History Main / IntraFranchiseCrossover

* ''Anime/SuperDragonBallHeroes'' is this for ''Franchise/DragonBall'' to an extent. Specifically, the Prison Planet saga see Son Goku from ''Anime/DragonBallSuper'' meets Son Goku from ''Anime/DragonBallGT''. Also, some characters from other media like [[VideoGame/DragonBallZArcade Ozotto]] and [[Anime/DragonBallZLordSlug Slug]] appear as enemies in the series.

** ''VideoGame/Persona4Arena'' is a FightingGame sequel to the events of ''VideoGame/Persona4'' wherein the Investigation Team crosses paths with a few former members of [[VideoGame/Persona3 S.E.E.S.]] (Mitsuru, Akihiko, and Aigis), now calling themselves the Shadow Operatives, as well as Elizabeth, the third game's Velvet Room attendant. Where this trope really kicks in is the sequel, ''VideoGame/Persona4ArenaUltimax'', which sees not only the majority of the other ''Persona 3'' party members return to action (though Fuuka remains on the sidelines, unlike fellow SupportPartyMember Rise), but several [[NonPlayerCharacter NPCs]] from ''Persona 4'' (''[[UpdatedRerelease Golden]]'') get PromotedToPlayable, accounting for most of the [[spoiler:still living]] major players in ''P3'' and ''P4''. [[spoiler:And even then, it turns out that MoleInCharge Ikutsuki [[VillainousLegacy is responsible for one of the main antagonists]] and gets several fakes in his likeness to cameo throughout ''Ultimax'' despite being confirmed dead.]] Unlike the ''Persona Q'' titles below, this duology is canon.

** ''VideoGame/PokemonRedAndBlue'': Despite being a canon game, the third of the trio, ''Special Yellow Pikachu Edition'', uses the anime designs instead of the ones from ''Red'' and ''Blue''/''Green''. This includes replacing the generic Team Rocket grunts with Jessie and James (and Meowth). The main character is locked into a Pikachu as a starter instead of being able to choose from Bulbasaur/Charmander/Squirtle, like Ash did in the anime, and starting off the rival with Eevee, just like Gary did.
** ''VideoGame/PokemonSunAndMoon'': Special "Ash's Cap" Pikachus were given out for the 20th anniversary of the franchise, as well as for a tie-in with the ''I Choose You'' movie. Meanwhile, a Greninja with the Ash-Greninja ability from the anime was given out as a thank-you for playing the game's demo. These Pokémon also showed up in ''Pokémon Shuffle'' and ''Tretta''.
** ''VideoGame/DetectivePikachu'': Tim and Detective Pikachu briefly run into another Pikachu early on in the game. A line of dialogue implies it's [[Anime/{{Pokemon}} Ash's Pikachu]], specifically:

** Just like in ''VideoGame/HyruleWarriors'', the ''Franchise/TheLegendOfZelda'' franchise has multiple characters from different eras. In ''[[VideoGame/SuperSmashBros64 Smash 64]]'' and ''[[VideoGame/SuperSmashBrosMelee Melee]]'', Link, Zelda, Sheik, Young Link and Ganondorf are based on their ''[[VideoGame/TheLegendOfZeldaOcarinaOfTime Ocarina of Time]]'' designs. ''[[VideoGame/SuperSmashBrosBrawl Brawl]]'' and ''[[VideoGame/SuperSmashBrosForNintendo3DSAndWiiU 3DS/Wii U]]'' change them to their ''[[VideoGame/TheLegendOfZeldaTwilightPrincess Twilight Princess]]'' designs, but Young Link is replaced with Toon Link from ''[[VideoGame/TheLegendOfZeldaTheWindWaker The Wind Waker]]''. ''[[VideoGame/SuperSmashBrosUltimate Ultimate]]'' embraced the multiple eras, as Link has his ''[[VideoGame/TheLegendOfZeldaBreathOfTheWild Breath of the Wild]]'' design (with Sheik having a ''Breath of the Wild''-based design, despite not being in that game), Ganondorf and Young Link use their N64 designs, Zelda has a design based on ''[[VideoGame/TheLegendOfZeldaALinkToThePast A Link to the Past]]'' and ''[[VideoGame/TheLegendOfZeldaALinkBetweenWorlds A Link Between Worlds]]'', while Toon Link of course represents ''The Wind Waker'' again. The series also has many Assist Trophies, stages and music from different Zelda games that don't have a playable fighter.
** ''Franchise/FireEmblem'' has multiple playable protagonists from across the series in the roster; for its debut in ''Melee'', Marth from ''[[VideoGame/FireEmblemShadowDragonAndTheBladeOfLight Shadow Dragon]]'' and Roy from ''[[VideoGame/FireEmblemTheBindingBlade The Binding Blade]]'' were implemented as newcomers. ''Brawl'' would drop Roy, but return Marth and bring Ike from ''[[VideoGame/FireEmblemPathOfRadiance Path of Radiance]]'' and ''[[VideoGame/FireEmblemRadiantDawn Radiant Dawn]]''. The next instalment, ''for 3DS/Wii U'', would return Marth and Ike while adding Robin and Lucina from ''[[VideoGame/FireEmblemAwakening Awakening]]'', return Roy as DLC and also bring in Corrin from ''[[VideoGame/FireEmblemFates Fates]]'' as one of the last doanloadable fighters. ''Ultimate'' would bring all of them back, while also introducing Chrom from ''Awakening'' in the base game and Byleth from ''[[VideoGame/FireEmblemThreeHouses Three Houses]]'' as DLC. Like ''Zelda'' above, it also has secondary content from other games without a fighter.
** The only playable character from the ''Franchise/MegaMan'' franchise is VideoGame/{{Mega Man|Classic}} from the Classic series, but in his Final Smash, he brings X from ''VideoGame/MegaManX'', [=MegaMan.EXE=] from ''VideoGame/MegaManBattleNetwork'', [=MegaMan Volnutt=] from ''VideoGame/MegaManLegends'' and Star Force Mega Man from ''VideoGame/MegaManStarForce''. ''[[VideoGame/SuperSmashBrosUltimate Ultimate]]'' added Proto Man and Bass, and the game also has Zero from ''Mega Man X'' as an Assist Trophy.

** A case is seen in the events surrounding ''ComicBook/TheFinalDaysOfSuperman''; the [[ComicBook/New52 pre-New 52]] Superman and Lois Lane have ended up in the New 52 timeline, staying off the radar as they raise their son Jonathan. After the N52 Superman falls in battle against a powerful enemy, the pre-N52 Superman decides to take over for him. At least until much later in ''ComicBook/SupermanReborn'', when [[spoiler:the two Supermen and Loises merge with each other]].

* In one strip of the ''Animation/PleasantGoatAndBigBigWolf'' manhua, Wolffy in his ''Mr.Wolffy, Mr.Right!'' design meets Sparky and Weslie in their designs from the normal show. Wolffy doesn't stick around for very long.

*** The FinalBoss is [[spoiler:both Classic and Modern Sonic uniting themselves and using the Chaos Emeralds to fight the Time Eater, controlled by Modern Dr. Eggman and Classic Dr. Eggman, the latter of which is called Dr. Robotnik by Classic Tails, [[LampshadeHanging prompting him to point out no one calls him that anymore]]]].
** Classic Sonic and Modern Sonic once again team up in the sequel game ''VideoGame/SonicForces'', the [[VideoGame/SonicMania other part]] of the [[MilestoneCelebration 25th anniversary celebration]] of the franchise, in which the player can choose between three different styles, Classic Sonic style, Modern Sonic style and an [[PlayerCharacter Avatar]] style, a mode in which the player can create their own character. However, ''Forces'' retcons ''Generations'' by stating that Classic Sonic is not Sonic from the past, and is instead another Sonic from [[AlternateUniverse another dimension]] (presumably because the events of ''Generations'' created an AlternateTimeline that branched off from ''VideoGame/Sonic3AndKnuckles'', leading to ''Mania'' for Classic Sonic), [[FanDislikedExplanation something fans were not pleased to learn]].

* An InUniverse example happens in ''WesternAnimation/TheFairlyOddParents''. In the episode "The Crimson Chin meets Mighty Mom and Dyno Dad", the Crimson Chin meets several wildly different versions of his EraSpecificPersonality, from the 30s pulp-fiction Chin, to the "super-edgy" 1985 Chin, who got cancelled for swearing.

** In a later ''Treehouse of Horror'' segment ([[Recap/TheSimpsonsS26E4TreehouseOfHorrorXXV XXV]]'s "The Others"), the Simpsons are haunted by the ghosts of the ''Tracey Ullman''-era Simpsons. The ending of that segment featured various derivatives of the family wanting to move into the Modern Simpsons' house after they were killed. Most of the alternate Simpsons were created specifically for this scene, but three previous versions do make an appearance here -- the "Island of Dr. Hibbert" ("[[Recap/TheSimpsonsS14E1TreehouseOfHorrorXIII Treehouse of Horror XIII]]") Simpsons in their animal forms (Panther Marge, Spider Bart, Aardvark Maggie, Owl Lisa, and Walrus Homer), the [[BuiltWithLEGO LEGO Simpsons]] from "[[Recap/TheSimpsonsS25E20BrickLikeMe Brick Like Me]]", and Creator/SylvainChomet's version of the Simpsons from "[[Recap/TheSimpsonsS25E12Diggs Diggs]]"'s CouchGag.

* While many ''Franchise/{{Gundam}}'' games are adaptations of a single work or serve as WhatIf[=/=]ExpandedUniverse material, several others are more traditional {{Crisis Crossover}}s between the various timelines. Examples include the ''VideoGame/GundamVsSeries'' starting from ''Gundam vs Gundam'' and ''VideoGame/DynastyWarriors: Gundam''.

** For ''VideoGame/{{Castlevania}}'', ''Ultimate'' introduced both Simon Belmont, [[VideoGame/CastlevaniaI from the original game in the series]], and Richter Belmont, from ''[[VideoGame/CastlevaniaRondoOfBlood Rondo of Blood]]'', as playable fighters, with Alucard also appearing as an Assist Trophy deliberately designed after his ''[[VideoGame/CastlevaniaSymphonyOfTheNight Symphony of the Night]]'' incarnation. Likewise, there's various music tracks and spirits of characters from multiple games in the series.

* The ''WesternAnimation/JusticeLeague'' episode "Legends" was [[WhatCouldHaveBeen initially intended]] to feature the Comicbook/JusticeSocietyOfAmerica. [[ExecutiveMeddling The rights weren't cleared]] (possibly because the superheroes involved were portrayed as [[InnocentBigot somewhat bigoted]]), so the writers instead used a CaptainErsatz version called "The Justice Guild".

MeetYourEarlyInstallmentWeirdness is common when the two iterations have major differences between each other. See also CrisisCrossover, BatFamilyCrossover, TheVerse and TheMultiverse. Compare SpinoffSendoff, where a new iteration of a franchise is launched with a supporting appearance by someone from the immediately previous version. SisterTrope of AllianceOfAlternates, where the crossover happens in the same iteration of the franchise (but overlap between the two tropes is not unheard of). Should not be confused with IntercontinuityCrossover, in which two ''different'' franchises clash together.

* While many ''Franchise/{{Gundam}}'' games are adaptations of a single work or serve as WhatIf[=/=]ExpandedUniverse material, several others are more traditional {{Crisis Crossover}}s between the various timelines. Examples include the ''VideoGame/GundamVsSeries'' starting from ''Gundam vs Gundam'' and ''VideoGame/DynastyWarriors: Gundam''.

** ''Rockman.EXE Operate Shooting Star'' is a Japan-only UsefulNotes/NintendoDS remake of the first ''VideoGame/MegaManBattleNetwork'' with an added chapter in which Geo Stelar of ''VideoGame/MegaManStarForce'' travels back in time and teams up with his predecessors.
* Commonly seen in ''VideoGame/{{MUGEN}}'', in which you can make the roster as you like, so you can put the same character from different games in the same created fighting game you like. As example, you can put [[Franchise/StreetFighter Ryu]] from ''VideoGame/StreetFighterII'', ''VideoGame/StreetFighterAlpha'', ''VideoGame/MarvelVsCapcom'' series, ''VideoGame/SNKVsCapcomSVCChaos'', ''[[VideoGame/SNKVsCapcom Capcom vs. SNK]]'' series and even the original ''VideoGame/StreetFighterI'' in the same roster and make them fight against each other.

** Classic Sonic and Modern Sonic once again team up in the sequel game ''VideoGame/SonicForces'', the [[VideoGame/SonicMania other part]] of the [[MilestoneCelebration 25th anniversary celebration]] of the franchise, in which the player can choose between three different styles, Classic Sonic style, Modern Sonic style and an [[PlayerCharacter Avatar]] style, a mode in which the player can create their own character.
*** However, ''Sonic Forces'' retcons ''Sonic Generations'' by stating that Classic Sonic is not Sonic from the past, and is instead another Sonic from [[AlternateUniverse another dimension]] (presumably because the events of ''Generations'' created an AlternateTimeline that branched off from ''VideoGame/Sonic3AndKnuckles'', leading to ''Mania'' for Classic Sonic), [[FanDislikedExplanation something fans were not pleased to learn]].

* ''VideoGame/MarioAndLuigiPaperJam'' is an installment from the ''VideoGame/MarioAndLuigi'' series where characters from the ''Franchise/SuperMarioBros'' games meet [[VideoGame/PaperMario their paper counterparts]].

** Three of ''Manga/DigimonVTamer01'''s bonus chapters involve Taichi and Zero encountering characters from later Digimon works. Namely, Daisuke and V-mon from ''Anime/DigimonAdventure02'', Ryo Akiyama and Monodramon from [[Videogame/DigimonWonderswanSeries The Wonderswan Series]] and Takuya from ''Anime/DigimonFrontier''.
** In the last two episodes of the ''Digimon Xros Wars'' (''Anime/DigimonFusion'' [[MarketBasedTitle outside of Japan]]): Young Hunters Through Time, the protagonists of the prior seasons of Digimon shows (Tai and Agumon from ''Anime/DigimonAdventure'', Davis and Veemon from ''Anime/DigimonAdventure02'', Takato and Guilmon from ''Anime/DigimonTamers'', Takuya from ''Anime/DigimonFrontier'', and Marcus and Agumon from ''Anime/DigimonDataSquad'' /Savers) arrived to help the heroes against Quartzmon. In addition, Mimi, Palmon, Joe, Gomamon (all from ''Adventure''), and Rika and Renamon (''Tamers'') also appear in that set of episodes.

* The seven seasons of ''Toys/{{Jewelpet}}'' take place in {{alternate continuit|y}}ies, with the main settings and human characters changing each season along with the Jewelpets' personalities. In episode 21b of ''Anime/JewelpetMagicalChange'', Ruby gets a call from her ''Anime/Jewelpet2009'' self and learns about her human partner Rinko and her search for the Jewelsticks, followed by the Rubys from the remaining five seasons giving the ''Magical Change'' Ruby a call as well. This culminates in ''the Magical Change Ruby somehow calling herself on her Jewel Pod'', which the Ruby receiving the call doesn't seem to be confused by.

** A literal example is seen in ''VideoGame/SuperSmashBrosForNintendo3DSAndWiiU'', in which Mega Man is a GuestFighter, and his [[MeteorMove Final Smash]] is a powered Mega Buster in which all versions of him (X, Rock Volnutt, [[VideoGame/MegaManBattleNetwork MegaMan.EXE]] and [[VideoGame/MegaManStarForce Mega Man/Omega-Xis]]) appear to make a [[AllYourPowersCombined Multiple Mega Buster together]]. This was retained for the next game in the series, ''VideoGame/SuperSmashBrosUltimate'', only with the addition of [[AloofOlderBrother Proto Man]] and [[TheRival Bass]] from the Classic series.

The explanation for how such crossovers can happen may vary: the most common is that all the different versions of the same characters exist as part of a {{Multiverse}}, and once the characters can jump from one universe to another with the [[AppliedPhlebotinum required Phlebotinum]], they can meet themselves. Another (similar but more rare) explanation is that all these versions exist in the same universe, but are separated by a time period and so once they have TimeTravel, the SuperTeam from the recent cartoon can meet themselves from the original 1960 cartoon. This can get weird when the old characters aren't meeting their descendants or substitutes, the characters are the same -- but thanks to a redesign or a ToneShift, they will look similar but still different enough to stand apart, and you're expected to believe that the character changed his looks and his personality over time, so, usually, the "new one" doesn't remember being the "old one".

MeetYourEarlyInstallmentWeirdness is common when the two iterations have major differences between each other. See also CrisisCrossover, BatFamilyCrossover, TheVerse and TheMultiverse. Compare SpinoffSendoff, where a new iteration of a franchise is launched with a supporting appearance by someone from the immediately previous version. SisterTrope of AllianceOfAlternates, where the crossover happens in the same iteration of the franchise (but overlap between the two tropes is not unheard of). Should not be confused with IntercontinuityCrossover, in which 2 ''different'' franchises clash together.

** A Drama CD for the game has it crossover with the second movie. Note that the movies are [[RecursiveCanon propaganda produced by the TSAB]] and shouldn't even exist as a separate continuity.

* ''Anime/SuperDragonBallHeroes'': In the Prison Planet saga, Son Goku from ''Anime/DragonBallSuper'' meets Son Goku from ''Anime/DragonBallGT''. Also, some characters from other media like [[VideoGame/DragonBallZArcade Ozotto]] and [[Anime/DragonBallZLordSlug Slug]] appear as enemies in the series.
* The seven seasons of ''Toys/{{Jewelpet}}'' take place in {{alternate continuit|y}}ies, with the main settings and human characters changing each season along with the Jewelpets' personalities. In episode 21b of ''Anime/JewelpetMagicalChange'', Ruby gets a call from her ''Anime/Jewelpet2009'' self and learns about her human partner Rinko and her search for the Jewelsticks, followed by the Rubys from the remaining five seasons giving the ''Magical Change'' Ruby a call as well. This culminates in ''the Magical Change Ruby somehow calling herself on her Jewel Pod'', which the Ruby receiving the call doesn't seem to be confused by.

* ''Franchise/SpiderMan'':
** ''ComicBook/SpiderVerse'' is a major example based on the Spider-Man character; promising "Every Spider-Man Ever", it's a comic-book arc focused around the many different versions of the hero, joining forces in a quest to fight a villain who wants to wipe out all of them. Along with the multiple Spider-Men from comics, ranging from alternate universes, alternate timelines, alternate identities and other superheroes that also have a spider theme, they also mixed in other Spider-Men from animated and live-action series, manga and video games.
** Among the weirder versions of the character featured in that arc, we find Spider-Man from [[WesternAnimation/SpiderMan1967 the corny 60s cartoon]], Six-Armed Spider-Man, ComicBook/SpiderHam, the pig from an alternate universe populated by {{funny animal}}s, and Takuya Yamashiro AKA [[Series/SpiderManJapan Japanese Spider-Man]], from the 70s live-action series where he has a giant robot (which he brought to the crossover) as well as [[Manga/SpiderManManga both Japanese versions from the manga]].
** However, thanks to copyright issues, they couldn't include every version of Spider-Man as promised. In particular, the famous versions from live-action movies couldn't be shown on panel, but one Spider-Man mentions that he saw another one that looks like the guy from ''Film/{{Seabiscuit}}'', another movie by Creator/TobeyMaguire, and another one mentions one that looks the guy from ''Film/TheSocialNetwork'', another movie by Creator/AndrewGarfield.
** Also, there's the ''ComicBook/SpiderMen'' series (2012 and 2017), in which Miles Morales meets Peter Parker from Earth-616 (before the ''ComicBook/{{Secret Wars|2015}}'' CrisisCrossover) and learns some classes about how to be Spider-Man. This plot and ''Spider-Verse'' were combined to make the 2018 CGI movie ''WesternAnimation/SpiderManIntoTheSpiderVerse''.

** Issue 13 of the ''WebAnimation/DCSuperHeroGirls: Spaced Out'' digital series features Zatanna showing the Super Hero High students [[SpinoffSendoff a peek]] into the universe of the [[WesternAnimation/DCSuperHeroGirls television series]] that premiered in 2019.
** A case is seen in the events surrounding ''ComicBook/TheFinalDaysOfSuperman''; the [[ComicBook/New52 pre-New 52]] Superman and Lois Lane have ended up in the New 52 timeline, staying off the radar as they raise their son Jonathan. After the N52 Superman falls in battle against a powerful enemy, the pre-N52 Superman decides to take over for him. At least until much later in ''ComicBook/SupermanReborn'', when [[spoiler: the two Supermen and Loises merge with each other.]]

* ''ComicBook/GhostbustersIDWComics'': after a crossover with the ''Franchise/TeenageMutantNinjaTurtles'' taught them how to travel the multiverse, the original Film/{{Ghostbusters|1984}} from the 1984 movie encountered those from ''WesternAnimation/TheRealGhostbusters'' cartoon. In a sequel, the crossovers expanded to include the [[Film/Ghostbusters2016 remake]], ''WesternAnimation/ExtremeGhostbusters'', and several video game versions.
* ''Franchise/{{Transformers}}'': The ''Transformers Universe'' comic book was about Unicron abducting Autobots, Maximals, Decepticons and Predacons throughout the multiverse. The later collectors' club comics take an approach more akin to a CrossThrough, with fixed protagonists traveling through the many Transformers universes.
* The comic book ''Battlestar Galactica vs. Battlestar Galactica'' is a crossover between the [[Series/BattlestarGalactica1978 two]] [[Series/BattlestarGalactica2003 versions]] of the show.

* ''WesternAnimation/TurtlesForever'' is a textbook example, with the Franchise/TeenageMutantNinjaTurtles from [[WesternAnimation/TeenageMutantNinjaTurtles2003 the 2003 animated series]] meeting up with the Turtles from [[WesternAnimation/TeenageMutantNinjaTurtles1987 the 1987 animated series]]. The two versions of the Turtles exist in alternate dimensions and meet each other when messing with interdimensional travel. In the end, both versions meet the original Turtles from [[ComicBook/TeenageMutantNinjaTurtlesMirage the 1984 comic books]], who are presented as the prime Turtles. Erasing the existence of the 1984 Turtles would do the same to all the other versions. Also, a computer screen shows the Multiverse, which features the many dimensions populated by other versions of the Turtles like [[WesternAnimation/{{TMNT}} the 2007 CGI movie]], [[Film/TeenageMutantNinjaTurtles the live-action]] [[Film/TeenageMutantNinjaTurtlesIITheSecretOfTheOoze movies from]] [[Film/TeenageMutantNinjaTurtlesIII the '90s]], and even [[Anime/TeenageMutantNinjaTurtlesLegendOfTheSupermutants the bizarre two-episode anime]]. However, missing from the screen are some {{Old Shame}}s like [[Series/NinjaTurtlesTheNextMutation the live-action TV series]] and the rock musical.

* ''WesternAnimation/TeenTitansGoVsTeenTitans'' is also this due to being a crossover between ''WesternAnimation/TeenTitans'' and ''WesternAnimation/TeenTitansGo'' . [[spoiler:It also has Titans from various dimensions helping both teams in the climax with the most notable versions being from the ''WesternAnimation/DCAnimatedMovieUniverse'', the ''ComicBook/TinyTitans'' comics and even ''[[ComicBook/TeenTitans The New Teen Titans]]'' comics which the 2003 show was based on.]]

* The 2019 ''Series/{{Arrowverse}}'' CrisisCrossover features cameos from many different versions of characters from throughout DC media, with some of them being [[AlternateSelf alternate versions]] of each other. These include the ''Series/{{Supergirl|2015}}'' Clark Kent meeting the ''Series/{{Smallville}}'' Clark Kent and later the Clark Kent from ''Film/SupermanReturns''. Meanwhile Barry Allen from Earth-1 (''Series/TheFlash2014'') meets his Earth-90 counterpart (''Series/TheFlash1990'') along with the version from the ''Franchise/DCExtendedUniverse''.
* David Brent, the [[PointyHairedBoss hopeless boss]] from the British version of ''[[Series/TheOfficeUK The Office]]'', has made a couple of guest appearances on [[Series/TheOfficeUS the American version]].
* ''Franchise/SuperSentai'':
** The series traditionally had a team up with their previous counterparts from the previous seasons. The former does this as a late season team up movie, while the later does this as an episode that adapts footage from the movie. The Super Sentai movies also feature a quick sequence that marks the first debut of the upcoming season.
** Special mention goes to ''Series/KaizokuSentaiGokaiger'', which features an appearance by one member of every team from all previous 34 incarnations.
** Recently, the series has begun featuring team ups of teams from various teams with similar themes. ''Film/ZyudenSentaiKyoryugerVsGobusters'' featured team ups with the previous two dinosaur teams (''Series/KyoryuSentaiZyuranger'' and ''Series/BakuryuuSentaiAbaranger'' plus the Cameo from ''Series/ResshaSentaiToqger''). ''Series/ShurikenSentaiNinninger'' featured the return of the respected red rangers from ''Series/NinjaSentaiKakuranger'' and ''Series/NinpuuSentaiHurricaneger'' and a cameo from the red ranger of ''Series/HimitsuSentaiGoranger'' to commemorate the 40 year to the day aniversery of the first episode of Super Sentai.

** Following the example of ''Franchise/SuperSentai'', the series has various episodes when Rangers from previous seasons (usually called as "Retro Rangers" and "Legendary Rangers"), made mostly for [[MilestoneCelebration Anniversary Specials]] of the series.
** The yearly tradition similar to sentai's sadly came to an end during the Disney era, as such episodes were deemed too expensive, especially without toys to promote (the returning team being off the toy shelves by this point.)
** The 10th Anniversary Special has the ''[[Recap/PowerRangersWildForceForeverRed Forever Red]]'' episode in ''Series/PowerRangersWildForce'', in which Red Lion Ranger teams up with all the previous Red Rangers from past 9 seasons, including Creator/JasonDavidFrank as [[Series/PowerRangersZeo Zeo Ranger V Red]].
** The 15th Anniversary Special has the ''[[Recap/PowerRangersOperationOverdriveS1E20OnceARangerPart1 Once a]] [[Recap/PowerRangersOperationOverdriveS1E21OnceARangerPart2 Ranger]]'' double episode, in which the Rangers of ''Series/PowerRangersOperationOverdrive'' get replaced temporarily by (and teams up with) the team called as the "[[http://powerrangers.wikia.com/wiki/Retro_Rangers Retro Rangers]]", formed by [[Series/MightyMorphinPowerRangers Black Ranger]] (Adam Park, TheLeader), [[Series/PowerRangersNinjaStorm Blue Wind Ranger]], [[Series/PowerRangersDinoThunder Yellow Dino Ranger]], [[Series/PowerRangersSPD S.P.D. Red Ranger]] and [[Series/PowerRangersMysticForce Green Mystic Ranger]].
** The 20th Anniversary Special has ''[[Recap/PowerRangersSuperMegaforceS2EP20LegendaryBattle Legendary Battle]]'' as the SeasonFinale of ''Series/PowerRangersSuperMegaforce'' in which appear ''EVERY'' Ranger incarnation ever made in ''Power Rangers'' franchise. Also, there's ''[[http://powerrangers.wikia.com/wiki/The_Legendary_Battle:_Extended_Edition The Legendary Battle: Extended Edition]]'' which apart of this episode, includes the previous one that starts everything (''[[Recap/PowerRangersSuperMegaforceS2EP19TheWrath The Wrath]]'') and also 43% of [[BonusMaterial extra]] [[DeletedScene footage]], all of this packed as a [[DirectToVideo DVD movie]].
** The 25th anniversary gives us Dimensions in Danger, with a villain trying to invade TheMultiverse (since RPM takes place in an alternate BadFuture and Dino Charge alters history pretty drastically in its final arc, alternate universes are the excuse that lets them join in team-up occasions alongside teams in the normal universe.) The main returning Rangers are Tommy, Wes, Gemma, and Koda, each representing one of the four past eras of the franchise, with Katherine, TJ, Rocky, Antonio, Gia, and Trent joining in the final battle.
* ''Series/DoctorWho'' has Multi-Doctor specials, where different versions of the Doctor will team up to face a common threat. More applies to specials where the Doctor from the New Series teams up with one from the Classic Series (starting with the special "[[Recap/DoctorWho2007CiNSTimeCrash Time Crash]]"), such as "[[Recap/DoctorWho50thASTheDayOfTheDoctor The Day of the Doctor]]" and "[[Recap/DoctorWho2017CSTwiceUponATime Twice Upon A Time]]".
** There was also the big Torchwood/Sarah Jane crossover for The Stolen Earth/Journey's End two parter on the parent show.

*** The Final Boss is [[spoiler:both Classic and Modern Sonic uniting themselves and using the Chaos Emeralds to fight the Time Eater, alongside Modern Dr. Eggman and Classic Dr. Eggman, who is called Dr. Robotnik by Classic Tails, [[LampshadeHanging until he points no one calls him that anymore]]]].
** Classic Sonic and Modern Sonic once again team up in the sequel game ''VideoGame/SonicForces'', the [[VideoGame/SonicMania other part]] of the [[MilestoneCelebration 25th anniversary celebration]] of the franchise, in which the player can choose between 3 different styles, Classic Sonic style, Modern Sonic style and an [[PlayerCharacter Avatar]] style, a mode in which the player can create their own character.

* ''VideoGame/CastlevaniaJudgment'': The character [[VideoGame/KidDracula Galamoth]] plots to send the [[TheDragon Time Reaper]] from 10,000 years in the future into the past to destroy his rival {{Dracula}} and change history. A man named Aeon discovers this and pulls together champions from [[Franchise/{{Castlevania}} different eras of history]] into a time rift, in order to find a chosen one capable of destroying Galamoth's servant, the Time Reaper.
* Commonly seen in ''VideoGame/{{MUGEN}}'', in which you can make the roster as you like, so you can put the same character from different games in the same created fighting game you like. As example, you can put [[Franchise/StreetFighter Ryu]] from ''VideoGame/StreetFighterII'', ''VideoGame/StreetFighterAlpha'', ''VideoGame/MarvelVsCapcom'' series, ''VideoGame/SNKVsCapcomSVCChaos'', ''[[VideoGame/SNKVsCapcom Capcom vs. SNK]]'' series and even the original ''VideoGame/StreetFighterI'' in the same roster and make them fight against each other.
* This is commonly seen in the ''Franchise/MegaMan'' series:
** In some other media apart of video games, this is commonly seen when VideoGame/{{Mega Man|Classic}} meets [[VideoGame/MegaManX X]], like in an episode of the [[WesternAnimation/MegaManRubySpears Ruby-Spears American cartoon]] and in one of the ''ComicBook/MegaManArchieComics'' comics.
** In ''VideoGame/MegaManII'', there's Quint, a Mega Man from the future who was brought to the present and modified by Dr. Wily to be one of "Mega Man Killers", who also returns in future games of the Classic franchise.
** Also seen in various of ''VideoGame/CapcomVs'' games in which various Mega Man versions (or characters from different game series) can be seen together, like ''VideoGame/SNKVsCapcomCardFightersClash'' series in which you can see Character Cards of all ''Mega Man'' games in the same deck. Another good example is ''VideoGame/TatsunokoVsCapcom'', in which [[VideoGame/MegaManLegends Rock Volnutt]] is present alongside [[VideoGame/MegaManClassic Roll]] (and, in ''[[UpdatedRerelease Ultimate All-Stars]]'', [[VideoGame/MegaManX Zero]]) despite the wide gaps in time between their respective series.
** A literal example is seen in ''VideoGame/SuperSmashBrosForNintendo3DSAndWiiU'', in which Mega Man is a GuestFighter, and his [[MeteorMove Final Smash]] is a powered Mega Buster in which all versions of him (X, Rock Volnutt, [[VideoGame/MegaManBattleNetwork MegaMan.EXE]] and [[VideoGame/MegaManStarForce Mega Man/Omega-Xis]]) appear to make a [[AllYourPowersCombined Multiple Mega Buster together]]. This was retained for the next game in the series, ''VideoGame/SuperSmashBrosUltimate'', only with the addition of [[AloofOlderBrother Proto Man]] and [[TheRival Bass]] from the Classic series.
** ''Rockman.EXE Operate Shooting Star'' is a Japan-only UsefulNotes/NintendoDS remake of the first ''VideoGame/MegaManBattleNetwork'' with an added chapter in which Geo Stelar of ''VideoGame/MegaManStarForce'' travels back in time and teams up with his predecessors.
* ''VideoGame/SpiderManShatteredDimensions'', a game in which you can manage Spider-Men from different alternate realities, the [[Franchise/MarvelUniverse mainstream one]] (Peter Parker), [[ComicBook/SpiderManNoir Noir one]] (also Peter Parker), [[ComicBook/SpiderMan2099 Marvel 2099 one]] (Miguel O'Hara) and [[ComicBook/UltimateSpiderMan Ultimate one]] ([[RuleOfThree Peter Parker once again]]) to find a shattered cosmic MacGuffin and stop their respective villains from using the pieces to become immensely powerful.
** There was a follow-up called ''VideoGame/SpiderManEdgeOfTime'', although this one was only about the mainstream one and the Marvel 2099 one working together to prevent the death of the former from happening, which somehow caused Alchemax from the Marvel 2099 reality to TakeOverTheWorld.
* ''VideoGame/MarioAndLuigiPaperJam'' is an installment from the ''VideoGame/MarioAndLuigi'' series where characters from the ''Franchise/SuperMarioBros'' games meet their [[VideoGame/PaperMario paper counterparts]].
* ''Franchise/FateSeries'':
** ''VideoGame/FateGrandOrder'' pulls from all over the ''Fate'' series, including its alternate universes (''[[Anime/FatePrototype Prototype]]'' and the universe Musashi comes from, for starters), offshoot timelines (''[[VisualNovel/FateHollowAtaraxia Hollow Ataraxia]]'', ''[[VideoGame/FateExtra EXTRA]]''), and even its gag series (''Koha-Ace'' and ''[[Webcomic/LearningWithMangaFGO Learning with Manga!]]''). Unfortunately, not everyone could make it to the game, as most of the cast of ''[[Literature/FateStrangeFake strange fake]]'' is on embargo until it wraps up.
** ''Grand Order'' incorporates the greater ''Franchise/{{Nasuverse}}'' even outside the ''Fate'' subseries; one of the first "collaboration" events of the game was with ''LightNovel/TheGardenOfSinners''.
* ''VideoGame/PowerRangersBattleForTheGrid'' features a host of characters from across [[Franchise/PowerRangers the franchise]] (including a villain from the [[ComicBook/MightyMorphinPowerRangersBoomStudios comic book adaptation]] that had never appeared in the series proper).
* ''Franchise/{{Persona}}'':
** ''VideoGame/PersonaQShadowOfTheLabyrinth'' is a non-canon game featuring the playable characters from ''VideoGame/Persona3'' and ''VideoGame/Persona4''. Oddly, despite the original games being only a few years apart in places so close that characters from ''4'' have visited the setting of ''3'', this game still had to resort to [[TimeyWimeyBall Timey-Wimey shenanigans]] due to [[spoiler:the protagonist's death at the end of ''Persona 3'']]. [[spoiler:Once the RealityBreakingParadox that brought both groups together is dealt with, they return home without any knowledge of what happened, hence why no one recognizes each other during the events of ''VideoGame/Persona4Arena''.]]
** Its sequel, ''VideoGame/PersonaQ2NewCinemaLabyrinth'', reunites the ''P3'' and ''P4'' casts on top of bringing in [[VideoGame/Persona5 the Phantom Thieves of Hearts]] ''and'' the female protagonist exclusive to ''Persona 3 [[UsefulNotes/PlayStationPortable Portable]]'' (who is implied to be an AlternateSelf to [[CuttingOffTheBranches her mainline counterpart]]). While the same Timey-Wimey shenanigans ensue [[spoiler:once again to get around the ''P3'' protagonist's canonical death (as well as the fact that ''P5'' is at least a few years farther along in the timeline than ''P4'' was)]], [[spoiler:Joker, the PlayerCharacter of ''5'' and ''Q2'', appears to be the ''only'' person outside of the Velvet Room attendants to exhibit RippleEffectProofMemory after returning to his time, as he recognizes [[OriginalGeneration Hikari]] while attending a high school film festival in the epilogue]].
* ''Franchise/{{Pokemon}}'': The "core" games are generally treated as one continuity, the long-running ''[[Anime/PokemonTheSeries Pokémon]]'' anime another, and each "spinoff" game its own separate [[{{Pun}} pocket]] universe. This doesn't stop the anime from periodically passing through other continuities, though:
** ''VideoGame/PokemonRedAndBlue'': Despite being a canon game, the third of the trio, ''Special Yellow Pikachu Edition'', uses the anime designs instead of the ones from ''Red'' and ''Blue''/''Green''. This includes replacing the generic Team Rocket grunts with Jessie and James (and Meowth). The main character is locked into a Pikachu as a starter instead of being able to choose from Bulbasaur/Charmander/Squirtle, like Ash did in the anime, and starting off the rival with Eevee, just like Gary did.
** ''VideoGame/PokemonSunAndMoon'': Special "Ash's Cap" Pikachus were given out for the 20th anniversary of the franchise, as well as for a tie-in with the ''I Choose You'' movie. Meanwhile, a Greninja with the Ash-Greninja ability from the anime was given out as a thank-you for playing the game's demo. These Pokémon also showed up in ''Pokémon Shuffle'' and ''Tretta''.
** ''VideoGame/DetectivePikachu'': Tim and Detective Pikachu briefly run into another Pikachu early on in the game. A line of dialogue implies it's [[Anime/{{Pokemon}} Ash's Pikachu]], specifically:
--->'''Detective Pikachu:''' "Tell your buddy to [[WaxingLyrical be the best]], [[DiegeticSoundtrackUsage like no one ever was]]."
* If it's a ''VideoGame/{{Bomberman}}'' work, chances are ''VideoGame/PowerBomberman'' has represented it in some way, mainly through characters. It doesn't just limit itself to the main series of games either, as it also takes from the spin-offs, cancelled titles, the various manga, the two anime series (''Anime/BombermanBDamanBakugaiden'' and ''Anime/BombermanJetters''), and even promo art.
* For Franchise/FireEmblem'', there were ''two'' attempts to make a crossover from all over the franchise in 2017. [[VideoGame/FireEmblemWarriors One]] is a ''[[VideoGame/DynastyWarriors Musou]]''-[[HackAndSlash styled]] game featuring characters from [[VideoGame/FireEmblemShadowDragonAndTheBladeOfLight Arch]][[VideoGame/FireEmblemMysteryOfTheEmblem anea]], [[VideoGame/FireEmblemAwakening Ylisse]], [[VideoGame/FireEmblemFates Hoshido, and Nohr]] along with two girls from [[VideoGame/FireEmblemGaiden Valentia]] and [[VideoGame/FireEmblemTheBindingBlade Eli]][[VideoGame/FireEmblemTheBlazingBlade be]] respectively and a few OriginalGeneration people. [[VideoGame/FireEmblemHeroes The other]] is a gacha that has a more complex variety of characters, not only adding units from the previously mentioned worlds, but also from other worlds like [[VideoGame/FireEmblemGenealogyOfTheHolyWar Jug]][[VideoGame/FireEmblemThracia776 dral]], [[VideoGame/FireEmblemTheSacredStones Magvel]], [[VideoGame/FireEmblemPathOfRadiance Tell]][[VideoGame/FireEmblemRadiantDawn ius]], [[VideoGame/FireEmblemThreeHouses Fódlan]], and even ''freaking [[VideoGame/TokyoMirageSessionsFE Tokyo]]''.

* An Main/InUniverse example happens in ''WesternAnimation/TheFairlyOddParents''. In the episode "The Crimson Chin meets Mighty Mom and Dyno Dad", the Crimson Chin meets several wildly different versions of his EraSpecificPersonality, from the 30s pulp-fiction Chin, to the "super-edgy" 1985 Chin, who got cancelled for swearing.

* ''Film/SpiderManNoWayHome'': This film ended up being a crossover between every live-action movie iteration of Spider-Man to ever appear, where Peter Parker accidentally causes Doctor Strange to open up TheMultiverse, causing villains from the previous ''Spider-Man'' films to enter the MCU. These include from Raimi's ''Film/SpiderManTrilogy'': Green Goblin, Doctor Octopus, and Sandman, and from ''Film/TheAmazingSpiderManSeries'': Lizard and Electro. And the Spider-Men also came to allow for an AllianceOfAlternates! All this with RoleReprise from the original actors.

[[quoteright:350:[[Franchise/TeenageMutantNinjaTurtles https://static.tvtropes.org/pmwiki/pub/images/turtlesforever9.png]]]]
[[caption-width-right:350:[[WesternAnimation/TurtlesForever In this instance]], [[WesternAnimation/TeenageMutantNinjaTurtles1987 1987]] meets [[WesternAnimation/TeenageMutantNinjaTurtles2003 2003]], with a pinch of [[ComicBook/TeenageMutantNinjaTurtlesMirage 1984]].]]

* In ''WesternAnimation/TheFairlyOddParents'' episode "The Crimson Chin meets Mighty Mom and Dyno Dad", the Crimson Chin meets several wildly different versions of his EraSpecificPersonality, from the 30s pulp-fiction Chin, to the "super-edgy" 1985 Chin, who got cancelled for swearing.

* ''Film/SpiderManNoWayHome'': This film ended up being a crossover between every live-action movie iteration of Spider-Man to ever appear, where Peter Parker accidentally causes Doctor Strange to open up TheMultiverse, causing villains from the previous ''Spider-Man'' films to enter the MCU. These include from Raimi's ''Film/SpiderManTrilogy'': Green Goblin, Doctor Octopus, and Sandman, and from ''Film/TheAmazingSpiderManSeries'': Lizard and Electro. And the Spider-Men also came to allow for an AllianceOfAlternates! All this with RoleReprisal from the original actors.

*** The Final Boss is [[spoiler:both Classic and Modern Sonic uniting themselves and using the Chaos Emeralds to fight the Time Eater, alongside Modern Dr. Eggman and Classic Dr. Eggman, who is called Dr. Robotnik by Classic Tails, [[LampshadeHanging until he points no one calls him that anymore]]].

* ''VideoGame/FateGrandOrder'' pulls from all over the ''Franchise/FateSeries'', including its alternate universes (''[[Anime/FatePrototype Prototype]]'' and the universe Musashi comes from, for starters), offshoot timelines (''[[VisualNovel/FateHollowAtaraxia Hollow Ataraxia]]'', ''[[VideoGame/FateExtra EXTRA]]''), and even its gag series (''Koha-Ace'' and ''[[Webcomic/LearningWithMangaFGO Learning with Manga!]]''). Unfortunately not everyone could make it to the game, as most of the cast of ''[[Literature/FateStrangeFake strange fake]]'' is on embargo until it wraps up.

** Its sequel, ''VideoGame/PersonaQ2NewCinemaLabyrinth'', reunites the ''P3'' and ''P4'' casts on top of bringing in [[VideoGame/Persona5 the Phantom Thieves of Hearts]] ''and'' the female protagonist exclusive to ''Persona 3 [[UsefulNotes/PlayStationPortable Portable]]'' (who is implied to be an AlternateSelf to [[CuttingOffTheBranches her mainline counterpart]]). While the same Timey-Wimey shenanigans ensue [[spoiler:once again thanks to the ''P3'' protagonist's canonical death (as well as the fact that ''P5'' is at least a few years farther along in the timeline than ''P4'' was)]], [[spoiler:Joker, the PlayerCharacter of ''5'' and ''Q2'', appears to be the ''only'' character with RippleEffectProofMemory after returning to his time, as he recognizes [[OriginalGeneration Hikari]] while attending a high school film festival in the epilogue]].

** ''ComicBook/SpiderVerse'' is a major example based on the Spider-Man character; promising "Every Spider-Man Ever", it's a comic-book arc focused around the many different versions of the hero, joining forces in a quest to fight a villain who wants to wipe out all of them. Along with the multiple Spider-Men from comics, ranging from alternate universes, alternate timelines, alternate identities and other superheroes that also have a spider theme, they also mixed in other Spider-Men from animated and live-action series, manga and videogames.

* ''VideoGame/SonicTheHedgehog'':

*** The game features the modern Sonic from the Dreamcast era, that was redesigned with green eyes, longer legs and smaller belly, meeting through time travel the classic Sonic from the Genesis/Mega Drive era who is pudgy, has black eyes and short legs, and also never talks.

*** The game features levels based on all main series games, dividing them up into three categories, Classic (Genesis/Mega Drive era), Dreamcast (includes ''VideoGame/SonicHeroes'') and Modern. Back are iconic level themes like Green Hill Zone and Chemical Plant Zone, and also modern levels like City Escape and Seaside Hill, and all levels are divided in two parts for the two characters, modern levels and their gimmicks are adapted for the pure 2D classic gameplay, and classic levels are adapted with gimmicks from the 3D games for the modern gameplay.

*** The Final Boss is [[spoiler: both Classic and Modern Sonic uniting themselves and using the Chaos Emeralds to fight the Time Eater, alongside Modern Dr. Eggman and Classic Dr. Eggman, who is called Dr. Robotnik by Classic Tails, until he points no one calls him that anymore]].
** Classic Sonic and Modern Sonic once again team up in the sequel game ''VideoGame/SonicForces'', the [[Videogame/SonicMania other part]] of the [[MilestoneCelebration 25th anniversary celebration]] of the franchise, in which the player can choose between 3 different styles, Classic Sonic style, Modern Sonic style and an [[PlayerCharacter Avatar]] style, a mode in which the player can create his own character.
*** However, ''Sonic Forces'' retcons ''Sonic Generations'' by stating that Classic Sonic is not Sonic from the past, and is instead another Sonic from another dimension, [[FanDislikedExplanation something fans were not pleased]].

* Commonly seen in ''VideoGame/{{MUGEN}}'', in which you can make the roster as you like, so you can put the same character from different games in the same created fighting game you like. As example, you can put [[Franchise/StreetFighter Ryu]] from ''VideoGame/StreetFighterII'', ''VideoGame/StreetFighterAlpha'', ''VideoGame/MarvelVsCapcom'' series, ''VideoGame/SNKVsCapcomSVCChaos'', ''[[VideoGame/SNKVsCapcom Capcom vs. SNK]]'' series and even ''VideoGame/StreetFighterI'' in the same roster and make them fight against each other.

** In some other media apart of video games, this is commonly seen when VideoGame/{{Mega Man|Classic}} meets [[VideoGame/MegaManX X]], like in an episode of the ''WesternAnimation/MegaMan'' American series and in one of the ''ComicBook/MegaManArchieComics'' comics.
** In ''VideoGame/MegaManII'', there's Quint, a Mega Man from the future that was brought to the present and modified by Dr. Wily to be one of "Mega Man Killers", who also returns in future games of the Classic franchise.
** Also seen in various of ''VideoGame/CapcomVs'' games in which various Mega Man versions (or characters from different game series) can be seen together, like ''VideoGame/SNKVsCapcomCardFightersClash'' series in which you can see Character cards of all MM games in the same deck. Another good example is ''VideoGame/TatsunokoVsCapcom'' in which [[VideoGame/MegaManLegends Rock Volnutt]] is in the same places than [[VideoGame/MegaManClassic Roll]].

* ''VideoGame/PersonaQShadowOfTheLabyrinth'' is a non-canon game featuring the playable characters from ''VideoGame/Persona3'' and ''VideoGame/Persona4''. Oddly, despite the original games being only a few years apart in places so close that characters from ''4'' have visited the setting of ''3'', this game still had to resort to [[TimeyWimeyBall Timey Wimey shenanigans]] due to [[spoiler:the protagonist's death at the end of ''Persona 3''.]]
* ''{{Franchise/Pokemon}}'': The "core" games are generally treated as one continuity, the long-running ''Anime/{{Pokemon}}'' anime another, and each "spinoff" game its own separate [[{{Pun}} pocket]] universe. This doesn't stop the anime from periodically passing through other continuities, though:

-->'''Detective Pikachu:''' "Tell your buddy to [[WaxingLyrical be the best]], [[DiegeticSoundtrackUsage like no one ever was]]."

* ''Franchise/FireEmblem'': Then were ''two'' attempts to make a crossover from all the franchise in the same year (2017), [[VideoGame/FireEmblemWarriors one]] is a musou featuring characters from [[VideoGame/FireEmblemShadowDragonAndTheBladeOfLight Archanea,]] [[VideoGame/FireEmblemAwakening Ylisse,]] [[VideoGame/FireEmblemFates Nohr, Hoshido]], two girls from [[VideoGame/FireEmblemGaiden Valentia]] and [[VideoGame/FireEmblemElibe Elibe]] respectively, and a few OriginalGeneration people and [[VideoGame/FireEmblemHeroes the other]] is a gacha that have a more complex variety. Not only adding characters from the previously mentioned worlds, but also characters from other worlds like [[VideoGame/FireEmblemJugdral Jugdral]], [[VideoGame/FireEmblemTellius Tellius]], [[VideoGame/FireEmblemTheSacredStones Magvel]], [[VideoGame/FireEmblemThreeHouses Fodlan]], and even ''freaking'' [[VideoGame/TokyoMirageSessionsFE Tokyo]].

** There's also ''ComicBook/TheButton'' and ''ComicBook/DoomsdayClock'' which featured [[SlidingScaleOfIdealismVsCynicism the ultimate confrontation of idealism and cynicism]]; Franchise/{{Superman}} vs. [[ComicBook/{{Watchmen}} Dr. Manhattan]].

** And going even further backward, it all started with ''[[Franchise/TheFlash Flash Of Two Worlds]]'', in which Earth-1 Flash (Barry Allen) first encountered Earth-2 Flash (Jay Garrick) after Barry accidentally crossed the "vibration barrier" between [[AlternateUniverse dimensions]]. This was just the start of the CrisisCrossover events DC would have across all of its history.

* ''ComicBook/GhostbustersIDWComics'': after a crossover with the ''Franchise/TeenageMutantNinjaTurtles'' taught them how to travel the multiverse, the original Film/{{Ghostbusters|1984}} from the 1984 movie encountered those from WesternAnimation/TheRealGhostbusters cartoon. In a sequel, the crossovers expanded to include the [[Film/Ghostbusters2016 remake]], WesternAnimation/ExtremeGhostbusters, and several video game versions.

* The ''Comicbook/{{Judge Dredd}}'' story "Trinity" sees Dredd pulled into an {{alternate universe}}, where he has to team up with his counterparts from [[Film/{{Judge Dredd}} both]] [[Film/{{Dredd}} movies]] to catch the perp and return home.

* ''[[https://www.fanfiction.net/s/3293028/1/Carefree Carefree]]'' is a ''Sonic The Hedgehog'' {{crossover}} oneshot where [=SegaSonic=] canon meets ''Sonic The Comic'' canon. Fleetway's Sonic gets stranded on [=SegaSonic=]'s Earth. He's surprised by how different their Sonic is and how more carefree he seems.

[[caption-width-right:350:[[WesternAnimation/TurtlesForever In this instance]], [[WesternAnimation/TeenageMutantNinjaTurtles1987 1987]] meets [[WesternAnimation/TeenageMutantNinjaTurtles2003 2003]], with a pinch of [[ComicBook/TeenageMutantNinjaTurtlesMirage 1984]]]]

* The final episode of ''WesternAnimation/Ben102016'' was ''Alien X-Tinction'', a one-hour special that had Ben team up with the all the differently-aged versions of himself from the "Classic" continuity, the version of Gwen who got the TransformationTrinket instead.

* ''Fanfic/ArcRoyale'' is a rare example of a fanfic author doing this with their own fics. In it, the Gods are tired of watching the stalemate between Oz and Salem, and decide it would be more interesting to have the matter settled via a combat of champions. In supposed interest of fairness, the main combatants are all various incarnations Jaune Arc, the weakest member of the main cast, each hailing from one of Creator/CoeurAlAran's many ''WebAnimation/{{RWBY}}'' AU fics, and bonded to one of the other characters. Each one comes from various points within their own stories as well; for example, "[[Fanfic/ForgedDestiny Knight Jaune]]" comes from the epilogue of his story, while "[[Fanfic/NotThisTimeFate Fate Jaune]]" comes from the middle of his.

* ''WesternAnimation/Ben102016'' had TheMovie ''Alien X-Tinction'' which includes Bens representing each show in the franchise, plus the version of Gwen who got the TransformationTrinket instead.

* In ''WesternAnimation/TheFairlyOddParents'' episode "The Crimson Chin meets Mighty Mom and Dyno Dad", the Crimson Chin meets several wildly different versions of his EraSpecificPersonality, from the 30s pulp-fiction Chin, to the "super-edgy" 1985 Chin, who got cancelled for swearing.

* The ''WesternAnimation/JusticeLeague'' episode "Legends" was [[WhatCouldHaveBeen initially intended]] to feature the Comicbook/JusticeSocietyOfAmerica. [[ExecutiveMeddling The rights weren't cleared]] (possibly because the superheroes involved were portrayed as [[InnocentBigot somewhat bigoted]]), so the writers instead used a CaptainErsatz version called "The Justice Guild".

* ''WesternAnimation/SpiderManIntoTheSpiderVerse'': Just like in ''ComicBook/SpiderVerse'', the movie is about Spider-Men from different universes fighting together against an enemy in common and struggling to get back to their own dimensions.

* Predating ''ComicBook/SpiderVerse'' by decades, ''WesternAnimation/SpiderManTheAnimatedSeries'' has the "Spider Wars", in which Madame Web (and later the Beyonder) first recruited Spider-Man from the main universe of the series and later recruited various alternate versions of him, including [[http://marvel.wikia.com/wiki/Spider-Armor_MK_I Armored Spider-Man]] (a kind of "[[ComicBook/IronMan Tony Stark]]" version of Peter Parker), Six-Armed Spider-Man (a mutated version of him that permanently has six arms, seen in comics and the same series but GoneHorriblyWrong), Spider-Man with ComicBook/DoctorOctopus' arms (also predating ''ComicBook/SuperiorSpiderMan'' by decades), Spider-Man [[Creator/TobeyMaguire as]] [[Creator/AndrewGarfield an]] [[Creator/TomHolland actor]], and even the ComicBook/ScarletSpider (Ben Reilly as in ''ComicBook/TheCloneSaga''). This group is simply named the ''[[http://marvel.wikia.com/wiki/Spider-Men_(Multiverse) Spider-Men]]''.

* ''WesternAnimation/UltimateSpiderMan'' did their own version of Spider-Verse (once again preceding ''Into the Spider-Verse'' by five years) by having Peter interact with Noir, Spider-Ham, 2099, Spyder-Knight, Spider-Girl (in this case though, a genderflip version of him named Petra Parker) and Miles Morales (who made his animated debut with this show). It even got a sequel in which the obscure Blood-Spider and Spider-Gwen (likewise making her animated debut here) got to join the fun.

* ''Film/SpiderManNoWayHome'': This film ended up being a crossover between every live-action movie iteration of Spider-Man to ever appear, where Peter Parker accidentally causes Doctor Strange to open up TheMultiverse, causing villains from the previous ''Spider-Man'' films to enter the MCU. These include from Raimi's ''Film/SpiderManTrilogy'': Green Goblin, Doctor Octopus, and Sandman, and from ''Film/TheAmazingSpiderManSeries'': Lizard and Electro. All of the previous actors will have RoleReprisal for this massive event.

* ''VideoGame/PersonaQ'' is a non-canon game featuring the playable characters from ''VideoGame/Persona3'' and ''VideoGame/Persona4''. Oddly, despite the original games being only a few years apart in places so close that characters from ''4'' have visited the setting of ''3'', this game still had to resort to [[TimeyWimeyBall Timey Wimey shenanigans]] due to [[spoiler:the protagonist's death at the end of ''Persona 3''.]]

* ''Franchise/FireEmblem'': Then were ''two'' attempts to make a crossover from all the franchise in the same year (2017), [[VideoGame/FireEmblemWarriors one]] is a musou featuring characters from [[VideoGame/FireEmblemShadowDragonAndTheBladeOfLight Archanea,]] [[VideoGame/FireEmblemAwakening Ylisse,]] [[VideoGame/FireEmblemFates Nohr, Hoshido]], two girls from [[VideoGame/FireEmblemGaiden Valentia]] and [[VideoGame/FireEmblemElibe Elibe]] respectively, and a few OriginalGeneration people and [[VideoGame/FireEmblemHeroes the other]] is a gacha that have a more complex variety. Not only adding characters from the previously mentioned worlds, but also characters from other worlds like Jugdral, Tellius, Magvel, Fodlan, and even ''freaking'' [[VideoGame/TokyoMirageSessionsFE Tokyo]].

* ''Film/SpiderManNoWayHome'': This film ended up being a crossover between every live-action movie iteration of Spider-Man to ever appear, where Peter Parker accidentally causes Doctor Strange to open up TheMultiverse, causing villains from the previous ''Spider-Man'' films to enter the MCU. These include from Raimi's ''Film/SpiderManFilmTrilogy'' Green Goblin, Doctor Octopus, and Sandman. From ''Film/TheAmazingSpiderMan'' duo: Lizard and Electro. All of the previous actors will have RoleReprisal for this massive event.

[[folder:Films -- Animation]]

* ''Fanfic/ArcRoyale'' is a rare example of a fanfic author doing this with their own fics. In it, the Gods are tired of watching the stalemate between Oz and Salem, and decide it would be more interesting to have the matter settled via a combat of champions. In supposed interest of fairness, the main combatants are all various incarnations of the weakest member of the main cast (Jaune Arc) dragged from their worlds and bonded to the other characters, with these various incarnations all hailing from Creator/CoeurAlAran's multitude of ''WebAnimation/{{RWBY}}'' AU fics.