History Main / InterContinuityCrossover

* ''WesternAnimation/TheMask'' and ''WesternAnimation/AceVentura'' met for two episodes, each one allocated in the second season finale of one of the series. Both shows kept their respective styles of animation in each other's universe (Ace and Spike, for example, kept their more cartoony look in the Mask's more realistic world and vice versa).

* WesternAnimation/TheMask and WesternAnimation/AceVentura met for two episodes that could have been awesome. Both shows kept their respective styles of animation in each other's universe (Ace and Spike, for example, kept their more cartoony look in the Mask's more realistic world and vice versa).
* Due to both characters being from Creator/ManOfActionStudios to begin with, ''WesternAnimation/GeneratorRex'' had a special episode named ''WesternAnimation/Ben10GeneratorRexHeroesUnited'', involving Rex meeting [[WesternAnimation/Ben10 Ben Tennyson]] (the ''[[WesternAnimation/Ben10UltimateAlien Ultimate Alien]]'' incarnation). A rare canon example, as it reveals more about Rex's backstory and provided Ben with a new alien form that actually made it to the next sequel series.
** The Secret Saturdays appear in Ben 10 Omniverse. And a younger Generator Rex crosses over to the universe of Ben 10 (2016).

* More interesting hints at Capcom's [=IPs=] [[SharedUniverse existing in the same universe]]: in the first ''VideoGame/DinoCrisis'', certain crates can been seen sporting the [[Franchise/ResidentEvil Umbrella Corporation]] logo. The game's setting (the Borginian Republic) in reused in the ''Franchise/AceAttorney'' series (as the Republic of Borginia). The fifth stage of ''[[GaidenGame Dino Stalker]]'' also shows an abandoned Umbrella building and the "Woman Drawing Water" statue from the [[VideoGame/ResidentEvil1 Spencer Mansion]] as {{Easter Egg}}s. And speaking of ''Resident Evil'', many ''[[VideoGame/ResidentEvil4 RE4]]'' players remember a dog in a bear trap encountered early in the game that, if rescued, [[AndroclesLion will come to your aid]] during the El Gigante boss fight. That dog is Hewie of fellow Capcom horror title ''VideoGame/HauntingGround''. Additionally, [[VideoGame/ResidentEvil5 Tricell's]] emblem can be seen on billboards in Ascension City from the 2009 ''VideoGame/BionicCommando'' sequel. Throw in the explicit fact that ''Street Fighter'', ''VideoGame/FinalFight'', ''VideoGame/SaturdayNightSlamMasters'', ''VideoGame/CaptainCommando'', and ''VideoGame/RivalSchools'' are part of a singular timeline (with ''VideoGame/StreetFighterV'' further implying Guy's master Zeku goes on to found [[VideoGame/{{Strider}} the Strider organization]]), some possible inter-series cameos in Ken's ''VideoGame/StreetFighterAlpha 2'' stage (such as [[VideoGame/AlienVsPredatorCapcom Linn Kurosawa]], who later showed up in Ryu's ''VideoGame/StreetFighterIII'' stage as well), and the suggestion from ''VideoGame/NamcoXCapcom'', ''VideoGame/ProjectXZone'', and ''Project X Zone 2'' that the various series are part of one greater world merely separated by time and space, and the implication is that these series all share some degree of cohesive continuity but Capcom doesn't really bother to go further in-depth outside of the ''[[VideoGame/CapcomVs Vs.]]'' series (and sometimes not even then).

* ''TabletopGame/MagicTheGathering'' released ''Secret Lair Drop Series: [[Series/TheWalkingDead The Walking Dead'' in 2020. This was later expanded into a full crossover line with unique card frames called "Universes Beyond." It has since gone on to include card from ''TabletopGame/Warhammer40000,'' ''Series/StrangerThings'', ''Literature/TheLordOfTheRings,'' and many more. Wizards of the Coast has also released two expansions set in the Forgotten Realms campaign setting that they own for ''TabletopGame/DungeonsAndDragons,'' though these don't use the Universes Beyond frame.

** [[DownloadableContent DLC]] for ''VideoGame/MortalKombat9'' pits the ''MK'' cast against [[Franchise/ANightmareOnElmStreet Freddy Krueger]]. The UsefulNotes/{{P|layStation3}}S3 version also had Kratos from ''VideoGame/GodOfWar'' as a GuestFighter.

** Interesting crossover here, in [[VideoGame/DevilMayCry1 the first game]]. Dante receives the sword named Alastor, imbued with an electrical motif. Later on in ''VideoGame/ViewtifulJoe'', a character named Alastor appears, complete with the electrical motif and use of the exact same sword. ([[SummonMagic Multiple copies of it]], in fact.) The connection is later made in the [[UsefulNotes/PlayStation2 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 ''VideoGame/DevilMayCry2'').

* The sequel to ''VideoGame/TransformersFallOfCybertron'', ''Rise of the Dark Spark'', crosses over the ''War for Cybertron'' universe with Michael Bay's [[Film/{{Transformers}} live-action universe]], during the events of ''Film/TransformersAgeOfExtinction''.

* The ''Franchise/PowerRangers'' have been involved in a few crossovers, including one between ''Series/PowerRangersTurbo'' and ''Series/BigBadBeetleBorgs'' in TheNineties, another between ''[[ComicBook/MightyMorphinPowerRangersBoomStudios Mighty Morphin' Power Rangers]]'' and ''ComicBook/{{Justice League|Of America}}'' in 2017, and one between ''Mighty Morphin' Power Rangers'' and ''ComicBook/TeenageMutantNinjaTurtlesIDW'' in 2019. A crossover between ''Series/PowerRangersZeo'' and ''ComicBook/{{Youngblood}}'' was announced in 1996, but went unpublished due to the [[UsefulNotes/TheGreatComicsCrashOf1996 implosion of the comic book industry that occurred that same year]].

* There have been multiple crossovers with the properties of Image, including ''ComicBook/{{Spawn}}[=/=]ComicBook/{{Batman}}'', ''ComicBook/{{Youngblood}}[=/=]ComicBook/XForce'', and even ComicBook/{{Invincible}} meeting [[Characters/MarvelComicsPeterParker Spider-Man]] in an issue of ''ComicBook/MarvelTeamUp''. There was also a two-part Gen-Actives/Mutants story that began with ''ComicBook/Team7'' and ''Team X'' (Wolverine, Sabretooth, Maverick and Wraith) and ended with ''ComicBook/Gen13'' and ''ComicBook/GenerationX''.

* ''Series/{{Angel}}'': Illyria appeared in ''ComicBook/FallenAngel: Reborn''.

* Despite their rivalry, Creator/DCComics and Creator/MarvelComics have had numerous crossovers between their two companies, leading to meetings between [[ComicBook/SupermanVsTheAmazingSpiderMan Superman and Spider-Man]] and in particular Characters/{{Batman|TheCharacter}} and Characters/{{Captain America|TitleCharacter}}, the two companies' main BadassNormal heroes, and also confrontations between heroes and villains from each, such as [[Characters/SpiderManPeterParker Spider-Man]] taking on [[Characters/BatmanTheJoker The Joker]]. The whole thing even has a standing HandWave established in the late 1990s, that the Marvel and DC universes will occasionally start to merge on their own, leaving teams from the two inhabiting the same continuity all of a sudden and remembering each other as if it's always been that way. For instance, in the ''ComicBook/XMen''[=/=]''ComicBook/TeenTitans'' crossover, at one point they even discuss bringing in the Justice League ''and'' Avengers to help.

** An unfortunate side-effect of this is that the closest [[Characters/XMen90sMembers Jubilee]] has ever come to a serious relationship is with [[Characters/RobinTimDrake a guy who lives in another universe]].

** Punisher was featured in one of the single most bizarre intercontinuity crossovers, ever: ''ComicBook/ArchieMeetsThePunisher''. The story ends with a joking tease for a future crossover between Jughead and Characters/{{Wolverine|JamesLoganHowlett}}. The Archie EIC at the time admitted the comic came about from him randomly meeting some Marvel guys at a cafe and talking.

* There have been multiple crossovers with the properties of Image, including ''ComicBook/{{Spawn}}[=/=]Franchise/{{Batman}}'', ''ComicBook/{{Youngblood}}[=/=]ComicBook/XForce'', and even ComicBook/{{Invincible}} meeting [[Characters/SpiderManPeterParker Spider-Man]] in an issue of ''Marvel Team-Up''. There was also a two-part Gen-Actives/Mutants story that began with ''ComicBook/Team7'' and ''Team X'' (Wolverine, Sabretooth, Maverick and Wraith) and ended with ''ComicBook/Gen13'' and ''ComicBook/GenerationX''.
* Top Cow published an extended crossover with Marvel called ''Devil's Reign'', which depicted characters from both universes coming together to stop Mephisto. Conversely, there have been quite a few other Top Cow crossovers that simply acted as though the various characters were part of the same universe, such as Sara Pezzini from ''ComicBook/{{Witchblade}}'' having met Characters/{{Wolverine|JamesLoganHowlett}} and [[Franchise/TombRaider Lara Croft]], the cast of ''ComicBook/{{Cyberforce}}'' having teamed up with the ComicBook/XMen, and Jackie Estacado from ''ComicBook/TheDarkness'' having fought Characters/{{Superman|TheCharacter}}, ComicBook/PainkillerJane and Characters/{{Incredible Hulk|BruceBanner}}. A particular odd duck was the ''The Darkness[=/=]Franchise/{{Batman}}'' crossover, which featured an important in-continuity event that affected the mainline ''The Darkness'' series, even though Jackie will probably never be able to mention the time he met the Dark Knight.

* ''Series/BuffyTheVampireSlayer'' seems to be a bit of a crossover whore in fanfics. Crossovers include ''VideoGame/{{Halo}}, Series/{{CSI}}'', every ''Franchise/{{Batman}}'' continuity, ''Franchise/StargateVerse'', and plenty of others. A lot of the ''Halo'' crossovers are [=YAHFs=] ("Yet Another Halloween Fic", referencing the Season 2 Halloween episode in which everyone got turned into their costumes) where Xander becomes John-117; these have an odd tendency to become ''Series/StargateSG1'' crossovers at the same time. There are even a couple ''{{Literature/Animorphs}}'' crossovers, despite Buffy being referenced as fictional in the Animorphs books. ''{{Series/Merlin|2008}}'' naturally has some, due to Anthony Head playing main roles in both series.

* The ''ComicBook/SinCity'' and ''Franchise/{{Batman}}'' fanfic called ''Fanfic/ADarkKnightOverSinCity''.

* Several arcs of ''Fanfic/YouGotHaruhiRolled'' feature characters from other series interacting with the ''Literature/HaruhiSuzumiya'' characters. The pirate arc has, as its villains, the main characters of ''Manga/LuckyStar''. Chapter 86 has a story in which [[Franchise/{{Batman}} Batman and the Joker]] fight it out at a baseball game Haruhi attends. But it is the court case arc which goes to the next level, operating with the conceit that all characters from every work of fiction ever live together in a single city, thus allowing for a MassiveMultiplayerCrossover where characters from countless fandoms take part in Haruhi's trial in one way or another.

** [[ComicBook/TeenageMutantNinjaTurtlesIDW The IDW Turtles]] cross over with the ComicBook/{{Ghostbusters}} and later Batman, in ''ComicBook/BatmanTeenageMutantNinjaTurtles'', as well as ''Franchise/StreetFighter'' in ''Teenage Mutant Ninja Turtles vs. Street Fighter''.

** Made even worse when you realize that Lilo and Stitch were originally from the Franchise/DisneyAnimatedCanon, which means that all of the Disney Channel cartoons take place in the same universe as all of the Disney animated features... [[OhCrap EEK]]!
*** Then again, the animated features are not always canon with each other.

* ''Marvel Team-Up'' #74 (October 1978) teams Spider-Man with [[Series/SaturdayNightLive The Not Ready For Prime-Time Players]] to fight Silver Samurai after Creator/JohnBelushi accidentally gets Silver Samurai's ring. In a similar vein, ComicBook/TheAvengers once appeared on ''[[Creator/DavidLetterman Late Night With David Letterman]]'', whereas ''ComicBook/FantasticFour'' let the Thing fight an out-of-control robot on the set of ''Series/TheGongShow'' (AllPartOfTheShow ensued).

* A 2015 Dutch ''ComicBook/DisneyDucksComicUniverse'' book, ''[[http://www.marvunapp.com/Appendix8/donaldduckspidey.htm Donald Duck: Superhelden Special]]'' had Donald auditioning for a Franchise/SpiderMan movie, only to end up teaming with the real Spider-Man (who, in the Ducks universe, is a {{Dogface}}). There was even a cameo by a Dogface Creator/StanLee!

* The original Mirage ''ComicBook/{{Teenage Mutant Ninja Turtles|Mirage}}'' have crossed over with several other indie comic book characters, most notably [[ComicBook/UsagiYojimbo Miyamoto Usagi]], ComicBook/{{Cerebus}}, the WesternAnimation/WildWestCowboysOfMooMesa, and ComicBook/SavageDragon. Plus ''WesternAnimation/TurtlesForever'', crossing over with both initial TMNT cartoons.

* For a few years, Hasbro had a ''Franchise/{{Transformers}}'' sub-line called Transformers Crossovers, including ''Franchise/StarWars'' and Creator/MarvelComics characters. They are presented as the characters driving vehicles that transform into HumongousMecha that look like they do, ranging from a [[Comicbook/TheIncredibleHulk Hulkbot]] turning into a tank to a moon-sized Darth Vader robot transforming to the Death Star. The ''Star Wars'' ones have an advantage in that they can use existing vehicles to turn into. The Marvel ones ''don't'' have existing vehicles (for the most part... but then again, try remembering the last time you saw Spider-Man's Spider-Mobile), but this is an advantage in its own way as they can be designed almost entirely around making the robot mode look right.

* ''WebVideo/ImAMarvelAndImADC'' has Marvel and DC characters (and occasionally characters from other continuities, such as ''Comicbook/{{Hellboy}}'') arguing with each other about whose comics and movies are best. Then there's the "After Hours" series which has actual storylines involving characters from both continuities, in the same vein as the official Marvel/DC crossovers.