Intercontinuity Crossover - TV Tropes

• Dr. Slump made another crossover appearance in Dragon Ball Super, with a bit of Leaning on the Fourth Wall by Vegeta of all characters, as he notes that his usual fighting style won't work against a Gag Series character like Arale. There was also an earlier cameo by Arale in the episode where, due to suffering from temporary Power Incontinence, Goku couldn't properly control his Instant Transmission, and ended up back in Penguin Village for a few seconds.
• Toriyama already did that in Dr. Slump itself: there was one chapter where the characters traveled to Wonder Island, the set of the titular manga (and Toriyama's very first published work).

• That the author of Flunk Punk Rumble's favorite author happens to be the author of Fairy Tail probably helped, as well a former assistant of his. What's most stunning of all is that despite being SERIOUSLY WTF, it actually ain't half bad.
• Fairy Tail also had a crossover with the story Mashima wrote before it, Rave Master. The Jiggle Butt gang appeared in the anime as well.

• Most notable is the crossover with Detective Conan, which was a big enough deal to warrant both a TV special and a theatrical film.
• Lupin III had a one-shot crossover with Kochikame as part of the latter's Milestone Celebration (which also included crossovers with Dragon Ball Z, Golgo 13, Kinnikuman and more). The Lupin III segment ended with the revelation that Ryotsu, Reiko, Nakagawa and Chief Ohara had all been tied up and replaced by the Lupin gang.
• 2023 saw the release of a crossover film with fellow heist series Cat's Eye as a Prime Video exclusive.

• At one of the Jump Fiesta events they featured another crossover of Luffy and Goku going up against Eneru above the city of Tokyo. Other characters get short cameo and Ryotsu of Kochikame made an appearance (as seen here). They would later do this again only this time against Arlong and Astro Boy was thrown into the mix.
• The inaugural One Piece Premier Summer event in 2007 at Universal Studios Japan and its annual takeover of the Waterworld: A Live Sea War Spectacular stage actually began with a show where the Straw Hats found themselves on the Atoll and battled a Villain Team-Up of the Deacon and Buggy.

• Gintama and Sket Dance had a crossover chapter for each manga, and two corresponding crossover episodes.
• Toriko and One Piece had two crossover episodes (one of which was adapted from a manga crossover).
• Later on, One Piece, Toriko, and Dragon Ball Z had a crossover episode entitled Dream 9: Super Collaboration Special!!, though it obviously had no bearing on the continuity of any of the anime involved. It does reference their previous crossovers by having Toriko and Luffy recognize each other; however, they have no idea who this Goku character is...

• An interesting example: X-Men and Teen Titans◊. Starfire learns languages by kissing people, and Nightcrawler thinks that's terrific.
• An unfortunate side-effect of this is that the closest Jubilee has ever come to a serious relationship is with a guy who lives in another universe.
• JLA/Avengers is considered canon (or at least was before the New 52), with the "Syndicate Rules" arc in JLA and the later Trinity maxi-series both acting as sequels of sorts. However, thanks to trademark issues, the Avengers themselves could not be mentioned in either follow-up, even though the incident where they teamed up with the League was vaguely alluded to.
• John Byrne's Batman/Captain America crossover takes an interesting turn by setting it in The '40s with the Lighter and Softer versions of both characters (though it's more World War II enthusiasm, since both characters also embody Good Is Not Soft in the comic), with an epilogue taking place in the sixties, with some Mythology Gags tossed in. (It's also apparently in continuity with Superman & Batman: Generations, although as above, Cap is never mentioned directly in that book.)
• Played with in Doomsday Clock (2017) when Dr. Manhattan forsees a "Secret Crisis" in 2030 between Superman and "Thor himself... and a green behemoth stronger than even Doomsday, who dies protecting Superman from these invaders."

• Judge Dredd has teamed up with Batman on at least three occasions; given Bats' vigilante status and Dredd's fascist asshole status, there was some distinctly Teeth-Clenched Teamwork on both sides. Dredd has taken on Aliens and the Predator as well. And in 2000 AD publications themselves, Dredd has crossed paths with Johnny Alpha from Strontium Dog twice (Both of these strips have been created by the same people) and has seen a whole score of cameos from outside characters during the Helter Skelter story arc.
• The protagonist of the Fiends of the Eastern Front prequel 1812 is none other than Armand d'Hubert from The Duellists.

• Punisher met Batman in two one-shot comics: Lake of Fire, where he worked with the post-Knightfall version of the character (Jean-Paul Valley, aka Azrael), and Deadly Knights, where he got a less warm welcome from the original one, Bruce Wayne. One highlight of the second crossover is the Joker having an Oh, Crap! moment when he realizes that Frank really will kill him; of course he doesn't because of Joker Immunity but it is still hilarious. The first crossover even got mentioned at the start of KnightsEnd, as Azrael namedrops Jigsaw.
• Punisher was featured in one of the single most bizarre intercontinuity crossovers, ever: Archie Meets the Punisher. The story ends with a joking tease for a future crossover between Jughead and Wolverine. The Archie EIC at the time admitted the comic came about from him randomly meeting some Marvel guys at a cafe and talking.

• Not only has Sonic met those groups, he's also encountered Sabrina the Teenage Witch a few times. However, because of how Sonic's treated, all of their encounters are considered non-canon.

• The Neo-Knights, a team of superheroes which included Circuit Breaker, would've gotten their own Marvel Universe series had Simon Furman had his way (he even teased the plans for their series in the letters column of the final issue of The Transformers (Marvel)). The new series would've Retconned the Transformers series as a training simulation for the team to prepare for "real" robot threats.
• A company crossover between IDW and Marvel did have the New Avengers and Autobots team up. It's considered ambiguously canon by IDW.
• They also, naturally, had crossovers with their G.I. Joe comic, to the point that in the "Generation 2" series, they all but merged, albeit not without a touch of Continuity Snarl in the process (and they effectively de-merged anyway, as the G2 book proceeded to devastate much of the Earth, something which didn't happen in the G.I. Joe book). Years later, nearly anybody with the license will consider making their own version of the crossover, notably Dreamwave's alternate universe which is set during World War II, and Devil's Due's multiple mini-series, which is actually referenced in the Titanium Series toyline as well as a Subscription Service-exclusive toy. As of Revolution (2016), the current IDW continuity now crosses both franchises over with several other Hasbro-owned properties, two of which (Rom: Spaceknight and Micronauts) were also previously published by Marvel (and integrated into the Marvel Universe at the time).
• IDW also published a crossover between G.I. Joe and Street Fighter.
• IDW's Transformers: Regeneration One, a continuation of the original Marvel series, revealed the existence of the Transformers Multiverse to Hot Rod, and in the climactic battle occurring in the final issue has several of Hot Rod's multiversal counterparts show up in Zero Space to help him.

  IDW Rodimus: Anyone without a "Hot" or a "Rod" in their name, give 'em a real hard time.

• IDW eventually published Transformers/Ghostbusters, a crossover that features a unique take on the Transformers within the IDW Ghostbusters universe.

• Usagi Yojimbo's appearance in several episodes of both initial TMNT cartoons. Playmates Toys' TMNT toy line even had an action figure for him at one point.
• When Archie Comics had the license, a crossover with the Riverdale gang was inevitable.
• The IDW Turtles cross over with the Ghostbusters and later Batman, in Batman/Teenage Mutant Ninja Turtles, as well as Street Fighter in Teenage Mutant Ninja Turtles vs. Street Fighter. There was also Teenage Mutant Ninja Turtles x Naruto in which they lived in the Naruto universe.

• 1997's JLA (1997)/WildCATS by Grant Morrison.
• 2000's JLA (1997)/Witchblade.
• 2001's JLA Versus Predator.
• 2005's JLA/Cyberforce.
• There was a six issue JLA/The 99 miniseries from 2010.
• 2019 saw a crossover between the Justice League and Dark Horse's Black Hammer.

they can do a double-take

• Ladies and gentleman, the entire comic was leading up to that. That was the whole reason for this thing.
• This was followed by a Star Trek: The Next Generation/X-Men crossover that was a sequel to both the first crossover and to Star Trek: First Contact, and that crossover was continued in a novel.

• Asking yourself just how he became so powerful, aren't you? Answer: He's got ''Q'' trapped.
• DC and IDW also collaborated on a Star Trek/Green Lantern crossover, which was successful enough to warrant a sequel. The sequel revolves around the Enterprise crew accidentally finding six rings on the remains of Mogo, leading to Uhura becoming a Star Sapphire, Chekov becoming a Blue Lantern, Bones becoming a member of the Indigo Tribe and a vengeful Khan becoming a Red Lantern.

Aahz: That was our introduction to…the Law Machine. We were all dimensional travelers...I haven't seen a Law Machine before or since.

• To make it even more confusing, Ultimate Spider-Man had a crossover with Jessie, which is a live-action comedy series on Disney Channel.

• My Little Pony Generations is a crossover between the first and fourth generations of My Little Pony, which occur in separate continuities.
• My Little Pony/Transformers: Friendship in Disguise! is a crossover between My Little Pony: Friendship Is Magic and The Transformers.

Edward Elric

Chrono Harlaown

Grimlock

• And Shirou EMIya (partial caps intentional) of Fate/stay night in The Hill of Swords.
• Also, Jack Ryan in Zero's Shock and ALEX FREAKING MERCER in Unfamiliar.
• And then there's A Green Sun Illuminates the Void, an Exalted crossover where, after failing to summon a familiar, Louise is Exalted as a Green Sun Princess...

The Project

• A less serious take on the concept is S.O.L., which at least has less OOC on the MST3K side (The author even mentions The Project in their note).

• In fact, due to the popularity of Friendship is Magic, and very prolific fanfic writers, My Little Pony: Friendship is Magic has crossed over with just about everything, from The Dresden Files to Stargate SG-1.

• And by the same author, Respect, crossing over Madoka with Smile PreCure!.
• Also by the same author, Shattered Skies: The Morning Lights, crossing over Sailor Moon, Cardcaptor Sakura, the first ten Pretty Cure continuities, Lyrical Nanoha, and Madoka Magica.

• DreamWorks Animation does this from time to time, mainly with characters from Shrek, Kung Fu Panda, and Madagascar.
• Pixar used to do this in their bloopers and credits.
• Laika normally does this to celebrate holidays.
• Illumination Entertainment does this more often than you'd expect, from pairing up the Minions with characters from other franchises to bringing them all together, in their marketing and logos.

• Interestingly, there's an episode of Homicide in which Munch refers to people "watching The X-Files." You could take this as a paradox, or you could figure that Munch — a hard-core conspiracy theorist — leaped at the chance to play himself in an X-Files episode. Which might explain why the interrogation room in that X-Files ep looked completely different from the interrogation room in Homicide.
• There is uncertainty over whether Belzer appears as Munch on The Wire; the character was not named and received a generic billing. He mentioned that he used to own a bar, however, which he did in Homicide, so there's some evidence that it was intended to be Munch.
• Taken even further with Luther, in which the titular character tells a subordinate to check out an American felon by sending their profiles to Munch in New York. Celebrity Paradox kicks in, considering that the London cop John Luther and Baltimore gangster Stringer Bell in The Wire are both played by Idris Elba.

• The Doctor and Rose showed up for a panel of Buffy Season 8, which means that aliens and demons may (if it's canon) exist in the same universe.
• The Doctor Who/EastEnders crossover (of very dubious quality, but it was for charity) Dimensions in Time could also be mentioned, although it's actually not in either of the shows' continuities (and indeed, since then they've both featured each other as fictional programmes).
• The Kaldor City Doctor Who Expanded Universe audio dramas written by Chris Boucher and produced by Magic Bullet are set in the titular city from the Doctor Who story The Robots of Death (also by Boucher), but feature Scott Fredericks reprising the role of Psychostrategist Carnell from the Blake's 7 story "Weapon" (also by Boucher). A History by Lance Parkin (an exhaustive unofficial history of the Whoniverse) makes a valiant attempt to claim that B7 may well be set in the Whoniverse, but really it's probably best to assume he's an Alternate Universe counterpart. Or just don't worry about it. (There's also a cynical manipulator played by Paul "Avon" Darrow, who knows more about Carnell's Federation background than the Kaldorians, but let's not even get started on that...)
• Similarly, back in the heyday of Marvel Comics' British arm, there were several crossovers between the Doctor Who Expanded Universe (or at least the DWM comics branch of it) and the Marvel Universe. The first and most notable was the Special Executive, a Time Travelling Ragtag Bunch of Misfits created by Alan Moore. Originally introduced in DWM as ancient Gallifrey's Special Ops, they later appeared in Moore's Captain Britain, where they were mercenaries.
• Marvel also linked Doctor Who with Transformers, by way of bounty hunter (sorry, "freelance peacekeeping agent") Death's Head. This is a borderline case, however, as the link only occurred when Death's Head fell through a dimensional rift from the Marvel UK Transformers universe and ran into the Doctor as a result.
  • In a more solid (possibly) example, the obscure character Octus has been stated to have a Dalek altmode. He was never seen transformed, but Word of God says that's what he turned into.
• Gallifrey itself... or rather what was left of it... shows up in the Power Rangers Lost Galaxy episode Green Courage with Coordinates to boot,◊ This aired in 1999, six years before the new series, by the way.

• On the other side of the Pacific, the world of the Samurai Sentai Shinkenger had an unexpected visitor in Kamen Rider Decade. The crossover is in continuity for both shows; in fact, the fact that the Shinkenger world is the only world in Decade that is the genuine, canonical universe of the show in question rather than an Alternate Universe (original worlds aside) is a plot point for the arc. ^note 
  • Ultraman vs. Kamen Rider is actually more of a team-up special than a fight with the protagonists being portrayed by Fake Shemps, but still awesome.
  • Super Hero Wars: Kamen Rider vs. Super Sentai brings together 240 heroes across both franchises, and once again Decade is involved.
  • Kamen Rider Gaim had a canonical, hour-long crossover with Ressha Sentai ToQger. Unlike the previous examples, which were usually regulated to movies, this one actually aired on television as part of the series proper. Gaim was also involved in a later crossover with Kikaider.

• One episode of Mad About You itself revealed that Paul's old apartment was being loaned to Kramer from Seinfeld.
  • And later it was revealed that the series Mad About You exists in the Seinfeld universe. Maybe it's a reality show?
• Another Mad About You episode had Carl Reiner guest star as Alan Brady, his character from The Dick Van Dyke Show. This created a bit of a paradox, because in an episode of Friends (which would seem to be in the same "universe") the characters are shown watching ''The Dick Van Dyke Show".
  • Not as much as you might think: The actual DVD show ended with Rob Petrie trying to find a buyer for his life story, and Alan Brady hinting that he might want to turn it into a show, which is so meta it hurts. So, it's possible that, in the fictional world where Rob, Laura, and Alan Brady live or lived alongside the Mad and Friends characters, Alan Brady eventually settled on Dick Van Dyke to play Rob Petrie — brain exploding must stop...
• Also, Chandler briefly appeared in a Caroline in the City episode, and Caroline briefly appeared in a Friends episode.
• Ross appeared in an episode of The Single Guy, playing an old schoolmate of Jonathan's.
• Daphne and Niles of Frasier were on an episode of Caroline in the City, too, so that links Frasier (and, by extension, Cheers) into this little sitcom world, too.
  • And since Cheers linked itself to St. Elsewhere, that drags all of 1990s Must See TV into the autistic kid's dream.
• Some people Fan Wank Greg House into the series as the passenger that tells Rachel off on her flight to England due to neither caring about the feelings of a nearby person and both being played by Hugh Laurie. Depite the fact Laurie clearly isn't playing the character as American.

• JAG's Lt. Bud Roberts did appear in the first season NCIS episode Hung Out to Dry.
• Meanwhile, Lt. Cmdr. Faith Coleman and a Navy SEAL played by Adam Baldwin appeared on both series.

• Lost has also featured a few shoutouts to Alias, though it's unlikely they exist in the same universe due to Terry O'Quinn's characters in both shows being completely unrelated.
  • Actually, they do exist in the same universe, as a CIA agent is shown listening to one-hit wonder Drive Shaft, "You All Everybody", on his workstation. Ergo, Charlie Pace (played by Dominic Monaghan) is part of the Aliasverse, meaning LOST is part of it as well.
  • Likewise, an Oceanic Airlines flight to Sydney was mentioned in passing on Alias.
  • An Oceanic Airlines ad also appeared during the pilot episode of Flash Forward.
  • The disappearance of Oceanic Flight 815 was mentioned in passing on Fringe.
  • This could be because Oceanic Airlines is a generic name that a lot of shows use. The Other Wiki has details.
• Also, the big "cork" on the bottle of evil at the end of the show pretty closely resembles a Hellmouth. Probably not intentional, but wouldn't it explain everything?

• But wouldn't that put the Disney Theme Parks and Sesame Street in the same universe as well?
  • Yes. But as we know, everything exists in Tommy Westphall's mind anyway!

• In one LV episode, Mary made a reference to booking a conference room for Dunder-Mifflin, and Heroes and the 2008 Knight Rider series have both made references. Linderman being involved would certainly explain the Montecito's high owner turnover rate. Don't combine it with the Lost bit above, though, or your head might explode.

• As for the styles of the shows not meshing, in the Hornet's "window gag" appearance (the earlier of the two appearances), Batman and Robin acknowledge his and Kato's status as heroes. In the later guest appearance, the episodes run with the standard "on police records a wanted criminal" plot device of the Green Hornet property, and entangle the Hornet/Kato and Batman/Robin in a Let's You and Him Fight standoff.
• Later episodes would have Batman and Robin meet Colonel Klink from Hogan's Heroes or Lurch from The Addams Family in the window gag.

• CSI:
  • The "Mythbusters" appear in "The Theory of Everything". From the way the segment is filmed it's unclear whether they are intended to be fictional lab-techs, "themselves" visiting the lab, or a figment of Nick's imagination. However they later tested the same theory on Mythbusters, using clips from the CSI episode.
  • CSI once shares a rather odd crossover with the sitcom (and fellow CBS hit series) Two and a Half Men: they swapped writers. The "Men" team wrote "Two and a Half Deaths" about a murder on the set of a sit-com in which a rubber chicken is used as a murder weapon. Meanwhile the "CSI" team wrote one for them called "Fish in a Drawer" parodying the CSI process when a body is found in Charlie's bed.
  • The series did a two-part crossover with Without a Trace. Jack Malone from the FBI's missing persons unit chases a lead to Vegas in CSI's "Who & What" and takes Gil Grissom back with him in his show's "Where & Why".
• CSI: NY crosses over with Cold Case when Philadelphia Det. Scotty Valens shows up to question Det. Stella Bonasera about a case that connects to her in "Cold Reveal."

• 1997's Prime Cracker, in which Fitz and DCI Tennyson hook up and decide that now they have a relationship they don't care who the killer is.
• 1997 also had BallykissDibley, in which Geraldine desperately tried to convince a visiting Father Peter that her parishioners were normal.
• 2009's When Janet Met Michelle, which combined all BBC Three's sitcoms about twentysomethings, as the cast of Two Pints of Lager and a Packet of Crisps invited characters from Grownups and Coming of Age to their fundraiser party. The title refers to the characters played by Sheridan Smith in Two Pints and Grownups, who did indeed meet.
• One between The Catherine Tate Show and Doctor Who (with a bit of Recursive Canon).
• In 2013, a skit with the 1950s midwives from Call the Midwife inexplicably in a modern maternity ward got even more bizarre when the increasingly exasperated father called for a doctor, and the TARDIS materialised.

• And Ned mentions the Happy Time Temp Agency by name, so Pushing Daisies and Dead Like Me exist in the same universe as Wonderfalls, which makes the Celebrity Paradox even more fun, because Jewel Staite plays a to-be-reaped record store employee in Dead Like Me, and then later played Jay's boyfriend's ex-wife in Wonderfalls.
• Now Hannibal is part of the continuity. Gretchen Speck (she dropped the Horowitz in the divorce, apparently), from Wonderfalls, is in Hannibal, and played by the same actress. (And in Bryan Fuller fashion, Celebrity Paradox kicks in, because Caroline Dhavernas is in both.)

• It also includes Sketch Comedy shows All That and The Amanda Show.
• It also includes Yo Gabba Gabba! which had crossovers with Big Time Rush and True Jackson, VP.
• Carlton Banks from The Fresh Prince of Bel-Air shows up in an episode of Big Time Rush, which puts the entire Nick Verse into the St. Elsewhere "It Was All A Dream" continuity.
  • Actually, that character wasn't actually Carlton, as the character's named Captain McAllister. And, even then, there are continuity problems elsewhere. Drake Bell appeared as himself in an episode of Zoey 101, not Drake Parker, and Drake & Josh was shown to be a TV show in episodes of iCarly and Victorious, but characters from each later appeared on iCarly. Not only that, but Miranda Cosgrove appeared as herself in the Christmas special of Big Time Rush, pretty much signifying those aren't in that continuity.

• This became a trend when Niecy appeared on Girlfriends and Maya appeared on Moesha as the aunt of Dorian's stepsiblings.
  • The character Peaches from Girlfriends made an appearance on Eve (2003). Taking all the connecting shows into account, Brandy has masqueraded as no less than four people in the UPN-verse: Moesha, herself, Chardonnay (The Game (2006), spinoff of Girlfriends), and a mystery caller on Sabrina, the Teenage Witch (which crossed over with Clueless).

• After his show was canceled by NBC, Matt Ryan guest starred as John Constantine in Arrow Season 4, which not only takes place in a different canon, but also a different network. The CW intended the crossover to be a prelude to Constantine joining the Arrowverse, but rights issues prevented Constantine from appearing again until two years later, when he guest starred in Legends of Tomorrow Season 3; it wasn't until Season 4 that the creators found a way to integrate him as a cast member.
• Supergirl, originally an unrelated show on CBS, had Grant Gustin crossing over as Barry Allen from the 2014 Flash show for its 18th episode. When the show was greenlit for a second season, CBS passed it over to its sister channel The CW because of budgetary reasons. Since then, the series has transitioned well to the Arrowverse, joining its annual Crisis Crossover.
• The Elseworlds crossover event had John Wesley Shipp reprise his role as Barry Allen from the short-lived 1990 Flash series that aired on CBS.
• Crisis on Infinite Earths is the biggest instance of this in the 'verse. Not only did it bring Black Lightning (2018) into the Arrowverse, it also featured many actors who had played, or were playing, characters from unrelated DC media. And, with the exception of the Titans (2018) and Doom Patrol (2019) whose archive footage were used instead, they actually did appear this one time to reprise their roles. These included the 1989-97 Batman films (courtesy of Robert Wuhl as Alexander Knox), the 1960s Batman series (Burt Ward as Dick Grayson), Smallville (Tom Welling and Erica Durance as Clark Kent and Lois Lane), Superman Returns (Brandon Routh as Clark Kent), Birds of Prey (Ashley Scott and Dina Meyer as Helena Wayne and Barbara Gordon), Lucifer (Tom Ellis as Lucifer Morningstar), and the DC Extended Universe (Ezra Miller as Barry Allen), in addition to the aforementioned 1990 Barry Allen. It also marked the debut of the would-be Justice Society of America from Stargirl, which started streaming on DC Universe several months after the crossover event.
• Humorously subverted with the Legends of Tomorrow episode "Zari, Not Zari". The promos indicated that the episode would somehow cross the show over with Supernatural, which was ongoing on The CW at the time but had absolutely no connection with DC Comics whatsoever. Indeed, it didn't; the Legends merely visited the show's set in Vancouver (they even saw Baby!), in one of the most blatant Leaning on the Fourth Wall moments known to man.

• Fantasmic! has many of the Disney Villains team up to take down Mickey.
• The Great Movie Ride at Disney's Hollywood Studios had both The Man With No Name and Ethan Edwards together in one scene.
• The Redwood Creek Challenge Trail in Disney California Adventure has references to the events of Brother Bear, and shows featuring Russell and Dug and Pocahontas.

• Beetlejuice's Graveyard Revue has the title character meeting the Universal Classic Monsters.
• The pre-show for Kung Fu Panda Adventure shows Po interacting with Shrek, Donkey, Gingy, Marty, and Princess Poppy. Said attraction is set inside the DreamWorks theatre, which itself is interchangeable to feature attractions based on other DreamWorks films/franchises.
• The former StreetBusters show had the Ghostbusters battling against Betelgeuse.

• SQUUEEEEEEEEEE-- Oh, excuse me!
• G.I.Joe's original intercontinuity crossover character, WWF wrestler Sgt. Slaughter.
• Hasbro has also done G.I. Joe action figures for Rocky Balboa and William "The Refrigerator" Perry as team trainers. The Rocky figure was canceled, however, when another company picked up the toy license for Rambo before Hasbro could finalize the likeness rights for Sylvester Stallone.
• And also G.I. Joe action figures for Street Fighter II. In fact, it was there when Ken got his last name, Masters, because they couldn't name an action figure just "Ken" thanks to Barbie.
• G.I. Joe and Transformers cross over in an unreleased Transformers: Generation 2 era transforming G.I. Joe Armored Personnel Carrier, an unreleased Baroness & Ravage statue, and the G.I. Joe and the Transformers San Diego Comic-Con and Collector's Club exclusives, including the reappearance of Old Snake. The Transformers: Generations Combiner Wars Decepticon Viper transforms into a Cobra Rattler jet and has a combined Cobra/Decepticon insignia.
• In Action Force #17, "Meditations in Red", Marvel hero and occasional Avenger Shang-Chi is revealed to have trained Quick Kick of Action Force, Lee Ho Ito, a different character than MacArthur S. Ito, Quick Kick of G.I. Joe. Action Force and Transformers UK cross over in "Ancient Relics!", and archaeologist Susan Hoffman appears in two later Transformers UK stories.

• Before even those toys came along there was the Animorphs Transformers line, which unfortunately didn't do well, mainly due to Kibbles and Bits hitting the line hard; it also was tying in with the equally bad TV series at the time.
• There's also the Disney Label ones, including "Mickey Prime" and a Bumblebee Donald Duck. Doesn't seem like these Disney crossovers will be coming to the US, though.

• The ending of Bomberman for the NES had Bomberman turning into the player character from Hudson Soft's NES version of Lode Runner.

• For that matter, the Super Robot Wars series itself is built on the idea of Mazinger Z and Shinji Ikari teaming up to beat up Char Aznable.
• Also notable in Super Robot Wars OG Saga: Endless Frontier, Reji and Xiaomu from Namco × Capcom confirm that KOS-MOS from Xenosaga comes from their future (which was already established in the former's game).

• Mortal Kombat vs. DC Universe, the title of which is pretty self-explanatory.
• DLC for Mortal Kombat 9 pits the MK cast against Freddy Krueger. The PS3 version also had Kratos from God of War as a Guest Fighter.
• Mortal Kombat X features Jason Voorhees, Leatherface, a Xenomorph, and a Predator as playable characters, though in a missed opportunity, Freddy is nowhere to be seen.
• Among the DLC kombatants of Mortal Kombat 11 are Spawn, the T-800, RoboCop, and Rambo.

• And then there's Final Fantasy Tactics, where you can send out other characters on jobs, and they may return having found the Big Bad's palace from Final Fantasy II, or the phantom train from Final Fantasy VI, or the fake Excalibur from Final Fantasy V.
  • The sidequest to get Cloud in your party. The PSP port of Tactics also included Balthier from Final Fantasy XII and Luso from Final Fantasy Tactics A2. In the case of Cloud too, it's suggested that his stint in Ivalice occurs when he fell into the Lifestream, hinting that it's the actual Cloud from Final Fantasy VII. Less so with Balthier and Luso, who are more or less there with no explanation. Lampshaded by Balthier himself even, who mentions that his role in the game... "feels more like a cameo role."

• "Disney" seems a bit unspecific, but that's because it's pretty much everything Disney owns.
• As of Dream Drop Distance, characters from The World Ends with You have started showing up, so now it's "anything Disney and potentially anything Square Enix owns."

• The sequel continues this, crossing Sam & Max: Freelance Police again (Sam this time, though Max still hangs around), The Venture Brothers (Brock Samson), Army of Darkness (Ash), Borderlands (Claptrap), and Portal (GLaDOS).

• Interesting crossover here, in the first game. Dante receives the sword named Alastor, imbued with an electrical motif. Later on in Viewtiful Joe, a character named Alastor appears, complete with the electrical motif and use of the exact same sword. (Multiple copies of it, in fact.) The connection is later made in the PS2 port of Viewtiful Joe in which Dante guest stars and Alastor (revealed to be the spirit of Dante's sword) harbors some unfriendly feelings towards Dante (for leaving him behind in Devil May Cry 2).
• After this, the connection is pushed forward in Tatsunoko vs. Capcom: Morrigan's win quote vs. Viewtiful Joe mentions that she was disappointed in him after talking to Alastor, leading to an implication that Darkstalkers, Devil May Cry, and Viewtiful Joe are all part of the same universe.
• Done again in Marvel vs. Capcom 3, where Dante and Joe's unique intro quotes for each other show the two to be friendly acquaintances. This would be odd, as Dante never actually ran into Joe in his Viewtiful Joe story, but he was playable in the PSP version of Viewtiful Joe: Red Hot Rumble.
  • Though non-canon, it should also be noted that Dante's story in Viewtiful Joe features Mundus, the Big Bad of DMC1, as the force behind Captain Blue's fall to villainy.
• Bayonetta, another Hideki Kamiya creation, drops numerous hints that it exists in the same world as Devil May Cry. This is particularly done through the use of Enzo, who has the same name and personality traits of an information broker who was pals with Dante and mentioned as early as the instruction manual for Devil May Cry, but the lore for one of the unlockable accessories, the Bracelet of Time (which is visually similar and functionally identical to the Bangle of Time from DMC1 ^note ), notes that it was created by Eva (Dante's Missing Mom), "a truly extraordinary [Umbra] witch" who "entered into contract with a legendary dark knight" (i.e. her husband Sparda). Additionally, Luka's father is a world-famous journalist well versed in the supernatural who goes by the name Antonio Redgrave. Dante's preferred alias in the DMC1 novel and The Animated Series? Tony Redgrave. When asked about the connection, Kamiya answered on his Twitter account that Dante respected Antonio and his work, so took the name during his early days as a demon hunter. Luka also name drops Claire, Trish, Silvia, and Ammy as girls he's dated in the past, but that's presumably a fun little nod to Kamiya's past works.

• Or as Valve put it, a patch to put Nolan North in Skyrim.

• Meanwhile, Senran Kagura: New Wave has crossed over with Drawgirls and UPPERS.
• And Senran Kagura Peach Beach Splash has, of all people, Neptune as a DLC character.

• The Legend of Zelda: Epona the peppy horse, Ganon the cranky pig, Medli the normal bird, and W.Link the smug wolf.
• Splatoon: Cece and Viché (normal and peppy squirrels who cosplay as Callie and Marie) and Inkwell the jock Octopus.
• Sanrio: Six characters that are inspired by Sanrio's various properties which include: Rilla the peppy Gorilla with a Hello Kitty theme, Chelsea the normal deer with a My Melody theme, Toby the smug rabbit with a Keroppi theme, Chai the peppy elephant with a Cinnamoroll theme, Marty the lazy cub with a Pompompurin theme, and Etoilie the normal sheep with a Little Twin Stars theme.
• And finally there's Felyne, a lazy cat who is a reference to the Felyne from Monster Hunter.

• Another guest strip by Bill Amend had Jason taking over 'PvP while Cole was away. Scott claimed that it was canon.

• Likewise with Grim Tales from Down Below, which has even more crossovers, such as The Grim Adventures of Billy & Mandy, Danny Phantom, The Nightmare Before Christmas, Spawn, etc. Yes, Bleedman just really likes doing these.

• Ghost Nappa has been in a duel and Atlantis.
• And seeing as he had a Poke Ball prior to his death, perhaps he also, at some point, visited another continuity.
• He's also been spotted in Death City.
• Since announcing the #CellGames presented by HETAP, Perfect Cell has been challenged by Yusuke Urameshi, Yami Yugi, Ken and Ryu, Sonic and Knuckles, Kenshiro, Light Yagami, and Saitama and Genos.

• The entire CN City era of on-air branding during the mid-2000s was based on this idea, with the characters of various Cartoon Network series (both originals and acquisitions) interacting within a metropolis compromised of elements from their various shows. In fact, most of the network's branding up until the 2010s had this in spades.
• According to the special The Grim Adventures of the Kids Next Door, The Grim Adventures of Billy & Mandy, Codename: Kids Next Door, Ed, Edd n Eddy, and The Powerpuff Girls all take place in the same universe.
• Since Dexter, Boy Genius has been sighted in Townsville, we can add his show to this list as well. Several superheroes, like Major Glory and Val Hallen, have also appeared in Powerpuff Girls episode "Members Only"; which also features Crossover Cameos of Space Ghost and Birdman. And same for Blue Falcon and Dynomutt.
• The Cartoon Network Invaded! crossover event followed an alien invasion that spanned episodes of Foster's Home for Imaginary Friends, Ed, Edd n Eddy, My Gym Partner's a Monkey, Camp Lazlo, and The Grim Adventures of Billy & Mandy, the latter series suggesting that certain characters from each series were in fact alien undercover agents.^note 
• TTG vs. PPG was a half-hour special crossing The Powerpuff Girls (2016) with Teen Titans Go!, kickstarted by Mojo Jojo teleporting himself to Jump City.
• Ace from The Powerpuff Girls became a member of the band Gorillaz during Stage 5. The band was also referenced as existing much earlier◊ during The Powerpuff Girls Movie.
• The episode "Say Uncle" had Uncle Grandpa crossover into the universe of Steven Universe, with a cheerful note that these events wouldn't be canon. The episode ends with Uncle Grandpa consulting a checklist of other Cartoon Network shows he's visited, including SWAT Kats.
• The OK K.O.! Let's Be Heroes episode "Crossover Nexus" had K.O. meet up with Ben 10, Garnet, and Raven. The episode notably includes cameos from almost every single CN original series, with the only two that didn't appear failing to do so due to time constraints.

several specials

• And, as a result, aliens are now Canon in Recess and The Proud Family... Which seems kinda odd, considering how relatively realistic their premises were. Though it does somewhat fit with The Proud Family's usual weirdness. Penny's great-aunt canonically has telekinetic powers and the movie was pretty wacky.
  • With Recess however, one episode has a story where a kid was believed to have been abducted by aliens. At the end of that episode, the aliens return him to school, and is worried he's late.
• And the fact that, by extension, American Dragon: Jake Long is set in the same universe as Lilo & Stitch, Kim Possible, and Recess has lots of strange implications...
  • It has definitely affected Lilo & Stitch, as later spin-offs show that the franchise takes place in a Science Fantasy universe instead of a mere children's sci-fi one.
• It's very confusing with Recess, as it's made explicitly clear in the series that it takes place over the course of the Fall of 1997 until the Summer of 1998 (and then Fall 1998 for Recess: Taking the Fifth Grade), even for the episodes made in the 2000s (this is firmly established in Recess: School's Out)

• In the episode "The Green Loontern", Dodgers gets his dry cleaning mixed up with Hal Jordan's and ends up as the newest Green Lantern when he finds the power ring in Jordan's uniform pocket.
• In the episode "Samurai Quack", Dodgers takes the place of Samurai Jack. Complete with Achoo, voiced by Mako himself.

• Homer's claim to having had a close encounter with an extraterrestrial is investigated by none other than Agents Scully and Mulder. The Agents asked if any of the following aliens are familiar: Marvin the Martian, ALF, Chewbacca, and Gort. Writer Mike Reiss described it as the "most illegal shot" in the show's history.
• In a move which infamously pissed off Groening, Jay Sherman from The Critic comes to help judge a film festival. An episode made after The Critic was canceled has Jay turn up again, this time confined to an insane asylum and only able to say his catchphrase, "It stinks!".
• Rick and Morty would later be in a Couch Gag in which they accidentally kill the family and have to remake them using Imported Alien Phlebotinum, only to create abominations with Rick's features due to Rick cleaning the tube containing their DNA with his own spit.

Gargoyles/ Spectacular Spider-Man crossover radio play

• There were also plans to do a crossover when it seemed there would be a series version of Atlantis: The Lost Empire, called Team Atlantis. Set in the '20's, it would have involved the Atlantis cast getting involved in a battle between Demona and a former Hunter.
• However, that hunter has reappeared in the comics, and Demona was seen grabbing something out of the remains of the Praying Gargoyle: an Atlantean crystal.

• The Secret Saturdays also appear in Ben 10: Omniverse.
• And a younger Generator Rex crosses over to the universe of the 2016 Ben 10 series.