The Great Mouse Detective go around the world looking for him and encountering numerous Disney Animated Canon characters. The film was inspired by cut scenes from Who Framed Roger Rabbit and Fantasia 2000. Rumors existed that the film was coming out as late as 2012. The film however was cancelled all the way in 2002. The team couldn't figure out how to make an engaging film with a decent plot that also involved Disney cameos every few scenes. A more successful crossover involving Disney IP's would eventually materialize in the form of the Oh My Disney sequence in Ralph Breaks the Internet (see above).
• Dingo Pictures' Animal Soccer World includes animal characters from most of their Disney Mockbuster movies.
• At the very end of The Lion King 1 ½, various Disney characters enter to rewatch the movie.

• Who Framed Roger Rabbit crossed over Disney characters with characters from Warner Bros. and other studios, saying that they all co-existed with humans as actors in Hollywood, and that they all hail from "Toontown", which seemed to be half Los Angeles and half Alternate Universe. That said, the actual plot mostly revolves around characters specific to the movie (and the book on which it was loosely based), with the pre-existing characters mostly being cameos.
• Chip 'n Dale: Rescue Rangers (2022) takes place in a world similar to Roger Rabbit, even including the bunny himself in a scene. Only with downright every property under the sun, animated or live-action (such as a brief scene showing the movie Batman vs. E.T.''), and even family-unfriendly.
• The Area 52 scene in Looney Tunes: Back in Action involved the heroes facing off against Marvin the Martian, who led a group of sci-fi aliens which included a Triffid plant, the eponymous Robot Monster, the mutant from This Island Earth and even freaking Daleks!
• Many Seltzer and Friedberg works, such as Epic Movie and Disaster Movie, could be considered Massive Multiplayer Crossovers, insofar as they feature many characters and plot elements (or weak parodies thereof) from recent movies and mash them all together.
• Mega Monster Battle: Ultra Galaxy Legends fuses many Ultra kaiju from many different series into one movie.
• Toy Story features many toys from rival companies as major or minor characters including Mr. Potato Head, Barbie, and LEGO among many others. (And probably some expies too.)
• Marvel Cinematic Universe:
  • The Avengers served as the first major one of these, which prior to then were only connected via references or brief cameos. It brings in characters from Iron Man, The Incredible Hulk, Iron Man 2, Thor, and Captain America. Since then, pretty much every MCU series has been a crossover in some way.
  • Avengers: Infinity War features not just the Avengers, but pretty much all superheroes from Marvel Cinematic Universe film series, including the Guardians of the Galaxy, Doctor Strange and Wong, Black Panther and other Wakandans, Asgardians, and Spider-Man.
  • Spider-Man: No Way Home is the first multiversal crossover for the franchise, bringing over villains from the Sam Raimi Spider-Man Trilogy and The Amazing Spider Man movies as well as both of their respective Spider-men. Also, Eddie Brock appears in The Stinger. On a different note, Matt Murdock makes a cameo, being the first outright crossover from the Netflix MCU series alongside Kingpin appearing in Hawkeye around the same time.
• Justice League is the closest the DC Extended Universe has come to this.
• In 1959 a movie was released called Alias Jessie James starring Bob Hope, who was a big fan of TV westerns; he used his clout to include characters from nine different shows in what would turn out to be the first of three Western massive multiplayer crossovers. People appeared in that movie from The Lone Ranger, The Gene Autry Show, Annie Oakley, Davy Crockett, The Life And Legend Of Wyatt Earp, Gunsmoke, Wagon Train, The Roy Rogers Show and Maverick.
• In the 40th Anniversary OOO, Den-O, All Riders: Let's Go Kamen Rider has all of the main riders from Kamen Rider #1 to Kamen Rider OOO.
• Space Jam: A New Legacy one-ups the original by not only featuring the Looney Tunes, but just about every major film and TV franchise from Warner Bros.. in a "Serververse" where every IP has its own planet.

• The Argonautica (more commonly known by the adaptation Jason and the Argonauts) by Apollonius of Rhodes (3rd century BCE) is one of the very first Massive Multiplayer Crossovers, arranged in what would become a fairly classic method — basically throwing one or two dozen heroes from various separate Greek myth cycles together on a boat with a common mission. This of course makes the Massive Multiplayer Crossover Older Than Feudalism.
• Many of the same characters also appear in the story of the Kalydonian Boar Hunt — which, Depending on the Author, may occur before or after The Argonautica.
• According to some religious studies texts, this has also gone on in many, many other myths: the most notable involve various saints meeting each other. This goes on even today.
• Arthurian Legend incorporates characters from various mythical cycles, which has also made it something of an Anachronism Stew. Gawain, Tristan, and Merlin, nowadays permanent fixtures in the mythos, were originally folk heroes in their own right, and for centuries, writers have added new characters relevant to their own contemporary times or Creator Provincialism (Lancelot from the French, for instance).

• During the 1990s, Weekly Pro Wrestling in the Tokyo Dome would feature "Offer Matches", pro wrestling, shoot fighting and mixed martial arts from All Japan, the other All Japan, FMW, IWA Japan, JWP, LLPW, Michinoku, New Japan, Pancrase, UWF, RINGS as well as finding time for two other indie promotions in addition to these(such as PWFG and Go Gundan) on the same card(they even had some bouts with "UFC rules"). It didn't last, getting all those promoters together is hard, but these were very successful as far as filling the building with fans went.
• Dramatic Dream Team (basically a parody of American wrestling), Pro Wrestling NOAH (American style matches only with a more realistic take and a more formal presentation), Pro Wrestling ZERO1 (even more emphasis on technical matches than NOAH but have tendencies toward exaggerated gimmicks and bizarre angles), Michinoku Pro Wrestling (largely based on Mexican Lucha Libre though there are some "Japanese strong style" staples) and IWA Japan (features "hardcore" wrestlers and has strong Puerto Rican influences) all got together to do a Differ Cup, which was as odd and entertaining as that many collaborating together sounds could be.
• In its early years, Ring of Honor was involved in a three way cross promotional rivalry between itself, IWA Mid-South and NWA Wildside. DO OR DIE II had the additions of NWA Midwest, NWA Florida, PCW, So Cal Pro and Pro Wrestling Guerilla.
• Sumie Sakai's We Love Sabu benefit show on April 17, 2005 at the Tokyo Differ Ariake had former FMW wrestlers Masato Tanaka, Mr. Gannosuke, Megumi Kudo, Kintaro Kanemura, Tetsuhiro Kuroda, Mammoth Sasaki, GOEMON, Onryo, Hido, Shark Tsuchiya, Hisakatsu Oya, Ricky Fuji, Miss Mongol, Gosaku Goshogawara, Kaori Nakayama and Hayabusa to represent the then dormant promotion, Ryuji Ito, Necro Butcher and Daisuke Sekimoto from Big Japan, Crazy SKB and Shinobu from 666, The Apache Army's Akrangers Takashi Sasaki & GENTARO, Asian Cougar, Asian Condor, Asian Monkey, Lingerie Muto, GAMI, Fang Suzuki, Seiji Ikeda, Eddie Edwards and The Sandman.
• In 2007, Alex Shane and Doug Williams called sixteen promotions to Liverpool England for a "King Of Europe Cup". Jody Fleisch represented 1PW, Claudio Castagnoli represented Chikara, Chris Hero represented CZW, Ryo Saito represented Dragon Gate, El Generico represented the International Wrestling Syndicate, Matt Sydal represented IWA Mid-South, PAC represented IPW:UK, Davey Richards represented Pro Wrestling Guerilla, Go Shiozaki represented Pro Wrestling NOAH, Trent Acid represented Pro Wrestling Unplugged, Martin Stone represented Real Quality Wrestling, Nigel McGuinness represented Ring of Honor, Rhino represented TNA, Ares represented westside Xtreme wrestling, Zebra Kid represented World Association of Wrestling and Williams himself represented Premier Promotions. In addition, there were two "Taste Of IPW:UK" pre shows.
• Vendetta Pro started hosting Casino Royale crossovers in conjunction with the Cauliflower Alley Club in 2011, which also saw the involvement of Adrenaline Unleashed Wrestling. 2014 saw collaboration between Dropkick Depression, Gold Rush Pro Wrestling, the NWA, All Pro Wrestling and ChickFight for a two night Casino Royal event.
• Sendai Girls Pro Wrestling hosted the Dantai Taikou Flash Tournament in November 2011. Teams from JWP, Diana, REINA, WAVE, Ice Ribbon and Wonder Ring STARDOM entered it.
• The World Wrestling League has been on a mission to facilitate them since 2012. In Bolivia, it pitted wrestlers from multiple associates such as Dominican Wrestling Entertainment and Peru's Leader Wrestling Association against locals from La Paz based New Xtreme Order at the Campeones Del Ring: Hacedores de Proezas event on June 25th, 2013. It even got representation from a non associate, Ring Warriors.
• nCw Femme Fatales XI boasted a "Triple Main Event" featuring championships of three different women's promotions from three different countries all on the line. The Bellatrix World Title(UK), SHIMMER Title(USA) and nCw FF International Title(Canada).
• At CHIKARA JoshiMania, women from JWP, Pro Wrestling WAVE, Osaka Joshi, Union Pro Wrestling and Oz Academy were all featured.
• Argentina in the 90's had a Rambo-themed wrestling show entitled Rambo y sus Titanes, which featured matches between Rambo characters. The show was actually a Spin-Off of the action figures for Rambo: The Force of Freedom (which were extremely popular in South America), and produced by Jocsa — the manufacturer of said toys. The wrestlers' costumes were modeled upon the toys, even going as far as giving Rambo a mask to give his face a more toy-like physique. Sometimes, it also turned into a Product-Promotion Parade for other toylines produced by Jocsa by featuring non-Rambo characters (such as Police Academy).

• The BBC Radio 4 series The Rivals is a series of adaptations of various Victorian detective stories by people who weren't Arthur Conan Doyle, based on the short story collections The Rivals of Sherlock Holmes edited by Hugh Green. What makes the radio series a Massive Multiplayer Crossover rather than a sequence of unrelated dramas is that Inspector Lestrade is added to every story as The Watson, placing them all in the same Verse.

• Once Upon a Multiverse is based on this concept, doing for fiction what Once Upon a Time (2011) did for fairy tales. The main cast alone pulls from Firestorm (DC Comics), Mob Psycho 100, Kill la Kill, Fire Emblem: Genealogy of the Holy War, Super Friends, Half-Life, Undertale, The Ones Within, Mafia, Spiderman PS 4, Dragon Ball Z, Steven Universe, and Magic: The Gathering.That's not even getting into the supporting cast.
• The Massive Multi-Fandom RPG, TV Tropes' own Massive Multiplayer Crossover-type Play-by-Post Game. The premise: a mysterious, all-powerful being known only as The Troper has ripped dozens of characters out of their universes and dumped them into an enclosed city with no way out. Each new day the city's inhabitants are subjected to a new, often absurd, scenario called a "curse"—having their genders reversed, being transformed into animals or being transported into a dinosaur-infested jungle. The game included characters from Pokémon, Fullmetal Alchemist, Ghost Recon, Valkyria Chronicles, X-Men, Mass Effect, Lost, Star Trek, Danny Phantom, Halo, Tengen Toppa Gurren Lagann, Metal Gear Solid, No More Heroes, Star Wars, and Kingdom Hearts among many, many, many others. Season 2 began almost as soon as Season 1 ended, and featured characters from Soul Eater, Mega Man X, Firefly, Lyrical Nanoha, Yotsuba&!, Green Lantern, Neon Genesis Evangelion, Castlevania and more. Season 3 introduced characters from Disgaea, Metroid, Persona 3, Hayate the Combat Butler, God Hand, Slayers and more.
• TV Tropes's resident Hunger Games Simulation thread has featured countless characters from hundreds of different media (from the mainstream to the ridiculously obscure) since its debut in 2016. The roleplay threads tying into it (both the original thread Convergence and its reboot Another Side, Another Story) that show the adventures of the nominators and their friends in Panem, along with often featuring the characters who get nominated in the main HGS thread as drop-in characters, has a regular and recurring cast that has featured characters from the likes of The Legend of Zelda, Undertale, The Magic School Bus, My Little Pony: Friendship Is Magic, Ice Age, Big City Greens, Steven Universe, Looney Tunes, EarthBound (1994), Ultra Series, Kirby and more.
• The number of franchises characters come from in Campus Life is absurd. In a short list there's EarthBound (1994), Sonic the Hedgehog, Pokémon, Soul Calibur, My Little Pony: Friendship Is Magic, Star Wars, Pikmin, Klonoa, BlazBlue, Portal, Stargate, Dragon Ball, Iron Man, and many, MANY others.
• The Fictional ISOT Map Game series of AlternateHistory.com takes its premise as being about 2-dozen or so nations from different works of fiction suddenly being transported to a "blank" Earth without sentient life.
• Although there are many similarly-themed RPs, Milliways Bar deserves mention just for its size. The basic premise is that any character from any fandom can find themselves at the titular bar... and sometimes it seems like just about everyone has.
• Destroy the Godmodder, as a result of the flexible summoning system, can crossover with literally 'anything' as a result of player actions, with the GM often expanding on that crossover. There's a reason why it's often referred to as "the biggest Crack Fic ever written." It's Justified due to the games taking place in an infinite multiverse containing every fictional universe ever created.
  • An example of how crazy the crossovers in Destroy the Godmodder can get is the Arrival - a story event at the end of Act 3 that featured Project Binary, Bill Cipher, GLaDOS, and King Ikea, a 'sapient table', teaming up to invade Minecraftia. This was following the Homestuck invasion in the previous Act.
  • As of DTG 2: Minecraftia, the setting of the game, is threatened by the Godmodder, a mysterious employer who convinced Doc Scratch, Lord English, and the Condescence to invade it, and team of Well Intentioned Extremists known as the counter-operation that was set up my the U.S Government and is made up of an AI called Project Binary, GLaDOS, and Bill Cipher.
  • The heroes consist of the insane king of the Nether accompanied by Midna, who wields the Twili version of the Master Sword, an elven mage who happens to be an alien from a Sburb session, a warrior-engineer from the Warhammer 40K universe, another elf, this time an engineer who is companions with an iconic drunken robot and owns a space station populated by a small army of kerbal researchers and run by HAL 9000.
• The premise of Trespassers of the Multiverse: Gaiden is characters coming from different worlds to make a Last Stand against a Horde Of Ancient Locusts.
• The forum roleplay City of Lost Characters (a Spiritual Successor of sorts to the Massive Multi-Fandom RPG, above), where characters from all over the multiverse are trapped inside an ever-shifting city and subject to a series of challenges. The first few player characters included arrivals from Ben 10, Mass Effect, League of Legends, Rick and Morty, Danny Phantom, Undertale and No More Heroes. In total, the roleplay featured player characters from more than a hundred different franchises.
  • Its sequel, New Game+, is just as much this as its predecessor. The first few arrivals included characters from Persona 5, Rise of the Teenage Mutant Ninja Turtles, Shantae, Panty And Stocking, Resident Evil, Mountain Time, The Great Gatsby, and many more.
• Super Magic Wars V: Done in the style of Super Robot Wars, as in the name and as said above. The plots are all taking place in a single cohesive world rather than a mashup crossover of unknown elements meeting each other. The unknowns make better contact through the main characters themselves rather than through the universe as a whole, with each member of the cast learning something new about what's going on.
• TV Tropes Roll To Dodge: So far we've seen elements of Touhou Project, Maid RPG, Metroid Prime, Silent Hill, Dwarf Fortress, and a player has teleported to the Mass Effect universe. Due to major controversy regarding the place where Touhou Project takes place, Gensokyo had been closed off temporarily.
• Up, Up and Away! is the Spiritual Successor to Justice Avengers, and has only one rule when it comes to characters: so long as they can be fit into a Superhero setting, anything goes. The first fight of the RP saw characters from Borderlands, Transformers, Naruto, Captain Underpants, Teenage Mutant Ninja Turtles, The Powerpuff Girls, and Sonic the Hedgehog (Archie Comics) teaming up to fight a giant robot monkey sent by Lord Recluse, and it only gets crazier from there.
• The Forum Quest "Usagi Quest" crosses over Sailor Moon and the authors extensive original worldbuilding with, to date:
  • Several PreCure series
  • Ranma 1/2
  • Inuyasha
  • Lyrical Nanoha
  • Symphogear
  • Encanto
  • WITCH

• Vehicular motorsports, especially auto racing, motorcycle racing and rallying, are the Real Life examples of this trope. When you have car/bike manufacturers bring their works teams into the racing series, which are also joined by privateer teams in different locales respectively. Formula One, World Rally Championship, MotoGP, NASCAR, Formula E, Isle of Man TT, Dakar Rally, and 24 Hours of Le Mans are some of the famous examples.
  • The annual Race of Champions takes things a step further by taking the best drivers from all of the above series and more, and pitting them against each other in equal machinery. The 2023 edition, for example, featured four-time F1 champion Sebastian Vettel, nine-time WRC champion Sebastien Loeb, nine-time Le Mans winner Tom Kristensen, IndyCar race-winner Felix Rosenqvist, X Games gold medallists Tanner Faust and Travis Pastrana, two-time touring car champion Adrien Tambay, and even two-time Formula One eSports champion Jarno Opmeer. The eventual winner? Rallycross and DTM champion Mattias Ekstrom.

• Heroes and Monsters of the Millennium is a conversion for the Unisystem RPG ruleset, mixing Buffy the Vampire Slayer/Angel with everything from Marvel and DC Comics to Stargate SG-1, Godzilla, Ultraman, Lyrical Nanoha, Gargoyles, Negima! Magister Negi Magi, the works of H. P. Lovecraft, Mazinger Z and many others. With considerable overlap in themes, races, and technology.
• Chaos TCG, Sieg Krone and Weiss Schwarz TCG feature characters from several anime series.
• The Spelljammer and Planescape settings were designed with this in mind. Spelljammer in particular has rule books dedicated to detailing the Crystal Spheres of settings such as Krynn, Abeir-Toril, and Oerth. Where as Planescape has portals to every type of world imaginable.
• Collectible Card Games that operate off of a Universal System allow for this; the Universal Fighting System lets you pit Chun-Li against Nightmare, the VS System crosses over Marvel Comics and DC Comics, and the Crusade System lets you pair Spike Spiegel, Edward Elric, and Cutey Honey with Humongous Mecha from Macross, Super Robot Wars: Original Generation, and countless others.
• Similarly, the Hero Clix tactical miniature combat game works on a Point Build System basis and includes characters from many comic books (Marvel and DC, but also "indie" ones); Superman, Dhalsim and Dark Phoenix against Dr. Manhattan, Beta Ray Bill and someone else to match character points is a perfectly reasonable battle.
• Hasbro's short lived Attacktix line advertised itself based on the crossover possibilities of both Star Wars and Transformers, with promotional materials pitting the Transformers: Cybertron versions of Optimus Prime and Megatron against Darth Vader and Luke Skywalker. The Marvel Universe would eventually be added in towards the end of the line's run.
• Ani-Mayhem, a Collectible Card Game produced in the middle 1990s by Pioneer Entertainment that set characters from many different anime settings — surprisingly including many series licensed by companies other than Pioneer — in a grand romp across their various worlds.
• While City of Mist has a more folkloric slant, the only true rule when it comes to Mythoi is that they're fictional characters. Aside from that, anything goes, so technically you could have the Rifts of Mario, Joseph Joestar, and Star Butterfly investigate the murder of Princess Zelda.
• Disney Lorcana features characters, items, events, locations, and songs from all manner of Disney Animated Canon works teaming up to go on quests together—the only limit is the deck's ink colors and the player's imagination. Later expansions dipped into tv shows as well, featuring characters from Ducktales 2017 and the original Talespin.
• Thanks to the Universes Beyond imprint, Magic: The Gathering decks can become this in certain play formats. In addition to characters and settings originating from Magic lore, players can also include cards depicting things from The Walking Dead, Stranger Things, Arcane, Dungeons & Dragons (including characters designed for Baldur's Gate III and Honor Among Thieves), Street Fighter, Fortnite, Warhammer 40K, Transformers, The Lord of the Rings, Creepshow, Doctor Who, Evil Dead, The Princess Bride, Jurassic Park (1993) & World, Tomb Raider, Clue, Fallout, and Assassin's Creed. Collaborations with Final Fantasy and Marvel Comics have also been announced.
• Monopoly has had a plethora of special edition board games themed after different brands, but it brings together 90 different Hasbro brands in the Hasbro 100th Anniversary edition. The tokens are a tin of Play-Doh, Mr. Potato Head, Bumblebee, a Tonka truck, Peppa Pig, a Nerf Football, the Planeswalker symbol and Pinkie Pie. Lincoln Logs and Littlest Pet Shop hotels serve as houses and, well, hotels, and the spaces are all filled with different Hasbro brands, with the artwork for the entire board being littered with characters and items from Hasbro toys and games, ranging from Bop It and Baby Alive to Power Rangers and Scrabble.
• Mechanics-wise, many d20 System games are so similar to each-other, what content can be transplanted from one system to another with little-to-no tinkering. Also, different games include entirely different worlds and settings; also, different parts/books/enchantments of same game can include different settings. And some settings include means for time travel, inter-world travel, FTL and/or inter-dimensional transportation - be it sci-fi technology or Functional Magic. Suddenly, situation of "Dungeons & Dragons Spellcaster going to [insert sci-fi setting] and trying to buy [insert equipment/vehicle/etc]" doesn't sould like nonsense.

• The works of Dr. Seuss were combined into a Broadway musical called Seussical, which mainly takes its story from Horton Hears a Who!, Horton Hatches the Egg, and The One Feather Tail of Miss Gertrude McFuzz, but contains elements and characters from I Had Trouble in Getting to Solla Sollew, The Butter Battle Book, How the Grinch Stole Christmas!, and more. And of course, they have The Cat in the Hat to move the plot around.
  • Jim Henson's The Wubbulous World of Dr Seuss did something similar, with Yertle the Turtle as a recurring villain.
• Into the Woods, a multiplayer crossover borrowing from some Grimms' fairy tales.
• The Tony Awards, especially more contemporary ceremonies, often will lean into the territory of this trope with the cast of nominated shows (as well as anything currently running) appearing in skits and the opening number, or at least a group of reference to Broadway classics. However, the 67th Tony Awards does something interesting: the opening production number, a dedication to taking it up to eleven called "Bigger", began with host Neil Patrick Harris performing among the Broadway casts of Once. As the performance goes on, he ends up dancing with the casts of Kinky Boots, Motown, the circusey Pippin revival, Bring It On, Matilda, A Christmas Story, the Annie revival, Rodgers and Hammerstein's Cinderella and Mike Tyson (apparently he had a one-man show), climaxing with the casts of currently-running Broadway shows running up and down the aisles.
  • On top of that, the casts of then-running shows introduced the performances of the night in-character. Among the more surreal ones were a chorus of Spider-Men introducing the revival of Annie, the Rock of Ages cast introducing Cinderella and Mufasa and Simba introducing the Pippin revival.
  • Bonus points for the music for the broadcast, consisting of a pre-Hamilton Lin-Manuel Miranda andTom Kitt, who wrote "Bigger", Michael John LaChiusa, who wrote lyrics to a parody medley for Andrew Rannells, Megan Hilty, and Laura Benanti, Cindi Lauper (who wrote the music for Kinky Boots) singing the "In Memoriam", and Audra McDonald, who closed out the show with Miranda.
• Any revue based around a composer's work is going to be one of sorts. Prince of Broadway is notable for (a) being a revue dedicated to a Broadway director, Hal Prince, and (b) recreating scenes from some of his most famous productions. The end result is a set list made up of excerpts from Sweeney Todd, Phantom of the Opera, Cabaret, and Superman.

• Several examples in the Disney Theme Parks. The biggest example is Fantasmic!, where a Legion of Doom of Disney Villains invade Mickey's mind.
• At Universal Studios:
  • The Funtastic World of Hanna-Barbera was about Yogi Bear chasing after Dick Dastardly through the worlds of The Flintstones, Scooby-Doo, and The Jetsons.
  • Jimmy Neutron's Nicktoon Blast was this between almost every Nicktoon made up until 2003.

• Bound to happen in toy model cars when many series include a mix of different brands from different makers. Hot Wheels do this often due to licensing from real-world carmakers.
• There exists a bootleg set of action figures dubbed The Sense of Right Alliance that consists of a Lightning McQueen recolor, the Blue Ranger, Superman, Batman, Spider-Man, and Shrek, which also has Mr. Incredible, the Red Ranger, Venom, and the Teenage Mutant Ninja Turtles depicted on the packaging. It's become a minor Internet sensation, spawning several fake trailers and at least one short film.

• The Machinima Beans. Firstly, it crosses over characters from three different series and is made by three different machinima directors, then the storyline involves various internet memes... Oh. And it's made on Super Smash Bros.. Making it a crossover on a crossover.
  • Technically, any community-made Machinima will have this in spades. Want to see Duke Nukem appear together with some Daleks? It's been done.
• The Frollo Show, made by the same creator of Smash Bros. Lawl, is also this, with characters from various media such as Frollo, Gaston, Panty and Stocking, and other cartoon, anime, film, and video game characters (see here for more). Unlike most examples, it eventually starts developing an interesting plot and deeper interactions between all the characters.
• Gaming All-Stars: A Garry's Mod series consisting of dozens of video game franchises. It's so ambitious it gives Super Smash Bros. a run for its money; to name just a few of the franchises involved, there's Super Mario Bros., Sonic the Hedgehog, [PROTOTYPE], Crash Bandicoot, Spyro the Dragon, Mortal Kombat, Rayman, Red Dead Redemption, Team Fortress 2, Tekken, and the list goes on. If that doesn't sound crazy enough, it has a Sequel Series (Gaming All Stars 2) that brings the number of franchises involved up to eleven.
• Two words: Gory Toons. This Happy Tree Friends-inspired cartoon features an abundance of characters. These generally include but not limited to: SpongeBob SquarePants, Happy Tree Friends, Kirby, South Park, Tom And Jerry, Super Mario Bros., Sonic the Hedgehog, SuperMarioLogan, and more!
• "Multiverse" An hour long fan edit of Avengers: Endgame adding in an insane number of fandoms including Shrek, Star Wars, Star Trek, One-Punch Man and Chuck Norris just to name a few.
• Following a few years of doing LEGO-only content, around late-2019 pantsahat expanded his Stop Motion Animation horizons, resulting in a crossover involving LEGO minifigures, Master Chief, Astolfo, a gangsta version of Tahu, Batman, Duke Nukem, Walter White, Darth Vader, and many more.
• The Movie of the Century: The series' cast includes:
  • White Hare, the Mad Hatter and the Cheshire Cat from Alice in Wonderland (1951)
  • Batman and Two-Face from Batman
  • Dexter from Dexter's Laboratory
  • Edd, Matt and Tom from Eddsworld
  • Timmy, Cosmo and Wanda from The Fairly OddParents!
  • Bender from Futurama
  • Master Chief from Halo
  • Homestar Runner, Strong Bad, Strong Sad, Marzipan and the Cheat from Homestar Runner
  • Kirby, King Dedede, Whispy Woods and a number of Waddle Dee from Kirby
  • Link and Ganon from The Legend of Zelda
  • John Locke, the Man in Black and Hurley from Lost
  • Morpheus from The Matrix
  • Solid Snake from Metal Gear
  • Samus from Metroid
  • Phineas, Ferb, Candace, Doctor Doofenshmirtz and Perry the Platypus from Phineas and Ferb
  • Olimar and the Pikmin from Pikmin 1.
  • Professor Utonium and Mojo Jojo from The Powerpuff Girls (1998)
  • Spongebob, Mister Krabs and Squidward from SpongeBob SquarePants
  • Fox, Falco, Peppy, Slippy, ROB/NUS64 and Wolf from Star Fox
  • Darth Vader and the Stormtrooper from Star Wars
  • Mario, Luigi, Peach, Lubba, Bowser and a few Goomba from Super Mario Bros.
• Since Shrapnel is a Stop Motion animated series that uses a mix of original/custom figures and figures/toys from other franchises, the cast is quite the mish-mash of characters, including but not limited too: Living Weapon - Minions^note , robloxians trying to take over "Uganda" from the Ugandan Knuckles to build a new server, Fluttershy as a mob boss(?), Lucario hanging out at a bar, etc.
• Smash Bros. Lawl is a series of video animation parodying the gameplay of Super Smash Bros. with characters from various media ranging from King Harkinian, Tommy Wiseau, Madotsuki and way more. It also inculde some original ideas like selectable announcers including Morgan Freeman, Will Smith and some others.
  • It get's even worse when Lawl spawned a community with even more character like YTPGuy17's Lawl, Agito's Lawl X, Skapokon's Lawl Nova, ShadBad's Lawl Beatdown; and so on.
• SMG4 has as its base the Super Mario Bros. franchise, like you'd expect. But over its long run it's added recurring characters from The Legend of Zelda, Goldeneye 1997, Sonic the Hedgehog, Pokémon, Kingdom Hearts, Splatoon, Animal Crossing, Resident Evil, and of course Steve. That list doesn't include the show's absurd number of cameos by meme characters.
• The "Super-Hero-Bowl!" series from ArtSpear Entertainment, in which fictional characters from over a hundred movies, TV shows and series exists in a paralle universe and have to fight each other to the death. The sequel FANFICTASIA is even more crowded, adding characters from animation and video games to the live-action ones.
• Tonin: After the series ended, some characters featured in "Transando Essa Transa", a web animation story featuring characters from "Tonin" and from other series belonging to the same website, namely "Espinha & Fimose"; "Só Levando"; and "Tobby Entrevista".
• Fazbear and Friends (ZAMination): The series always enjoyed making Crossovers of other Indie games that are not Five Nights at Freddy's, such is the case of Bendy and The Ink Machine, Friday Night Funkin', Baldi Basic's Education and Learning, Poppy Playtime, Among Us, and even from Web series and anime like Helluva Boss and Chainsaw Man, most often, a character doing a job at the pizzeria or trapped in a place where there are deadly games, they will always end up forming an alliance to win, or on other occasions, interrupting some shorts or making cameos as the plot indicates.
• The final episode of the Newgrounds series FDA is a giant collaboration of Newgrounds contributors inserting zombie versions of their creations singing explicit parodies of "Time Warp" and "Thriller". The full list of cameo appearances include Tom Fulp's Pico and R2FU, Zeebarf's Disorderly and Sillygoths, Will Stamper's Keeblur Elf, a zombie version of C. W. Stoneking, Jeremy Lokken's parodies of Sloth and LeVar Burton, Dave Ensign's Jim the Cat, Tony Gines' Big Gay Bubba and Squiggo, Rob DenBleyker's Joe Zombie, and Rob Schrab's "Robot Bastard". Numerous other artists contributed nameless zombie characters.

• TV Tropes:
  • TV Tropes has the Trope Pantheons, where thousands of characters are considered gods of certain tropes. Hundreds of franchises and celebrities are represented, with interactions between many of the characters.
  • TV Tropes has one for the works of the Walt Disney Company called Friends and the High Council.
  • TV Tropes' very own Alternate Reality Game The Wall Will Fall has many fictional characters entering the real world.
  • TV Tropes also used to host a collaborative writing project called TV Tropes the TV Show, which was also based on the premise of countless fictional characters invading the real world, and tropers fighting back against them.
• The Free Universe is a website dedicated to being a source of Public Domain Characters and elements from multiple sources for anyone to use. The characters can be used on their own and individually, or they can all be used as part of one crossover universe, the titular "Free Universe".
• The Game in which Life in a Game takes place seems to take all video games as true, with Zelda appearing alongside Master Chief, and Frog serving as the hero's Jerkass Mentor.
• Channel Awesome:
  • The one year anniversary video. Basically, in a Chicago hotel 20 contributors of Video Review Shows beat up one another in an Ultimate Showdown of Ultimate Destiny, climaxing in Super Mega Death Christ vs. Giant Robotic Donkey Kong Jesus riding a puff of smoke blowing up. You know what? Just watch it.

  Ask That Guy: (speaking to the various reviewers present) In fact, I think there's a lot of you who want to do crossovers, aren't there? Because everybody really eats that shit up.
  Everybody: Yeah!

  • All the cast stayed in Chicago for a couple more days to film crossovers after this. Highlights include Linkara being force-read his own Massive Multiplayer Crossover fanfiction by the Sage, the Ultimate Warrior writes a comic series so bad that reality breaks down and Linkara and Spoony keep changing into different Alternate Universe selves and the Critic and Nerd joining forces to review... a Making Of of a Teenage Mutant Ninja Turtles Tour. Yeah.
  • Later on when faced with Uwe Boll's Alone in the Dark (2005), the Nostalgia Critic gave up on reviewing it. Until! Spoony and Linkara arrived to assist him.
  • 2010 kicked off with an epic review of Dragon Ball Evolution, starring Paw, LordKat, Rollo T, Hopewithinchaos, and Y Ruler of Time, with guests including LittleKuriboh, MasakoX and Stop Skeletons From Fighting. This was recorded while everyone was attending MAGFest.
  • The Two Year Anniversary is another huge crossover event. And in turn, it allowed some once-in-a-lifetime crossovers as by this point, quite a few reviewers are from around the world.
  • In 2011, things repeated. Y Ruler of Time used MAGFest to do another multiple reviewer crossover (The Last Airbender, with Todd in the Shadows, JesuOtaku and RolloT, plus various cameos). And Year Three had a crossover series and various individual joint reviews (Todd even opens his one saying that the trip means crossovers... and gets shot down by three people before Film Brain accepts to watch a movie with him).
  • And once again in 2012. However, this time it was Linkara that used MAGFest for a multi-reviewer crossover (Southland Tales), and Year Four had a mini series that's a sequel to the previous one and more individual crossover videos.
• Hero House: May be one of the most ambitious examples, featuring characters from comics, video games, manga and movies.
• The original The Ultimate Showdown of Ultimate Destiny flash video. Good guys; bad guys; explosions as far as the eye can see. Way too many pop culture icons to count.
• Symphony Of The Blood, a fake video game crossover between all the characters of the Star System of Osamu Tezuka.
• The Slender Man Mythos stories tends to have the blogs mix together. For example, M of The Tutorial regularly participates in Damien's blog, Dreams in Darkness.
• John C. Wright has come up with a campaign setting (further down the page; search for "multiverse game") which revolves around "anything goes", and incorporates roughly a billion various setting and universes (including the Cthulhu Mythos, The Chronicles of Amber, Doctor Who, Lord of the Rings, etc.) into one complex setting rife with secret societies and inter-universal conflicts. As the author puts it:

  In case this is unclear, this is a total ‘kitchen sink’ campaign, where anything and everything can be thrown into the mix, and the players can pick anything they want to play. There are no restrictions on race, class, type, powers, or anything.

• WarpZone Project happens in a world where all fiction is actually piece of earth's true history, which implies this trope coming into play.
• Monsters of the Web (Formerly Ask Ticci Toby) by Team Rammyz is a Massive Multiplayer Crossover between popular Slenderverse and Creepypasta characters. So far the series has introduced Slenderman, Ticci Toby, Hoodie and Masky from Marble Hornets, Kate the Chaser from Slender The Arrival, Eyless Jack, Clockwork, Jeff the Killer, Homicidal Liu, Ben Drowned, Jane the Killer and Laughing Jack with future plans to include Zalgo, Bloody Painter, The Puppeteer, Hobo Heart, The Rake, Jason the Toy Maker and even Lazari from the fancomic I Eat Pasta For Breakfast.
• Monster Island Buddies: Not only do we get characters of the Godzilla franchise and many other kaiju films. Plenty of other fictional celebrities show up on a regular basis, ranging from Anime and Video Games, comics and other movies, to even the Disney Animated Canon. Some play prominent roles, such as Mr. Fantastic but most are usually cameos.
• Vinny's Tomodachi Life streams feature quite a cast, including Peach, Bowser, Toad, Tingle, CDi Link, Lolly, Little Mac, Gabe Newell, Gordon Ramsay, Seabiscuit, a Klingon (In Name Only), and David Bowie.
• Hobo Bros: The "Hobo Theatre" videos often use characters and items from a variety of video games and other works. For example, "Not Just Another Order" includes Big Smoke, Luigi, Kabu, John Cena, and Goofy, among others. Justified in that these videos are made using Garry's Mod, which was specifically designed to incorporate all these elements and allow for crossovers like this.
• The poster "Universe: 113" by the artist Egor Klyuchnyk depicts a huge structure inhabited by lots of different characters from games, cartoons and movies.
• In 2019, in the Comics and Cartoons board of 4chan, a webcomic named Let's Make a Comic! was released, which was the result of many comments building a story.
• The Cracked article This Shared Universe Isn't a Theory, It's Real postulates a single shared universe through 18 different crossovers, from Batman to The Smurfs, and honestly the route is even more circuitous than it sounds like it needs to be to connect those two. While this universe presumably isn't canon anywhere else, it appears in this article itself. It also specifically mentions a lot of different characters in this universe, since the chain mostly proceeds by the logic of character X having met character Y.

• I'm a Marvel... And I'm a DC has action figures from both universes mingling together with some wacky hijinks.
• The skits of Joeybar have included characters from — but not at all limited to — Regular Show, Smiling Friends, Breaking Bad, SpongeBob SquarePants, Puss in Boots: The Last Wish, Steven Universe, South Park, Family Guy, The Amazing Digital Circus, Blood Meridian, Hazbin Hotel, I Have No Mouth, and I Must Scream, and Class of '09, all interacting at the suggestion of user comments.
• Sonic Stopmotion Adventures mainly uses Sonic characters but it is not rare to see others from various franchises in some episodes.

• Captain Laserhawk: A Blood Dragon Remix is primarily inspired by the setting of Far Cry 3: Blood Dragon but features a vast array of characters and concepts from Ubisoft's entire lineup of video game franchises and combines them into one unified setting, including Beyond Good & Evil, Watch_Dogs, Splinter Cell, Assassin's Creed, and Rayman.
• Disney has a long history of putting loads of their characters in the same universe. The most famous animated example would have to be House of Mouse, which sees Mickey Mouse and his friends as hosts of a nightclub venue, with characters from Disney's animated features as the audience.
  • Speaking of Disney, their Chibi Tiny Tales and Chibiverse cartoons feature Super-Deformed versions of characters from their movies, cartoons, and live action shows interacting with one other, ranging from Phineas and Ferb and The Owl House to Halloweentown (1998) and High School Musical.
  • For the 100th anniversary of the company, they reached the absolute apex with Once Upon a Studio which features characters from all the animated features in the Disney Animated Canon, along with characters from their various shorts and TV specials and even a handful of animated characters from their live-action films like the Penguins from Mary Poppins and Elliot from Pete's Dragon (1977).
  • A recent remake of the short called Once Upon a Studio: Version 2.0 takes this even further, and shows Moana's father returning (voiced once again by Temuera Morrison), cameos by the Spring Sprite and Yo-Yo Flamingo from Fantasia 2000, and even Mufasa in ghost form.
• Many classic Hanna-Barbera characters have been used across the board, in shows like Laff-A-Lympics and Yogi's Gang; this is still done, but with a more satirical bent (e.g., Harvey Birdman, Attorney at Law). The largest gathering of characters, however, came with the Hanna-Barbera 50th anniversary special in 1989 as all the characters gather together to pay tribute. This doubles as Roger Rabbit Effect as they interact with Joe and Bill themselves, along with special hosts Tony Danza and Annie Potts.
• Nearly all recent Warner Bros. animated television series made references and overt cameos with one another.
• The early-1990s public service announcement Cartoon All-Stars to the Rescue had characters like the Teenage Mutant Ninja Turtles, The Smurfs, Winnie the Pooh, the cast of DuckTales, and many others team up to teach a single kid about the dangers of drugs and save his sister from same. Although, if you can see Smurfs, there's a good chance that you're tripping balls already.
• The 1980s cartoon Defenders of the Earth starred King Features' most famous adventure-hero characters: Flash Gordon, The Phantom, and Mandrake the Magician (along with his sidekick, the strongman Lothar).
• Much earlier, in 1972, the one-off animated special The Man Who Hated Laughter united all of King Features' popular characters — meaning not only Flash, the Phantom, Mandrake, and Lothar, but also the likes of Popeye, Blondie (1930), Snuffy Smith, and Beetle Bailey.
• Captain N: The Game Master featured a mishmash of characters who appeared on the Nintendo Entertainment System done wrong. Most of the episodes took place in the neutral Videoland, with characters like Simon Belmont, Mega Man (Classic) and Pit hanging around, even if In Name Only. Link and Zelda from The Legend of Zelda (cartoon) appeared too.
• The Children in Need music video "Peter Kay's Animated All-Star Band", which features nearly every significant British Stop Motion characters with a few 2D British and American characters broadcast "live via satellite", including Roary the Racing Car, Fifi and the Flowertots, The Wombles, In the Night Garden..., Angelina Ballerina, Scooby-Doo, Bagpuss, Bob the Builder, Ben 10, Thunderbirds, Postman Pat, Spongebob Squarepants, Fireman Sam, Camberwick Green, Thomas & Friends, Pingu, Teletubbies, The Sooty Show, The Koala Brothers, Peppa Pig, Rubbadubbers, and Paddington amongst others.
  • All singing parts of the characters by their original voice actors. The video took two years to produce, and it's for charity.
• Done with advertising mascots in the short film Logorama. It won the 2009 Oscar for Best Animated Short.
• The Rosey And Buddy Show, a 1992 TV special produced by Nelvana, featured not only animated versions of Roseanne and Tom Arnold, but also the Care Bears, Beetlejuice, Tom And Jerry, Droopy and even Wile E. Coyote's stunt double.
• Aardman Animations made a Google Chrome commercial for Christmas 2012 that featured Wallace & Gromit making a conference call with Ginger, Captain Cuddlepuss and Trixie, the robins, Shaun's flock, and Piella and Fluffles.
• The Uncle Grandpa short "The Grampies" is an award show for Cartoon Network stars be they from classic shows like Dexter's Laboratory, Johnny Bravo and Foster's Home for Imaginary Friends, or currently airing shows like Regular Show and The Amazing World of Gumball. There were even voiced cameos from Steven Universe, Jake the Dog, Belson, and Reboot!Buttercup, mostly complaining about how Uncle Grandpa is winning every award.
• The OK K.O.! Let's Be Heroes episode "Crossover Nexus" has K.O. team up with Ben 10, Garnet, and Go!Raven to take down the villain Strike, who has been taking down heroes from across the Cartoon Network multiverse. This includes, but is not limited to: Hi Hi Puffy AmiYumi, Sym-Bionic Titan, Dexter's Laboratory, I Am Weasel, Mighty Magiswords, The Amazing World of Gumball, Uncle Grandpa, Secret Mountain Fort Awesome, Regular Show, Adventure Time, The Grim Adventures of Billy & Mandy, Chowder, Time Squad, Foster's Home for Imaginary Friends, Ed, Edd n Eddy, Whatever Happened to... Robot Jones?, Courage the Cowardly Dog, Sheep in the Big City, We Bare Bears, My Gym Partner's a Monkey, Squirrel Boy, The Marvelous Misadventures of Flapjack, Apple & Onion, Craig of the Creek, Clarence, Over the Garden Wall, The Powerpuff Girls, Cow and Chicken, Codename: Kids Next Door, Camp Lazlo, Johnny Bravo, Summer Camp Island, Generator Rex, The Life and Times of Juniper Lee, Evil Con Carne, Megas XLR and even The Moxy Show.
• Animaniacs (2020) does this with reuniting the Looney Tunes, the Tiny Toons, characters from Hanna-Barbera and ever-flippin' Loonatics.
• [adult swim], in 2003, had a New Year's Eve special that united all of their original properties at the time for a series of crossover shorts called "The Bashingtons" with the framing device of Brak's family from The Brak Show inviting all the other [adult swim] characters over for a New Year's Eve party. However, it ended with The Brak Show being officially canceled and Brak naturally being rather upset about it. The last bumper was Brak crying about being canceled as George Lowe (the voice actor for "Dad") complains about his inability to find work.
• The Fantastic Funnies was a one-hour special showcasing the most American popular newspaper comics from the 1920s til the 1970s. While it was mostly a documentary that showed how comics were made behind the scenes and the impact these comics had on American culture, there was also a small skit that had hostess Loni Anderson interacting with the protagonists of Peanuts, Wee Pals, Dennis the Menace (US), Nancy, Little Orphan Annie, Blondie (1930), Dick Tracy, Snuffy Smith, Alley Oop, Prince Valiant, Pogo, Tumbleweeds, Miss Peach, B.C., BeetleBailey, Doonesbury, Broom Hilda, Drabble, Cathy, Hägar the Horrible, Fred Basset, Marmaduke, and "newcomer" Garfield.
• Harvey Street Kids is this for the kid heroes owned by Harvey Comics, such as having Audrey, Lotta, and Dot as the lead characters, and Richie Rich as a supporting character, as they have their adventures within the same setting. Even Casper the Friendly Ghost gets to make an appearance.