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4[[quoteright:350:[[VideoGame/SuperSmashBrosMelee https://static.tvtropes.org/pmwiki/pub/images/supersmashbros.png]]]]
5[[caption-width-right:350:Let's see... ''Franchise/FireEmblem'', ''VideoGame/YoshisIsland'', ''Franchise/{{Pokemon}}'', ''Franchise/SuperMarioBros'', ''Franchise/DonkeyKong'', ''VideoGame/{{EarthBound|1994}}'', ''Franchise/TheLegendOfZelda'', ''Franchise/StarFox'', ''Franchise/{{Metroid}}'', ''VideoGame/FZero'', ''Franchise/{{Kirby}}'', ''VideoGame/GameAndWatch'', and ''VideoGame/IceClimber''. All in just one game, and this game isn't even [[VideoGame/SuperSmashBrosUltimate the best example]] from [[VideoGame/SuperSmashBros its franchise]].]]
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11
12->''"So many heroes from so many dimensions! This is pretty cool!"''
13-->-- '''[[WesternAnimation/MyLifeAsATeenageRobot Jenny Wakeman]]''', ''[[VideoGame/NicktoonsUnite Nicktoons: Attack of the Toybots]]''
14
15A {{crossover}} that involves characters from more than two works of {{fiction}}. More often than not, this is a mash up of series which do not have a strict sense of continuity or a clear UniverseBible. To lessen {{canon}}-faulting, especially with series that do have strict continuity, [[CrossoverAlternateUniverse a new 'neutral' setting]] is made that offers equal footing for all the characters. Sometimes characters are anthropomorphise in various ways so that they can interact better. It also becomes more viable the farther you get from canon, such as one-time TV specials and especially video games. As {{Story Arc}}s have become more prevalent, this practice has somewhat lessened, with shifts to strict [[TheVerse Verse]] building and explicit references.
16
17This rarely occurs in live action shows, unless a production company can be formed that holds copyrights to everything, or where {{Public Domain Character}}s and/or ProductPlacement from different companies are involved. Thus, this is much more common in animated works -- although you can generally expect Creator/TheBBC to pull one out of somewhere when Series/ChildrenInNeed or UsefulNotes/ComicRelief rolls around.
18
19This trope has become increasingly common in video games, especially those involving both licensed and original properties. These games, depending on how far or how deep they mine, can have interesting effects on the fiction chosen. Many long-gone and/or forgotten HumongousMecha shows, for example, often get a new lease on life, or even a brand-new sequel or remake, after making an appearance or two in a ''VideoGame/SuperRobotWars'' game. Similarly, the ''Franchise/FireEmblem'' series was finally brought over to the US to great success after two of its characters made an appearance as unlockable fighters in ''VideoGame/SuperSmashBrosMelee''. Crossing over with RealLife, {{Racing Game}}s with licensed vehicles (such as ''VideoGame/{{Forza}}'', ''VideoGame/GranTurismo'' or ''VideoGame/NeedForSpeed'') are always this trope, due to the fact multiples of vehicles are licensed from wildly different manufacturers for use in-game.
20
21And it should be clear that this trope is trivially easy to pull off in FanFic, since fan-fiction is almost always unlicensed and unofficial, meaning the creators are free to put whatever characters they want, from as many (often wildly) different universes as they want, and however they want into their stories without worrying about those pesky trademarks and character licensing issues getting in the way. That said, it's much rarer to [[SturgeonsLaw pull off this trope]] ''[[SturgeonsLaw well]]'' in fan-fiction.
22
23The name is a pun on the video game genre of "[[MassivelyMultiplayerOnlineGame massive(ly) multiplayer online game]]".
24
25This trope is OlderThanFeudalism. The ''Argonautica'' by Apollonius Rhodius (3rd century BCE) features nearly every ancient Greek mythical hero all going on a quest to find the Golden Fleece.
26
27{{Sub Trope}}s:
28* CrisisCrossover (a company-wide Massive Multiplayer Crossover)
29** CrossThrough (a company-wide event that affects every series involved without having them cross over)
30* DeconstructionCrossover (when the main purpose of using a Massive Multiplayer Crossover is {{Deconstruction}})
31* FairyTaleFreeForAll (a crossover of characters from classic fairy tales)
32* MonsterMash (classical movie monsters)
33* UltimateShowdownOfUltimateDestiny (When the Massive Multiplayer Crossover meets LetsYouAndHimFight)
34** MascotFighter (the FightingGame version)
35
36See also PowerCreepPowerSeep and StoryBreakerTeamUp. AllStoriesAreRealSomewhere is related.
37----
38!!Examples:
39
40[[index]]
41* MassiveMultiplayerCrossover/FanWorks
42* MassiveMultiplayerCrossover/{{Literature}}
43* MassiveMultiplayerCrossover/LiveActionTV
44* MassiveMultiplayerCrossover/{{Music}}
45* MassiveMultiplayerCrossover/VideoGames
46* MassiveMultiplayerCrossover/WebComics
47[[/index]]
48
49[[foldercontrol]]
50
51[[folder:Advertising]]
52* A [=MasterCard=] [[https://www.youtube.com/watch?v=xtRBpu-OjF4 commercial]] featured several food mascots (from Count Chocula to the Pillsbury Doughboy) eating dinner -- with Mr. Clean doing the dishes.
53* USA Network's commercials play this for laughs, having various combinations of characters from their shows (''Burn Notice'', ''Monk'', ''Psych'', others) encounter each other and make idle conversation.
54* UK example: [[https://www.youtube.com/watch?v=BCfGC_dGn4M The Greatest Minds In Advertising Join Forces]] in a 2009 viral for ''UsefulNotes/ComicRelief''.
55* [[https://www.youtube.com/watch?v=KnD8BYjZiW0 "We Are Family": A Musical Message for All]] uses clips from ''over 100'' TheNineties-TurnOfTheMillennium children's television shows[[note]] Specifically those from ''Creator/{{Nickelodeon}}'', ''Creator/DisneyChannel'', and ''Creator/PBSKids''.[[/note]] and have them sync with a cover of "We Are Family" by the Sledge Sisters. In other words, Generation Z nostalgia.
56* The Advertising/MetLife insurance company has released an [[https://www.youtube.com/watch?v=0blgtGvrz0A ad]] featuring characters from ''Franchise/{{Peanuts}}'', ''WesternAnimation/{{Looney Tunes}}'', ''Creator/HannaBarbera'', ''Creator/{{Filmation}}'', and many other animation studios.
57* One Krystal ad had [[CaptainErsatz lawyer-friendly parodies]] of the Wendy's girl, [[UsefulNotes/McDonalds Ronald McDonald]], and Advertising/TheBurgerKing passing up NoCelebritiesWereHarmed / BlandNameProduct versions of their respective restaurants to get some food from Krystal.
58* The [[https://www.youtube.com/watch?v=MuATW92bpmc Origin promo]] for Creator/ToonamiAsia seems to imply this, as we're shown characters from ''WesternAnimation/JusticeLeagueUnlimited'', ''Franchise/Ben10'', and ''WesternAnimation/GeneratorRex'' all existing in the same universe, before the end of the Age of Superheroes happened.
59* Creator/AardmanAnimations made a [[https://www.youtube.com/watch?v=d9Hrx6ohGKk Google+ Hangout commercial]] for Christmas 2012 that featured WesternAnimation/WallaceAndGromit making a conference call with [[WesternAnimation/ChickenRun Ginger]], [[WesternAnimation/CreatureComforts Captain Cuddlepuss and Trixie, the robins]], [[WesternAnimation/ShaunTheSheep Shaun's flock]], and [[WesternAnimation/AMatterOfLoafAndDeath Piella and Fluffles]].
60* A 2019 ad for Walmart's pickup service featured a plethora of pop culture cars from the [[ComicBook/{{Batman}} Batmobile]], [[Franchise/{{Ghostbusters}} Ecto 1]], K*I*T*T* from ''Series/KnightRider'', a [[Film/JurassicPark Ford Explorer]], [[Franchise/{{Cars}} Lightning McQueen]], the [[Film/{{DumbAndDumber}} Mutts Cutz van]], the [[Film/NationalLampoonsVacation Griswold family station wagon]], and many, many more.
61* To hype up the change over to a brand new streaming service style, Creator/ParamountPlus, ahead of its rebrand from CBS All Access, began a series of commercials with the stars from various series -- live-action, animated, puppet or otherwise -- climbing the Paramount Mountain and the various hijinx they get into, narrated, and later revealed to be all planned by Sir Creator/PatrickStewart.
62* ''Advertising/ItsThinking'': The ads depict the various first/second-party characters and some third-party characters interacting with each other inside a [[Platform/SegaDreamcast Dreamcast]].
63[[/folder]]
64
65[[folder:Anime and Manga]]
66* Several of the early magical girls, such as "Anime/CreamyMamiTheMagicAngel" had crossovers with multiple other magical girls in some of their OVAS.
67* The ''Manga/GiantRobo'' OVA series featured characters taken from several other series Misuteru Yokoyama -- the original creator of ''Giant Robo''/''Johnny Sokko and His Flying Robot'' -- had written. This included adaptations ''Literature/RomanceOfTheThreeKingdoms'' and ''The Water Margins'', which led to many main and secondary characters in ancient Chinese clothing coexisting with people in three-piece suits TwentyMinutesIntoTheFuture. It also included the very first MagicalGirl, ''Mahotsukai Sally'' (''Sally, the Witch''), under her original name "Sunny", as Shockwave Alberto's daughter.
68* Legendary Manga creator Creator/OsamuTezuka similarly uses {{Reused Character Design}}s in his "Star System", wherein a character from a previous work will actually play a different role in another story, [[AnimatedActors as if they were an actor or actress]].
69* ''[[http://www.bedetheque.com/Couvertures/DragonFall5_17022007.jpg DragonFall]]'' blended ''Franchise/DragonBall'', ''Franchise/StarWars'' and [[http://fr.wikipedia.org/wiki/Dragon_Fall a whole bunch of other series]] into a parody. With mixed results.
70* The intro to the Creator/RumikoTakahashi gallery show ''[[https://www.youtube.com/watch?v=kf953nWYSlA It's a Rumic World]]'' explicitly crosses over ''Manga/RanmaOneHalf, Manga/UruseiYatsura,'' and ''Manga/InuYasha''.
71* ''Manga/TsubasaReservoirChronicle'' has the characters jumping from AlternateUniverse to AlternateUniverse filled with Creator/{{CLAMP}} characters from their various series. Amusingly, save a select few examples, mostly as [[TheCameo cameos]], the Alternate Universes are hardly ever populated by ''actual'' CLAMP characters, but AlternateUniverse ''instances'' of them. Their first crossover happened in ''Clamp Campus Detectives'' since the three main character were in series/stories on their own before CCD: Nokoru Imonoyama in Duklyon, Akira Ijuin in ''20 Mask ni Onegai'' (Man of Twenty Masks) and supposedly Suou Takamura showed up in an old oneshot. Then there was ''X/1999'' where characters from past CLAMP series started appearing, including Subaru, the main character of ''Manga/TokyoBabylon'', as a major character, and during his series set in the early 90s it was said that he would have a role in TheEndOfTheWorldAsWeKnowIt that is X, making for a bit of {{foreshadowing}}.
72* ''Anime/ShatteredAngels'' is primarily a crossover of the mangaka and studio's previous works: ''Manga/DestinyOfTheShrineMaiden'', ''Anime/SteelAngelKurumi'', ''Manga/MagicalMeowMeowTaruto'', and ''Manga/UFOPrincessValkyrie''.
73* Before ''Dengeki Gakuen RPG: Cross of Venus'' (mentioned below), there was [[https://www.youtube.com/watch?v=0CksYnT1qO8 this animated short]] produced for Dengeki Bunko's 2007 Movie Festival, featuring chibi versions of characters from ''Literature/KinosJourney'', ''Literature/{{Inukami}}'' and ''Literature/ShakuganNoShana'' (note that the chibi Shana here is '''not''' [[{{Omake}} Shana-tan]]; for one, ''she'' is the stalker rather than said omake series' Kazumi).
74* While most Creator/GoNagai series contain cameos here and there, ''Anime/ShinMazinger'' goes the whole way. Characters from several alternate versions of ''Anime/MazingerZ'' show up, as well as characters from ''Manga/ViolenceJack'' (itself a DeconstructionCrossover) and the title demon from ''Manga/DemonLordDante''. Unsurprisingly, this series is being directed by the same man behind ''Giant Robo'', Yasuhiro Imagawa.
75** ''Anime/CBCharaGoNagaiWorld'' is a crossover which features SD versions of ''Anime/MazingerZ'', ''Manga/{{Devilman}}'', and ''Manga/ViolenceJack'', with in-story explanations for the characters being SD, and with plenty cameos (such like ''Anime/UFORoboGrendizer'', ''Anime/KotetsuJeeg'' and ''Manga/GetterRobo'').
76** Go Nagai has been doing this for a loooong while. Back in the seventies several movies were made by Toei crossing ''Anime/MazingerZ'' with ''Manga/{{Devilman}}'', ''Anime/GreatMazinger'' with ''[[Manga/GetterRobo Getter Robo and Getter Robo G]]'' or ''Anime/UFORoboGrendizer'', or several of them together.
77** ''Manga/SuperRobotRetsuden'', with story and art by Creator/KenIshikawa, is an AffectionateParody of those movies. ''Anime/MazingerZ'', ''Anime/GreatMazinger'', ''Anime/UFORoboGrendizer'', ''Manga/GetterRobo'' and ''Anime/KotetsuJeeg'' characters join their forces to face an EldritchAbomination.
78** And the ''Dynamic Heroes'' e-manga is a {{Crossover}} featuring ''Anime/MazingerZ'', ''Anime/GreatMazinger'', ''Anime/UFORoboGrendizer'', ''[[Manga/GetterRobo Getter Robo, Getter Robo G]]'', ''Manga/{{Devilman}}'' AND ''Anime/CuteyHoney''.
79* The ''Anime/PrettyCureAllStars'' movie series allows the Cures from the past seasons to meet (and be friends with) the new team.
80* About a week after the debut of the film ''Anime/DragonBallZBattleOfGods'', Goku and his friends turned up in the latest annual ''Manga/OnePiece'' and ''Manga/{{Toriko}}'' crossover episode.
81* Creator/KazumaKamachi has multiple crossovers of his own works, including ''Literature/ACertainMagicalIndex'', ''Literature/HeavyObject'', ''Literature/TheZashikiWarashiOfIntellectualVillage'', ''Literature/TheCircumstancesLeadingToWaltrautesMarriage'', ''Literature/ASimpleSurvey'', ''Literature/TheUnexploredSummonBloodSign'' and ''Literature/TheWeaknessOfBeatriceTheLevelCapHolySwordswoman''. One example is ''The Circumstances Leading to a Certain Magical Heavy Zashiki Warashi’s Simple Killer Princess's Marriage''.
82* In ''Anime/TheSnowQueen2005'', a lot of references and adaptations of Creator/HansChristianAndersen are included.
83* ''Anime/YattermanNight'' takes place in a continuity where various characters created by Creator/TatsunokoProduction (or at least [[{{Expy}} approximations of them]]) exist in a shared universe. Even the [[Anime/SpeedRacer Mach 5]] appears!
84* ''Anime/RobotGirlsZ'' combines this with MoeAnthropomorphism by having Mecha Musume versions of Toei's super robots. The leads are girl versions of Mazinger Z, Grendizer, and Great Mazinger, with supporting casts from Getter Robo and Steel Jeeg. The second season then proceeds to add robots from Getter Robo and Gai-king. The show itself is a SliceOfLife comedy with the wacky antics of both the Robot Girls Z and their rivals (Robot Girl versions of Doctor Hell's minions).
85* Starting with episode 7, the cast of ''Anime/SpacePatrolLuluco'' travels around the universe visiting planets based on other Creator/StudioTrigger works ''Franchise/KingdomHearts'' style.
86* The Arabic TV channel Creator/{{Spacetoon}} produced a play that crossed over ''Anime/PokemonTheSeries'' and ''Manga/CaseClosed''. [[NotMakingThisUpDisclaimer No seriously]], [[https://www.youtube.com/watch?v=rVzXIWz1zgY they did]]. And there's a GreenAesop for some bizarre reason.
87* ''Anime/IsekaiQuartet'' is a comedic take with TrappedInAnotherWorld works from Kadokawa Corporation, featuring the casts from ''[[Literature/KonoSuba KonoSuba: God's Blessing in this Wonderful World!]]'', ''[[Literature/Overlord2012 Overlord]]'', ''[[Literature/ReZero Re:Zero - Starting Life in Another World]]'', and ''Literature/TheSagaOfTanyaTheEvil'' being transported to another world... To attend high school while animated in an unified chibi style. Season 2 also adds the protagonists of ''Literature/TheRisingOfTheShieldHero'' as part of the secondary cast, with characters from ''[[Literature/TheHeroIsOverpoweredButOverlyCautious Cautious Hero: The Hero Is Overpowered but Overly Cautious]]'' appearing as cameos.
88* ''Anime/DaiconIIIAndIV'' feature an extensive amount of characters and objects from other media (used without permission). ''Franchise/StarWars'', ''Literature/StarshipTroopers'', ''Franchise/StarTrek'', ''Literature/TheElricSaga'', ''Series/{{Ultraman}}'', ''Franchise/SuperSentai'', and ''Franchise/{{Godzilla}}'' all feature prominently in at least one of the shorts – to say nothing of the shorter cameos, which run the gamut from ''Literature/TheLordOfTheRings'' to ''Anime/UruseiYatsura'' to ''WesternAnimation/WackyRaces''.
89[[/folder]]
90
91[[folder:Audio Plays]]
92* The ''AudioPlay/BigFinishDoctorWho'' "Sixth Doctor and Jamie" series, which is [[spoiler: set entirely in the Land of Fiction]]:
93** ''Night's Black Agents'' is a Scottish Gothic fest, featuring Merodach from "The Brownie of the Black Haggs" by James Hogg, Lucy Ashton from ''The Bride of Lammermoor'' by Sir Creator/WalterScott and Thrawn Janet from the Creator/RobertLouisStevenson story of the same name.
94** ''Legend of the Cybermen'' features the [[Literature/OliverTwist Artful Dodger]], Literature/LittleLordFauntleroy, [[Literature/AlicesAdventuresInWonderland Alice Liddel]], Literature/{{Dracula}},[[Literature/TreasureIsland Long John Silver]] and [[Literature/TwentyThousandLeaguesUnderTheSea Captain Nemo]].
95[[/folder]]
96
97[[folder:Comedy]]
98* There's a ''Franchise/StarTrek''-related comedy routine in which Mr. Spock, [[Film/TwoThousandOneASpaceOdyssey HAL 9000]], and [[Franchise/StarWars Obi-Wan Kenobi]] all appear on ''Jeopardy'', in a mental variant of an UltimateShowdownOfUltimateDestiny. [[spoiler: Kenobi is declared the winner, but only because he uses the JediMindTrick on Alex Trebek.]]
99* Stand-up comedy troupes sometimes feature a series of comedians who usually headline their own shows:
100** ''The Original Kings of Comedy''
101** ''The Blue Collar Comedy Tour''
102** ''The Comedians of Comedy''
103[[/folder]]
104
105[[folder:Comic Books]]
106* ''ComicBook/TheLeagueOfExtraordinaryGentlemen'' has a SuperHero team composed of multiple [[PublicDomainCharacter public domain characters]].
107* ''ComicBook/FutureQuest'' is a six-issue mini-series teaming up the various Creator/HannaBarbera superheroes, including a quite respectful rendition of [[WesternAnimation/JonnyQuest the original Jonny Quest and family]], the serious iterations of {{WesternAnimation/Birdman|1967}} and WesternAnimation/SpaceGhost, a modernized version of WesternAnimation/MightyMightor, a somewhat modernized version of WesternAnimation/FrankensteinJr, a cringeworthy ''modernization'' of WesternAnimation/TheImpossibles, and WesternAnimation/TheHerculoids.
108* ''ComicBook/CrisisOnInfiniteEarths'' was a massive DC multiverse crossover that attempted to pare down the 837,000 alternate Earths (some populated by the superheroes DC Comics had acquired by buying out other comic book companies over the course of 50 years, others created just to resolve DC's own legendary {{Continuity Snarl}}s) into one world, obliterating many "Alternate Earth" characters in the process.
109* ''ComicBook/{{Fables}}'': Just about every PublicDomainCharacter from most Western fairy tales is in this series, with their tales intertwining with everyone else's, as well as quite a few Middle Eastern tales and a few sneaky {{LawyerFriendlyCameo}}s from tales that are still under copyright: Prince Charming, Snow White & the Seven Dwarfs, Beauty & the Beast, ''Literature/TheJungleBook'', the ''Literature/LandOfOz'', ''Literature/TheChroniclesOfNarnia'', ''Literature/TheThreeLittlePigs'', the Frog Prince, ''Literature/TheAdventuresOfPinocchio'' -- and that's a '''short''' list. All of them are living in secret as exiled refugees in New York City.
110* ''ComicBook/CastleWaiting'' is another multiplayer fairy tale crossover, featuring characters from many different tales living together in a castle.
111* ''ComicBook/{{Planetary}}'' is about an investigative super-team in the Creator/{{Wildstorm}} universe. Their members have had run-ins with {{Dracula}}, Franchise/SherlockHolmes, Jenny Sparks from ''ComicBook/TheAuthority'' and multiple versions of ComicBook/{{Batman}}.
112* ''[[ComicStrip/DykesToWatchOutFor The Indelible Alison Bechdel]]'' offered a mash-up of various lesbian and gay comic artists, who threw their characters into the same world for a party. As the mash-up included Diane [=DiMassa=], creator of ''Hothead Paisan: Homicidal Lesbian Terrorist'', the results were hilarious.
113* ''ComicBook/JoeTheBarbarian'' does this in a manner similar to ''The Indian In the Cupboard''.
114* A non-canon ''ComicBook/JudgeDredd'' story in the 1980 ''ComicStrip/DanDare'' annual had Tharg bring all the popular characters currently being published in ''ComicBook/TwoThousandAD'' as well as the Starlord to Dredd's apartment for a surprise party. Then the robots that actually write the comics went on strike, forcing the characters to beat them all up.
115* The Creator/AlanMoore comic ''ComicBook/{{Albion}}'' shoves together a whole bunch of British comic characters of varying obsurity, most of whom are imprisoned by the Government as part of TheMasquerade.
116* ''ComicBook/{{Shi}}[=/=]Cyblade: The Battle for Independents'' featured many independent comic book characters, including ComicBook/{{Cerebus|TheAardvark}}, ComicBook/{{Bone}}, ComicBook/{{Hellboy}}, ComicBook/{{Madman}}, ComicBook/MegatonMan, ComicBook/ScudTheDisposableAssassin, WesternAnimation/TheTick and ComicBook/UsagiYojimbo. Many of the same characters have also appeared in the ComicBook/{{normalman}}/Megaton Man special, ComicBook/{{Gen 13}} ABC and War of the Independents.
117* ''ComicBook/FreddyVsJasonVsAsh'', and its sequel ''Freddy vs. Jason vs. Ash: The Nightmare Warriors''.
118* Creator/DarkHorseComics had ''Franchise/{{Alien}} versus Franchise/{{Predator}} versus Franchise/{{Terminator}}'', ''ComicBook/{{Superman}} and ComicBook/{{Batman}} versus Aliens and Predator'', and two miniseries that crossed over ''ComicBook/{{Witchblade}}'', ''Aliens'', ''ComicBook/TheDarkness'' and ''Predator''.
119* ''ComicBook/FantasticFour: True Story'' has the FF traveling to the realm of fiction, that is attacked by Nightmare, lord of the dreamworld. To fight him they join forces with [[Literature/TheDivineComedy Dante Alighieri]], [[Literature/SenseAndSensibility the Dashwood sisters]], Myth/{{Faust}}, almost all Creator/WilliamShakespeare's protagonists, FrankensteinsMonster, Myth/RobinHood, the Literature/{{Ivanhoe}} cast and others, while Nightmare gains allies in the Sheriff of Nottingham, {{Dracula}} and [[Literature/TreasureIsland Long John Silver]]. Many other characters like Franchise/{{Tarzan}} make cameos and in the end Johnny summons [[LawyerFriendlyCameo lawyer friendly versions]] of Film/JamesBond, [[Franchise/{{Transformers}} Megatron]], Creator/StevenSeagal and Creator/ChuckNorris to defeat Nightmare's army.
120** ''ComicBook/{{Deadpool}} Killustrated'' is similar, except that the Merc With A Mouth is ''killing'' all the great characters of fiction, in the conviction that if he destroys the heroic archetypes of literature [[RageAgainstTheAuthor the Marvel Universe will never exist]].
121* Creator/DynamiteComics:
122** ''[[http://www.comicbookresources.com/?page=article&id=48357 Legenderry: A Steampunk Adventure]]'' is an {{Elseworld}} to various Dynamite universes, in which ComicBook/RedSonja, ComicBook/TheGreenHornet, [[ComicBook/TheLastPhantom The Phantom]], ComicBook/{{Vampirella}}, [[ComicBook/CaptainVictoryAndTheGalacticRangers Captain Victory]], Silver Star, Series/TheSixMillionDollarMan, Franchise/{{Zorro}} and [[ComicBook/FlashGordonZeitgeist Flash Gordon]] all exist in the same world. Which is {{Steampunk}}. The subsequent spin-offs add more crossovers: ''Legenderry: Green Hornet'' reveals the Legenderry world has an equivalent of the Literature/LandOfOz; ''Legenderry: Red Sonja'' has her team up with the Bride of Literature/{{Frankenstein}} and also features [[Literature/TwentyThousandLeaguesUnderTheSea Captain Nemo]]; and ''Legenderry: Vampirella'' has [[Literature/ThePrisonerOfZenda Rupert of Hentzau]] and [[Literature/TheIslandOfDoctorMoreau Dr Moreau]].
123** ''ComicBook/PathfinderWorldscape'' is another crossover brought by Dynamite Entertainment featuring ''TabletopGame/{{Pathfinder}}'' adventurers alongside Franchise/{{Tarzan}}, Literature/JohnCarterOfMars, ComicBook/RedSonja and [[PublicDomainCharacter Fantomah]], where they are plucked from their respective dimensions and forced to fight against each other and other creatures in the world of Worldscape.
124** ''Sword of Sorrow'' features a pandimensional AmazonBrigade comprising [[Literature/JohnCarterOfMars Dejah Thoris]], [[Radio/TheGreenHornet Mulan Kato]], [[Literature/SherlockHolmes Irene Adler]], Lady Franchise/{{Zorro}}, ComicBook/LadyRawhide, [[ComicBook/TheShadow Black Sparrow]], [[Franchise/{{Tarzan}} Jane Porter]], ComicBook/JenniferBlood, Jana the JungleGirl, Miss Fury, [[ComicBook/{{Vampirella}} Vampirella, Pantha]], [[ComicBook/ProjectSuperpowers Masquerade]], [[ComicBook/EvilErnie Purgutori, Chastity, MistressHel]], Bad Kitty, and, of course, ComicBook/RedSonja.
125** The 2013 crossover ''ComicBook/{{Masks}}'' features all the CoatHatMask-type characters: ComicBook/TheShadow, Radio/TheGreenHornet, Literature/TheSpider, a new Franchise/{{Zorro}} and so on.
126* ''The Totally Stonking, Surprisingly Educational and Utterly Mindboggling UsefulNotes/ComicRelief Comic'' (1991) featured (amongst others) the presenters of Comic Relief, ComicBook/JudgeDredd, ComicStrip/DanDare, [[ComicBook/TheDandy Desperate Dan]], ComicStrip/DennisTheMenaceUK, [[ComicBook/{{Viz}} Roger Melly]], ComicBook/{{Batman}}, ComicBook/{{Superman}}, ComicBook/WonderWoman, ComicBook/TheIncredibleHulk, ComicBook/SpiderMan, ComicBook/SilverSurfer, the Franchise/TeenageMutantNinjaTurtles, all seven (then) [[Series/DoctorWho Doctors]], Franchise/RoboCop, [[Series/SesameStreet Cookie Monster]], and Sir Edmund Series/{{Blackadder}}. Sadly but unsurprisingly, copyright issues mean it can never, ever be reprinted.
127* ''ComicBook/SonicTheHedgehogMegaManWorldsCollide'' is [[ExactlyWhatItSaysOnTheTin a crossover between]] ''ComicBook/{{Sonic The Hedgehog|ArchieComics}}'' and ''ComicBook/{{Mega Man|ArchieComics}}''. It was followed by a sequel, ''ComicBook/SonicTheHedgehogMegaManWorldsUnite'', which adds ''VideoGame/MegaManX'' and ''WesternAnimation/SonicBoom'' into the mix... and halfway through ''that'', [[SerialEscalation even more crossovers from Sega and Capcom's properties]] were added[[note]]i.e. ''VideoGame/AlexKidd'', ''VideoGame/SkiesOfArcadia'', ''VideoGame/NightsIntoDreams'', ''VideoGame/BillyHatcherAndTheGiantEgg'', ''VideoGame/PanzerDragoon'', and ''VideoGame/GoldenAxe'' for the Sega side; ''Franchise/StreetFighter'', ''VideoGame/GhostsNGoblins'', ''VideoGame/{{Okami}}'', ''VideoGame/MonsterHunter'', ''Franchise/BreathOfFire'' (specifically ''VideoGame/BreathOfFireIII''), and ''VideoGame/ViewtifulJoe'' for the Capcom side[[/note]]. And while characters original to Archie's ''Sonic'' and ''Mega Man'' comics did not appear in the first crossover, they do play roles in the second one, with Xander Payne from the ''Mega Man'' comic playing a crucial role.
128* ''ComicBook/DisneyMouseAndDuckComics'' had ''Donald Duck in "La Storia Infinita"'', where Donald and Mickey are tasked to save the entire Disney multiverse (meeting such various characters as Maleficent, Merlin, Kaa and Shere Khan, Chip'n'Dale...).
129* ''ComicBook/Revolution2016'' helps Creator/IDWPublishing kickstart the ComicBook/HasbroComicUniverse.
130* ''Vigilant'' is a team book from Rebellion that brings all the IPC/Fleetway superhero and superheroish characters together. The team is lead by Dr Sin (grandson of Dr Sin from ''ComicBook/TwoThousandAD'', and introduced in the previous year's one-shot ''Scream! and ComicBook/{{Misty}} Halloween Special'') and includes Steel Commando, the Leopard (of Lime Street), a new Thunderbolt the Avenger, Blake "Deathwish" Edmonds, Pete's Pocket Army, Death-Man and Yao (new characters introduced in the aforementioned special), and M.A.X. (from the ''Scream!'' strip ''The Thirteenth Floor''), trying to rescue Adam Eterno from a LegionOfDoom comprising IPC's {{Villain Protagonist}}s. The Esper Commandos (from ''Pow!'') and Crabbe's Crusaders (from ''ComicBook/{{Buster}}'') are also called in to help. In addition, a back-up strip sees Edmonds getting sent to the dystopian world of the ''ComicBook/{{Action}}'' strip "Kids Rule OK!"
131* ''Adler'', by Lavie Tidhar and Paul [=McCaffrey=], is a {{Steampunk}} adventure featuring major characters from the Literature/SherlockHolmes mythos, ''Literature/{{She}}'', ''Literature/JaneEyre'', ''Literature/{{Carmilla}}'', and ''ComicStrip/LittleOrphanAnnie'', and minor characters from many other 19th century works.
132* Parodied in ''Magazine/{{MAD}}'' Magazine's satire of ''Series/TheFactsOfLife'' ("The Yaks of Life"). The final panels depict "Beastland Academy's" Parents Day Picnic, where it's revealed that "Blah's" dad is [[Series/{{Dallas}} J.R. Ewing]], "Tootsie's" parents are [[Series/TheJeffersons George and Louise Jefferson]], "Moe's" father is [[Series/HillStreetBlues Det. Mick Belker]], and "Nutalie" is the daughter of [[Series/TheDukesOfHazzard Boss Hogg]]. When all these obnoxious characters start bickering amongst one another, the sheer madness of it is enough to cause "Mrs. Ferret" to have a nervous breakdown.
133* ''ComicBook/TheSimpsonsFuturamaCrossoverCrisis'': The final part of the second miniseries becomes this when every fictional character from every book ever written comes to life and causes chaos in New New York.
134** The list includes: Literature/AnneOfGreenGables, Literature/TomSawyer, Literature/{{Dracula}}, Literature/HarryPotter, Literature/TheCatInTheHat, Literature/TheThreeMusketeers and the ManInTheIronMask, [[Literature/MobyDick Captain Ahab]], Theatre/{{Hamlet}}, [[Literature/AlicesAdventuresInWonderland Alice, the Cheschire Cat, Tweedledee, and Tweedledum]], Literature/SherlockHolmes and Dr. Watson, Myth/RobinHood, Myth/PaulBunyan and Babe the Blue Ox, [[Literature/TheWonderfulWizardOfOz Dorothy, the Tin Man, and the Flying Monkeys]], Literature/TheInvisibleMan, [[Franchise/TolkiensLegendarium some Hobbits]], Creator/JohnGrisham lawyers, [[Literature/{{It}} Pennywise]], Literature/{{Carrie}}, Literature/{{Christine}}, [[Literature/TheShining Jack Torrance]], Literature/{{Cujo}}, [[Literature/ChildrenOfTheCorn Isaac]], [[Literature/OliverTwist the Artful Dodger and Mr. Bumble]], Literature/{{Tarzan}}, the creatures from ''Literature/HopOnPop'', [[Literature/TwentyThousandLeaguesUnderTheSea Captain Nemo]], [[Literature/LesMiserables Inspector Javert]], Literature/ConanTheBarbarian, [[Literature/TheStrangeCaseOfDrJekyllAndMrHyde Dr. Jekyll/Mr. Hyde]], [[Literature/FearAndLoathingInLasVegas Raoul Duke]], Literature/PeterPan, Literature/NancyDrew, Literature/PippiLongstocking, ComicBook/{{Superman}}, ComicBook/{{Batman}}, ComicBook/WonderWoman, ComicBook/SpiderMan, ComicBook/{{Wolverine}}, ComicBook/CaptainAmerica, ComicBook/TheMightyThor, Literature/LittleRedRidingHood and the Big Bad Wolf, Literature/{{Frankenstein}}'s monster, [[Literature/ToKillAMockingbird Atticus Finch]], and [[Literature/TheOutsiders Ponyboy Curtis]].
135[[/folder]]
136
137[[folder:Comic Strips]]
138* [[ComicStrip/Blondie1930 Blondie]] and Dagwood celebrated their 75th anniversary with a who's who of other comic book characters, far too many to list here.
139[[/folder]]
140
141[[folder:Films -- Animation]]
142* ''Film/WhoFramedRogerRabbit'' crossed over Disney characters with characters from Warner Bros. and other studios, saying that they all co-existed with humans [[AnimatedActors as actors in Hollywood]], and that they all hail from "{{Toon}}town", which seemed to be half UsefulNotes/LosAngeles and half AlternateUniverse.
143* ''Franchise/ToyStory'' features many toys from rival companies as major or minor characters including Mr. Potato Head, Barbie, and LEGO among many others. (And probably some [[{{Expy}} expies]] too.)
144** Also Totoro. Because why not?
145* The ''Franchise/{{Shrek}}'' films do this to fairy tale characters.
146* ''WesternAnimation/WreckItRalph'' does this with arcade video game characters.
147** In ''WesternAnimation/RalphBreaksTheInternet'', Vanellope is sent to the website Oh My Disney, where she meets all the Franchise/{{Disney Princess}}es (and inspires them to wear comfortable clothes). The site is also populated with characters from subsidiaries Creator/{{Pixar}}, Creator/{{Lucasfilm}} and Creator/MarvelStudios.
148* ''WesternAnimation/TheLEGOMovie'' features ComicBook/{{Batman}}, ComicBook/{{Superman}}, ComicBook/WonderWoman, ComicBook/GreenLantern, ComicBook/TheFlash, [[Film/TheLordOfTheRings Gandalf]], [[Film/HarryPotter Dumbledore]], [[WesternAnimation/TheSimpsons Milhouse]], Anime/SpeedRacer, the Franchise/TeenageMutantNinjaTurtles, [[Franchise/StarWars Han Solo, Chewbacca, C-3P0, Lando]]... and that's not including characters from LEGO's own themes!
149* ''WesternAnimation/FoodFight'' did this to advertising mascots (called "Ikes" in the film - the characters' slang for icons).
150* ''The Search For Mickey Mouse'' was a [[WhatCouldHaveBeen scrapped]] Creator/{{Disney}} film from the early 2000s meant to coincide with WesternAnimation/MickeyMouse's 75th anniversary. In it Mickey gets kidnapped. WesternAnimation/{{Goofy}}, WesternAnimation/DonaldDuck, and Basil from ''WesternAnimation/TheGreatMouseDetective'' go around the world looking for him and encountering numerous Franchise/DisneyAnimatedCanon characters. The film was inspired by cut scenes from ''Film/WhoFramedRogerRabbit'' and ''WesternAnimation/{{Fantasia 2000}}''. Rumors existed that the film was coming out as late as 2012. The film however was cancelled all the way in 2002. The team couldn't figure out how to make an engaging film with a decent plot that also involved Disney cameos every few scenes. A more successful crossover involving Disney IP's would eventually materialize in the form of the Oh My Disney sequence in ''Ralph Breaks the Internet'' (see above).
151* Creator/DingoPictures' ''Animal Soccer World'' includes animal characters from most of their Disney {{Mockbuster}} movies.
152* At the very end of ''WesternAnimation/TheLionKingOneAndAHalf'', various Disney characters enter to rewatch the movie.
153[[/folder]]
154
155[[folder:Films -- Live-Action]]
156* ''Film/WhoFramedRogerRabbit'' crossed over Disney characters with characters from Warner Bros. and other studios, saying that they all co-existed with humans [[AnimatedActors as actors in Hollywood]], and that they all hail from "{{Toon}}town", which seemed to be half UsefulNotes/LosAngeles and half AlternateUniverse. That said, the actual plot mostly revolves around characters specific to the movie (and [[Literature/WhoCensoredRogerRabbit the book on which it was loosely based]]), with the pre-existing characters mostly being cameos.
157* ''Film/ChipNDaleRescueRangers2022'' takes place in a world similar to ''Roger Rabbit'', even including the bunny himself in a scene. Only with downright every property under the sun, animated or live-action (such as a brief scene showing the movie ''Franchise/{{Batman}} vs. ''[[Film/ETTheExtraterrestrial E.T.]]''), and even [[DemographicDissonantCrossover family-unfriendly]].
158* [[http://video.yahoo.com/watch/411762/2393937 The Area 52 scene]] in ''Film/LooneyTunesBackInAction'' involved the heroes facing off against Marvin the Martian, who led a group of sci-fi aliens which included [[Literature/TheDayOfTheTriffids a Triffid plant]], the eponymous ''Film/RobotMonster'', the mutant from ''Film/ThisIslandEarth'' and even ''freaking [[Series/DoctorWho Daleks]]!''
159* Many Creator/SeltzerAndFriedberg works, such as ''Epic Movie'' and ''Disaster Movie'', could be considered {{Massive Multiplayer Crossover}}s, insofar as they feature many characters and plot elements (or [[ShallowParody weak parodies]] thereof) from recent movies and mash them all together.
160%%* Done with toys in ''Film/TheIndianInTheCupboard''.
161* ''Film/MegaMonsterBattleUltraGalaxyLegends'' fuses many Ultra kaiju from many different series into one movie.
162* ''Franchise/ToyStory'' features many toys from rival companies as major or minor characters including Mr. Potato Head, Barbie, and LEGO among many others. (And probably some [[{{Expy}} expies]] too.)
163* Franchise/MarvelCinematicUniverse:
164** ''Film/{{The Avengers|2012}}'' served as the first major one of these, which prior to then were only connected via references or brief cameos. It brings in characters from ''Film/IronMan1'', ''Film/{{The Incredible Hulk|2008}}'', ''Film/IronMan2'', ''Film/{{Thor}}'', and ''Film/{{Captain America|TheFirstAvenger}}''. Since then, pretty much every MCU series has been a crossover in some way.
165** ''Film/AvengersInfinityWar'' features not just the Avengers, but pretty much all superheroes from Marvel Cinematic Universe film series, including the Guardians of the Galaxy, Doctor Strange and Wong, Black Panther and other Wakandans, Asgardians, and Spider-Man.
166** ''Film/SpiderManNoWayHome'' is the first ''multiversal'' crossover for the franchise, bringing over villains from the Sam Raimi Film/SpiderManTrilogy and ''Film/TheAmazingSpiderMan'' movies as well as [[spoiler:both of their respective Spider-men]]. Also, [[spoiler:[[Film/Venom2018 Eddie Brock]] appears in TheStinger]]. On a different note, [[Series/Daredevil2015 Matt Murdock]] makes a cameo, being the first outright crossover from the Netflix MCU series [[spoiler:alongside Kingpin appearing in ''Series/{{Hawkeye|2021}}'' around the same time]].
167* ''[[Film/ZackSnydersJusticeLeague Justice League]]'' is the closest the Franchise/DCExtendedUniverse has come to this.
168* In 1959 a movie was released called ''Film/AliasJessieJames'' starring Creator/BobHope, who was a big fan of TV westerns; he used his clout to include characters from nine different shows in what would turn out to be the first of three Western massive multiplayer crossovers. People appeared in that movie from ''Franchise/TheLoneRanger'', ''Series/TheGeneAutryShow'', ''AnnieOakley'', ''UsefulNotes/DavyCrockett'', ''TheLifeAndLegendOfWyattEarp'', ''Series/{{Gunsmoke}}'', ''Series/WagonTrain'', ''[[Creator/RoyRogers The Roy Rogers Show]]'' and ''Series/{{Maverick}}''.
169* In the 40th Anniversary ''OOO, Den-O, All Riders: Let's Go Franchise/KamenRider'' has all of the main riders from [[Series/KamenRider Kamen Rider #1]] to ''Series/KamenRiderOOO''.
170* ''Film/SpaceJamANewLegacy'' one-ups [[Film/SpaceJam the original]] by not only featuring the Westernanimation/LooneyTunes, but just about every major film and TV franchise from Creator/WarnerBros. in a "Serververse" where every IP has its own planet.
171[[/folder]]
172
173[[folder:Myths and Religion]]
174* The ''Argonautica'' (more commonly known by the adaptation ''Film/JasonAndTheArgonauts'') by Apollonius of Rhodes (3rd century BCE) is one of the very first Massive Multiplayer Crossovers, arranged in what would become a fairly classic method -- basically throwing one or two dozen heroes from various separate Greek myth cycles together on a boat with a common mission. This of course makes the Massive Multiplayer Crossover OlderThanFeudalism.
175* Many of the same characters also appear in the story of the Kalydonian Boar Hunt -- which, DependingOnTheAuthor, may occur before or after ''The Argonautica''.
176* According to some religious studies texts, this has also gone on in many, ''many'' other myths: the most notable involve various saints meeting each other. This goes on even today.
177* Myth/ArthurianLegend incorporates characters from various mythical cycles, which has also made it something of an AnachronismStew. Gawain, Tristan, and Merlin, nowadays permanent fixtures in the mythos, were originally folk heroes in their own right, and for centuries, writers have added new characters relevant to their own contemporary times or CreatorProvincialism (Lancelot from the French, for instance).
178[[/folder]]
179
180[[folder:Pro Wrestling]]
181* During the 1990s, ''Weekly Pro Wrestling'' in the Tokyo Dome would feature "Offer Matches", pro wrestling, shoot fighting ''and'' mixed martial arts from Wrestling/{{All Japan|WomensProWrestling}}, the other Wrestling/{{All Japan|ProWrestling}}, Wrestling/{{FMW}}, IWA Japan, JWP, LLPW, Wrestling/{{Michinoku|ProWrestling}}, Wrestling/{{New Japan|ProWrestling}}, Pancrase, {{Wrestling/U|niversalWrestlingFederation}}WF, RINGS as well as finding time for two other indie promotions in addition to these(such as PWFG and Go Gundan) on the same card(they even had some bouts with "UFC rules"). It didn't last, getting all those promoters together is hard, but these were very successful as far as filling the building with fans went.
182* Wrestling/DramaticDreamTeam (basically a parody of American wrestling), Wrestling/ProWrestlingNOAH (American style matches only with a more realistic take and a more formal presentation), Wrestling/ProWrestlingZero1 (even more emphasis on technical matches than NOAH but have tendencies toward exaggerated gimmicks and bizarre angles), Wrestling/MichinokuProWrestling (largely based on Mexican Lucha Libre though there are some "Japanese strong style" staples) and IWA Japan (features "[[GarbageWrestler hardcore]]" wrestlers and has strong Puerto Rican influences) all got together to do a Differ Cup, which was as odd and entertaining as that many collaborating together sounds could be.
183* In its early years, Wrestling/RingOfHonor was involved in a three way cross promotional rivalry between itself, IWA Mid-South and Wrestling/{{N|ationalWrestlingAlliance}}WA Wildside. ''DO OR DIE II'' had the additions of NWA Midwest, NWA Florida, PCW, So Cal Pro and Wrestling/ProWrestlingGuerilla.
184* Sumie Sakai's ''We Love Wrestling/{{Sabu}}'' benefit show on April 17, 2005 at the Tokyo Differ Ariake had former Wrestling/{{FMW}} wrestlers Wrestling/MasatoTanaka, Mr. Gannosuke, Megumi Kudo, Kintaro Kanemura, Tetsuhiro Kuroda, Mammoth Sasaki, GOEMON, Onryo, Hido, Shark Tsuchiya, Hisakatsu Oya, Ricky Fuji, Miss Mongol, Gosaku Goshogawara, Kaori Nakayama and Hayabusa to represent the then dormant promotion, Ryuji Ito, Necro Butcher and Daisuke Sekimoto from Big Japan, Crazy SKB and Shinobu from 666, The Apache Army's Akrangers Takashi Sasaki & GENTARO, Asian Cougar, Asian Condor, Asian Monkey, Lingerie Muto, GAMI, Fang Suzuki, Seiji Ikeda, Eddie Edwards and [[Wrestling/JimFullington The Sandman]].
185* In 2007, Alex Shane and Doug Williams called sixteen promotions to Liverpool England for a "King Of Europe Cup". Jody Fleisch represented [=1PW=], Wrestling/ClaudioCastagnoli represented Wrestling/{{Chikara}}, Wrestling/ChrisHero represented Wrestling/{{CZW}}, Ryo Saito represented Wrestling/DragonGate, Wrestling/ElGenerico represented the International Wrestling Syndicate, Wrestling/MattSydal represented IWA Mid-South, Wrestling/{{PAC}} represented IPW:UK, Davey Richards represented Wrestling/ProWrestlingGuerilla, Go Shiozaki represented Wrestling/ProWrestlingNOAH, Trent Acid represented Pro Wrestling Unplugged, Martin Stone represented Real Quality Wrestling, Wrestling/NigelMcGuinness represented Wrestling/RingOfHonor, Wrestling/{{Rh|yno}}ino represented [[Wrestling/ImpactWrestling TNA]], Ares represented westside Xtreme wrestling, Zebra Kid represented World Association of Wrestling and Williams himself represented Premier Promotions. In addition, there were two "Taste Of IPW:UK" pre shows.
186* Vendetta Pro started hosting ''Casino Royale'' crossovers in conjunction with the Cauliflower Alley Club in 2011, which also saw the involvement of Adrenaline Unleashed Wrestling. 2014 saw collaboration between Dropkick Depression, Gold Rush Pro Wrestling, the Wrestling/{{N|ational Wrestling Alliance}}WA, All Pro Wrestling and [=ChickFight=] for a two night ''Casino Royal'' event.
187* Sendai Girls Pro Wrestling hosted the ''Dantai Taikou Flash Tournament'' in November 2011. Teams from JWP, Diana, REINA, WAVE, Ice Ribbon and Wonder Ring STARDOM entered it.
188* The World Wrestling League has been on a mission to facilitate them since 2012. In Bolivia, it pitted wrestlers from multiple associates such as Dominican Wrestling Entertainment and Peru's Leader Wrestling Association against locals from La Paz based New Xtreme Order at the ''Campeones Del Ring: Hacedores de Proezas'' event on June 25th, 2013. It even got representation from a non associate, Ring Warriors.
189* nCw Femme Fatales XI boasted a "Triple Main Event" featuring championships of three different women's promotions from three different countries all on the line. The Bellatrix World Title(UK), Wrestling/{{SHIMMER}} Title(USA) and nCw FF International Title(Canada).
190* At ''Wrestling/{{CHIKARA}} [=JoshiMania=]'', women from JWP, Pro Wrestling WAVE, Osaka Joshi, Union Pro Wrestling and Oz Academy were all featured.
191* Argentina in the 90's had a ''Franchise/{{Rambo}}''-themed wrestling show entitled ''[[http://wrestlecrap.com/inductions/active-inductions/rambo-y-sus-titanes Rambo y sus Titanes]]'', which featured matches between ''Rambo'' characters. The show was actually a SpinOff of the action figures for ''WesternAnimation/RamboTheForceOfFreedom'' (which were [[GermansLoveDavidHasselhoff extremely popular]] in South America), and produced by Jocsa -- the manufacturer of said toys. The wrestlers' costumes were modeled upon the toys, even going as far as giving Rambo a mask to give his face a more toy-like physique. Sometimes, it also turned into a ProductPromotionParade for other toylines produced by Jocsa by featuring non-''Rambo'' characters (such as ''Film/PoliceAcademy'').
192[[/folder]]
193
194[[folder:Radio]]
195* Creator/TheBBC Radio 4 series ''The Rivals'' is a series of adaptations of various Victorian detective stories by people who weren't Creator/ArthurConanDoyle, based on the short story collections ''The Rivals of Literature/SherlockHolmes'' edited by Hugh Green. What makes the radio series a Massive Multiplayer Crossover rather than a sequence of unrelated dramas is that Inspector Lestrade is [[CanonForeigner added]] to every story as TheWatson, placing them all in the same [[TheVerse Verse]].
196[[/folder]]
197
198[[folder:Roleplay]]
199* ''Roleplay/OnceUponAMultiverse'' is based on this concept, doing for fiction what ''Series/OnceUponATime'' did for fairy tales. The main cast ''alone'' pulls from ''ComicBook/FirestormDCComics'', ''Webcomic/MobPsycho100'', ''Anime/KillLaKill'', ''VideoGame/FireEmblemGenealogyOfTheHolyWar'', ''WesternAnimation/SuperFriends'', ''VideoGame/HalfLife'', ''VideoGame/{{Undertale}}'', ''Manga/TheOnesWithin'', ''VideoGame/{{Mafia}}'', ''VideoGame/SpidermanPS4'', ''Anime/DragonBallZ'', ''WesternAnimation/StevenUniverse'', and ''TabletopGame/MagicTheGathering''.That's not even getting into the supporting cast.
200* ''Roleplay/TheMassiveMultiFandomRPG'', TV Tropes' own MassiveMultiplayerCrossover-type PlayByPostGame. The premise: a mysterious, all-powerful being known only as The Troper has ripped dozens of characters out of their universes and dumped them into an enclosed city with no way out. Each new day the city's inhabitants are subjected to a new, often absurd, scenario called a "curse"--[[GenderBender having their genders reversed]], [[ForcedTransformation being transformed into animals]] or being transported into a [[{{Prehistoria}} dinosaur-infested jungle]]. The game included characters from ''Franchise/{{Pokemon}}, Manga/FullmetalAlchemist, VideoGame/GhostRecon, VideoGame/ValkyriaChronicles, ComicBook/XMen, Franchise/MassEffect, Series/{{Lost}}, Franchise/StarTrek, WesternAnimation/DannyPhantom, Franchise/{{Halo}}, Anime/TengenToppaGurrenLagann, VideoGame/MetalGearSolid, VideoGame/NoMoreHeroes, Franchise/StarWars,'' and ''Franchise/KingdomHearts'' among many, many, many others. Season 2 began almost as soon as Season 1 ended, and featured characters from ''Manga/SoulEater, VideoGame/MegaManX, Series/{{Firefly}}, Franchise/LyricalNanoha, Manga/{{Yotsuba}}, ComicBook/GreenLantern, Anime/NeonGenesisEvangelion, Franchise/{{Castlevania}}'' and more. Season 3 introduced characters from ''Franchise/{{Disgaea}}'', ''Franchise/{{Metroid}}'', ''VideoGame/Persona3'', ''Manga/HayateTheCombatButler'', ''VideoGame/GodHand'', ''Literature/{{Slayers}}'' and more.
201* TV Tropes's resident ''Roleplay/HungerGamesSimulation'' thread has featured ''countless'' characters from hundreds of different media (from the mainstream to the ridiculously obscure) since its debut in 2016. The roleplay threads tying into it (both the original thread ''Convergence'' and its reboot ''Another Side, Another Story'') that show the adventures of the nominators and their friends in Panem, along with often featuring the characters who get nominated in the main HGS thread as [[DropInCharacter drop-in characters]], has a regular and recurring cast that has featured characters from the likes of ''Franchise/TheLegendOfZelda'', ''VideoGame/{{Undertale}}'', ''Literature/TheMagicSchoolBus'', ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', ''WesternAnimation/IceAge'', ''WesternAnimation/BigCityGreens'', ''WesternAnimation/StevenUniverse'', ''WesternAnimation/LooneyTunes'', ''VideoGame/EarthBound1994'', ''Franchise/UltraSeries'', ''Franchise/{{Kirby}}'' and more.
202* The number of franchises characters come from in ''Roleplay/CampusLife'' is absurd. In a short list there's ''VideoGame/EarthBound1994, Franchise/SonicTheHedgehog, Franchise/{{Pokemon}}, [[VideoGame/SoulSeries Soul Calibur]], WesternAnimation/MyLittlePonyFriendshipIsMagic, Franchise/StarWars, VideoGame/{{Pikmin}}, VideoGame/{{Klonoa}}, VideoGame/BlazBlue, VideoGame/{{Portal}}, Franchise/{{Stargate|Verse}}, Franchise/DragonBall, ComicBook/IronMan'', and many, ''MANY'' others.
203* The Roleplay/FictionalISOTMapGame series of Website/AlternateHistoryDotCom takes its premise as being about 2-dozen or so nations from different works of fiction suddenly being transported to a "blank" Earth without sentient life.
204* Although there are [[JournalRoleplay many similarly-themed RPs]], ''Roleplay/MilliwaysBar'' deserves mention just for its ''size''. The basic premise is that any character from any fandom can find themselves at the titular bar... and sometimes it seems like just about everyone has.
205* ''Roleplay/DestroyTheGodmodder'', as a result of the flexible summoning system, can crossover with literally 'anything' as a result of player actions, with the GM often expanding on that crossover. There's a reason why it's often referred to as "the biggest CrackFic ever written." It's {{Justified}} due to the games taking place in an [[TheWorldAsMyth infinite multiverse containing every fictional universe ever created.]]
206** An example of how crazy the crossovers in Destroy the Godmodder can get is the Arrival - a story event at the end of Act 3 that featured [[AIIsACrapshoot Project Binary]], [[WesternAnimation/GravityFalls Bill Cipher]], [[VideoGame/{{Portal}} GLaDOS]], and King Ikea, a 'sapient table', teaming up to invade [[VideoGame/{{Minecraft}} Minecraftia]]. This was following the Webcomic/{{Homestuck}} invasion in the previous Act.
207** As of ''DTG 2'': [[{{VideoGame/Minecraft}} Minecraftia]], the setting of the game, is threatened by [[BigBad the Godmodder]], a mysterious employer who convinced [[{{Webcomic/Homestuck}} Doc Scratch, Lord English, and the Condescence]] to invade it, and team of [[WellIntentionedExtremists Well Intentioned Extremists]] known as the counter-operation that was set up my the U.S Government and is made up of an [[AIIsACrapshoot AI called Project Binary]], [[{{VideoGame/Portal}} GLaDOS]], and [[{{WesternAnimation/GravityFalls}} Bill Cipher]].
208** The heroes consist of the insane king of the Nether accompanied by [[{{VideoGame/TheLegendOfZeldaTwilightPrincess}} Midna, who wields the Twili version of the Master Sword]], an [[OurElvesAreDifferent elven mage]] who happens to be an alien from a [[{{Webcomic/Homestuck}} Sburb session]], a warrior-engineer from the [[{{TabletopGame/Warhammer40000}} Warhammer 40K universe]], another elf, this time an engineer who is companions with [[{{WesternAnimation/Futurama}} an iconic drunken robot]] and owns a space station populated by a small army of [[{{VideoGame/KerbalSpaceProgram}} kerbal]] researchers and run by [[{{Film/TwoThousandOneASpaceOdyssey}} HAL 9000]].
209* The premise of ''Roleplay/TrespassersOfTheMultiverseGaiden'' is characters coming from different worlds to make a LastStand against a HordeOfAncientLocusts.
210* The forum roleplay ''Roleplay/CityOfLostCharacters'' (a SpiritualSuccessor of sorts to the ''Massive Multi-Fandom RPG'', above), where characters from all over the multiverse are trapped inside an ever-shifting city and subject to a series of challenges. The first few player characters included arrivals from ''WesternAnimation/BenTen'', ''Franchise/MassEffect'', ''VideoGame/LeagueOfLegends'', ''WesternAnimation/RickAndMorty'', ''WesternAnimation/DannyPhantom'', ''VideoGame/{{Undertale}}'' and ''VideoGame/NoMoreHeroes''. In total, the roleplay featured player characters from more than a hundred different franchises.
211** Its sequel, ''New Game+'', is just as much this as its predecessor. The first few arrivals included characters from ''VideoGame/Persona5'', ''WesternAnimation/RiseOfTheTeenageMutantNinjaTurtles'', ''VideoGame/{{Shantae}}'', ''Anime/PantyAndStocking'', ''VideoGame/ResidentEvil'', ''Webcomic/MountainTime'', ''Literature/TheGreatGatsby'', and many more.
212* ''Roleplay/SuperMagicWarsV'': Done in the style of ''VideoGame/SuperRobotWars'', as in the name and as said above. The plots are all taking place in a single cohesive world rather than a mashup crossover of unknown elements meeting each other. The unknowns make better contact through the main characters themselves rather than through the universe as a whole, with each member of the cast learning something new about what's going on.
213* ''Roleplay/TVTropesRollToDodge'': So far we've seen elements of ''Franchise/TouhouProject'', TabletopGame/MaidRPG, VideoGame/MetroidPrime, Franchise/SilentHill, VideoGame/DwarfFortress, and a player has teleported to the ''Franchise/MassEffect'' universe. Due to major controversy regarding the place where ''Franchise/TouhouProject'' takes place, Gensokyo had been closed off temporarily.
214* ''Roleplay/UpUpAndAway'' is the SpiritualSuccessor to ''Roleplay/JusticeAvengers'', and has only one rule when it comes to characters: so long as they can be fit into a {{Superhero}} setting, anything goes. The first fight of the RP saw characters from ''VideoGame/{{Borderlands}}'', ''Franchise/{{Transformers}}'', ''Manga/{{Naruto}}'', ''Literature/CaptainUnderpants'', ''Franchise/TeenageMutantNinjaTurtles'', ''WesternAnimation/ThePowerpuffGirls'', and ''ComicBook/SonicTheHedgehogArchieComics'' teaming up to fight a giant robot monkey sent by [[VideoGame/CityOfHeroes Lord Recluse]], and it only gets crazier from there.
215[[/folder]]
216
217[[folder:Sports]]
218* Vehicular motorsports, especially auto racing, motorcycle racing and rallying, are the RealLife examples of this trope. When you have car/bike manufacturers bring their works teams into the racing series, which are also joined by privateer teams in different locales respectively. UsefulNotes/FormulaOne, UsefulNotes/WorldRallyChampionship, [=MotoGP=], UsefulNotes/{{NASCAR}}, UsefulNotes/FormulaE, [=Isle of Man TT=], [=Dakar Rally=] and UsefulNotes/TwentyFourHoursOfLeMans are some of the famous examples.
219[[/folder]]
220
221[[folder:Tabletop Games]]
222* ''[[http://edenstudiosdiscussionboards.yuku.com/topic/4219/t/Heroes-and-Monsters-of-the-Millenium-1995-2005.html?page=1 Heroes and Monsters of the Millennium]]'' is a conversion for the MediaNotes/{{Unisystem}} RPG ruleset, mixing ''Series/BuffyTheVampireSlayer''[=/=]''Series/{{Angel}}'' with everything from ''[[Creator/MarvelComics Marvel]]'' and ''Creator/DCComics'' to ''Series/StargateSG1'', ''Franchise/{{Godzilla}}'', ''Series/{{Ultraman}}'', ''Franchise/LyricalNanoha'', ''WesternAnimation/{{Gargoyles}}'', ''Manga/NegimaMagisterNegiMagi'', the works of Creator/HPLovecraft, ''Anime/MazingerZ'' and many others. With considerable overlap in themes, races, and technology.
223* ''Chaos TCG'', ''Sieg Krone'' and ''Weiss Schwarz TCG'' feature characters from several anime series.
224* The ''TabletopGame/{{Spelljammer}}'' and ''TabletopGame/{{Planescape}}'' settings were designed with this in mind. Spelljammer in particular has rule books dedicated to detailing the Crystal Spheres of settings such as [[Literature/{{Dragonlance}} Krynn]], [[TabletopGame/ForgottenRealms Abeir-Toril]], and [[TabletopGame/{{Greyhawk}} Oerth]]. Where as Planescape has portals to every type of world imaginable.
225* {{Collectible Card Game}}s that operate off of a UniversalSystem allow for this; the Universal Fighting System lets you pit [[Franchise/StreetFighter Chun-Li]] against [[VideoGame/SoulSeries Nightmare]], the VS System crosses over Creator/MarvelComics and Creator/DCComics, and the Crusade System lets you pair [[Anime/CowboyBebop Spike Spiegel]], [[Manga/FullmetalAlchemist Edward Elric]], and Anime/CuteyHoney with HumongousMecha from ''[[Anime/SuperDimensionFortressMacross Macross]]'', ''VideoGame/SuperRobotWarsOriginalGeneration'', and countless others.
226* Similarly, the ''TabletopGame/HeroClix'' tactical miniature combat game works on a PointBuildSystem basis and includes characters from many comic books (Marvel and DC, but also "indie" ones); Superman, Dhalsim and Dark Phoenix against Dr. Manhattan, Beta Ray Bill and someone else to match character points is a perfectly reasonable battle.
227* Creator/{{Hasbro}}'s short lived ''Attacktix'' line advertised itself based on the crossover possibilities of both ''Franchise/StarWars'' and ''Franchise/{{Transformers}}'', with promotional materials pitting the ''Anime/TransformersCybertron'' versions of Optimus Prime and Megatron against Darth Vader and Luke Skywalker. The ''Franchise/MarvelUniverse'' would eventually be added in towards the end of the line's run.
228* ''TabletopGame/AniMayhem'', a CollectibleCardGame produced in the middle 1990s by [[Creator/{{Geneon}} Pioneer Entertainment]] that set characters from many different anime settings -- surprisingly including many series licensed by companies ''other'' than Pioneer -- in a grand romp across their various worlds.
229* While ''TabletopGame/CityOfMist'' has a more [[AllMythsAreTrue folkloric slant]], the only true rule when it comes to Mythoi is that they're fictional characters. Aside from that, anything goes, so technically you could have the Rifts of [[Franchise/SuperMarioBros Mario]], [[Manga/JojosBizarreAdventure Joseph Joestar]], and [[WesternAnimation/StarVsTheForcesOfEvil Star Butterfly]] investigate the murder of [[Franchise/TheLegendOfZelda Princess Zelda]].
230[[/folder]]
231
232[[folder:Theatre]]
233* The works of Creator/DrSeuss were combined into a Broadway musical called ''Theatre/{{Seussical}}'', which mainly takes its story from ''Literature/HortonHearsAWho'', ''Horton Hatches the Egg'', and ''The One Feather Tail of Miss Gertrude [=McFuzz=]'', but contains elements and characters from ''I Had Trouble in Getting to Solla Sollew'', ''The Butter Battle Book'', ''Literature/HowTheGrinchStoleChristmas'', and more. And of course, they have Literature/TheCatInTheHat to move the plot around.
234** Jim Henson's ''The Wubbulous World of Dr Seuss'' did something similar, with Yertle the Turtle as a recurring villain.
235* ''Theatre/IntoTheWoods'', a multiplayer crossover borrowing from some Grimms' fairy tales.
236* The Tony Awards, especially more contemporary ceremonies, often will lean into the territory of this trope with the cast of nominated shows (as well as anything currently running) appearing in skits and the opening number, or at least a group of reference to Broadway classics. However, the 67th Tony Awards does something interesting: the opening production number, a dedication to taking it up to eleven called "Bigger", began with host Creator/NeilPatrickHarris performing among the Broadway casts of ''[[https://en.wikipedia.org/wiki/Once_(musical) Once]]''. As the performance goes on, he ends up dancing with the casts of ''[[https://en.wikipedia.org/wiki/Kinky_Boots_(musical) Kinky Boots]]'', ''[[https://en.wikipedia.org/wiki/Motown:_The_Musical Motown]]'', the [[CircusEpisode circusey]] ''Theatre/{{Pippin}}'' revival, ''Theatre/BringItOn'', ''Theatre/{{Matilda}}'', ''[[https://en.wikipedia.org/wiki/A_Christmas_Story:_The_Musical A Christmas Story]]'', the ''Theatre/{{Annie}}'' revival, ''[[Theatre/CinderellaRodgersAndHammerstein Rodgers and Hammerstein's Cinderella]]'' and Creator/MikeTyson (apparently he had a one-man show), climaxing with the casts of currently-running Broadway shows running up and down the aisles.
237** On top of that, the casts of then-running shows introduced the performances of the night in-character. Among the more surreal ones were [[Theatre/SpiderManTurnOffTheDark a chorus of Spider-Men]] introducing the revival of ''Annie'', the ''Theatre/RockOfAges'' cast introducing ''Cinderella'' and [[Theatre/TheLionKing Mufasa and Simba]] introducing the Pippin revival.
238** Bonus points for the music for the broadcast, consisting of a pre-''Hamilton'' Creator/LinManuelMiranda and[[Theatre/NextToNormal Tom Kitt]], who wrote "Bigger", [[Literature/TheWildParty Michael John LaChiusa]], who wrote lyrics to a parody medley for Creator/AndrewRannells, [[https://en.wikipedia.org/wiki/Megan_Hilty Megan Hilty]], and Creator/LauraBenanti, Music/CindiLauper (who wrote the music for ''Kinky Boots'') singing the "In Memoriam", and Music/AudraMcDonald, who closed out the show with Miranda.
239* Any revue based around a composer's work is going to be one of sorts. ''Prince of Broadway'' is notable for (a) being a revue dedicated to a Broadway ''director'', Hal Prince, and (b) recreating scenes from some of his most famous productions. The end result is a set list made up of excerpts from ''[[Theatre/SweeneyToddTheDemonBarberOfFleetStreet Sweeney Todd]]'', ''[[Theatre/ThePhantomOfTheOpera Phantom of the Opera]]'', ''Theatre/{{Cabaret}}'', and ComicBook/{{Superman}}.
240
241[[/folder]]
242
243[[folder:Theme Parks]]
244* Several examples in the Ride/DisneyThemeParks. The biggest example is ''Theatre/{{Fantasmic}}'', where a LegionOfDoom of Disney Villains [[BattleInTheCenterOfTheMind invade Mickey's mind]].
245* At Ride/UniversalStudios:
246** ''Ride/TheFuntasticWorldOfHannaBarbera'' was about Yogi Bear chasing after Dick Dastardly through the worlds of ''WesternAnimation/TheFlintstones'', ''WesternAnimation/ScoobyDoo'', and ''WesternAnimation/TheJetsons''.
247** ''Ride/JimmyNeutronsNicktoonBlast'' was this between almost every [[Franchise/{{Nicktoons}} Nicktoon]] made up until 2003.
248[[/folder]]
249
250[[folder:Toys]]
251* Bound to happen in toy model cars when many series include a mix of different brands from different makers. Franchise/HotWheels do this often due to licensing from real-world carmakers.
252* There exists a bootleg set of action figures dubbed [[http://knowyourmeme.com/photos/530109-bootleg-knock-off The Sense of Right Alliance]] that consists of a [[Franchise/{{Cars}} Lightning McQueen recolor]], the [[Franchise/PowerRangers Blue Ranger]], ComicBook/{{Superman}}, ComicBook/{{Batman}}, ComicBook/SpiderMan, and Franchise/{{Shrek}}, which also has [[WesternAnimation/TheIncredibles Mr. Incredible]], the Red Ranger, ComicBook/{{Venom}}, and the Franchise/TeenageMutantNinjaTurtles depicted on the packaging. It's become a minor Internet sensation, [[https://youtu.be/iXh5ay0mtLc spawning]] [[https://youtu.be/IVorWhPsY5I several]] [[https://youtu.be/1c5_atfRZlU fake]] trailers and at least [[https://youtu.be/EGshgRBECk0 one]] short film.
253[[/folder]]
254
255[[folder:Web Animation]]
256* The {{Machinima}} ''Beans''. Firstly, it crosses over characters from three different series and is made by three different machinima directors, then the storyline involves various internet memes... Oh. And it's made on ''VideoGame/SuperSmashBros''. Making it a crossover on a crossover.
257** Technically, any community-made Machinima will have this in spades. [[WebAnimation/DukeNukemForeverQuest Want to see Duke Nukem appear together with some Daleks?]] It's been done.
258* ''WebAnimation/TheFrolloShow'', made by [[Creator/{{chincherrinas}} the same creator]] of ''WebAnimation/SmashBrosLawl'', is also this, with characters from various media such as [[WesternAnimation/TheHunchbackOfNotreDameDisney Frollo]], [[WesternAnimation/BeautyAndTheBeast Gaston]], [[Anime/PantyAndStockingWithGarterbelt Panty and Stocking]], and other cartoon, anime, film, and video game characters (see [[Characters/TheFrolloShow here]] for more). Unlike most examples, it eventually starts developing an interesting plot and deeper interactions between all the characters.
259* ''WebAnimation/GamingAllStars'': A Garry's Mod series consisting of dozens of video game franchises. It's so ambitious it gives VideoGame/SuperSmashBros a run for its money; to name just a few of the franchises involved, there's Franchise/SuperMarioBros, Franchise/SonicTheHedgehog, VideoGame/{{Prototype}}, VideoGame/CrashBandicoot, Franchise/SpyroTheDragon, Franchise/MortalKombat, VideoGame/{{Rayman}}, VideoGame/RedDeadRedemption, VideoGame/TeamFortress2, VideoGame/{{Tekken}}, and the list goes on. If that doesn't sound crazy enough, it has a SequelSeries (''Gaming All Stars 2'') that brings the number of franchises involved up to eleven.
260* Two words: ''WebAnimation/GoryToons''. This ''WebAnimation/HappyTreeFriends''-inspired cartoon features an abundance of characters. These generally include but not limited to: ''WesternAnimation/SpongeBobSquarePants'', ''WebAnimation/HappyTreeFriends'', ''VideoGame/{{Kirby}}'', ''WesternAnimation/SouthPark'', ''WesternAnimation/TomAndJerry'', ''Franchise/SuperMarioBros'', ''Franchise/SonicTheHedgehog'', ''WebVideo/SuperMarioLogan'', and more!
261* [[https://www.youtube.com/watch?v=0HF4NgVkpjE&t=1138s "Multiverse"]] An hour long fan edit of ''Film/AvengersEndgame'' adding in an insane number of fandoms including ''Franchise/{{Shrek}}'', ''Franchise/StarWars'', ''Franchise/StarTrek'', ''Webcomic/OnePunchMan'' and ''Creator/ChuckNorris'' just to name a few.
262* Following a few years of doing ''Franchise/{{Lego}}''[=-=]only content, around late-2019 WebAnimation/{{Pantsahat}} expanded his StopMotionAnimation horizons, resulting in a crossover involving LEGO minifigures, [[Franchise/{{Halo}} Master Chief]], [[Literature/FateApocrypha Astolfo]], [[Toys/{{Bionicle}} a gangsta version of Tahu]], ComicBook/{{Batman}}, VideoGame/DukeNukem, [[Series/BreakingBad Walter White]], [[Franchise/StarWars Darth Vader]], and many more.
263* Since ''WebAnimation/{{Shrapnel}}'' is a StopMotion animated series that uses a mix of original/custom figures and figures/toys from other franchises, the cast is quite the mish-mash of characters, including but not limited too: LivingWeapon - WesternAnimation/{{Minions}}[[note]] (although their depiction/use in the first episode of ''KILL CONTRACT'' got the episode ScrewedByTheLawyers)[[/note]], [[Platform/{{Roblox}} robloxians]] trying to take over "Uganda" from the [[DiscreditedMeme Ugandan Knuckles]] to build a new server, [[WesternAnimation/MyLittlePonyFriendshipIsMagic Fluttershy]] as a mob boss(?), [[Franchise/{{Pokemon}} Lucario]] hanging out at a bar, etc.
264* ''WebAnimation/SmashBrosLawl'' is a series of video animation parodying the gameplay of VideoGame/SuperSmashBros with characters from various media ranging from [[VideoGame/TheLegendOfZeldaCDiGames King Harkinian]], [[Film/TheRoom2003 Tommy Wiseau]], [[VideoGame/YumeNikki Madotsuki]] and way more. It also inculde some original ideas like selectable announcers including [[Creator/MorganFreeman Morgan Freeman]], [[Creator/WillSmith Will Smith]] and some others.
265** It get's even worse when ''Lawl'' spawned a community with even more character like [=YTPGuy17=]'s ''Lawl'', Agito's ''Lawl X'', Skapokon's ''Lawl Nova'', [=ShadBad's=] ''Lawl Beatdown''; and [[OverlyLongGag so on]].
266* ''[[WebAnimation/SuperMarioGlitchy4sSuperMario64Bloopers SMG4]]'' has as its base the ''Franchise/SuperMarioBros'' franchise, like you'd expect. But over its long run it's added recurring characters from ''Franchise/TheLegendOfZelda'', ''VideoGame/Goldeneye1997'', ''Franchise/SonicTheHedgehog'', ''Franchise/KingdomHearts'', ''Franchise/{{Splatoon}}'', ''VideoGame/AnimalCrossing'', ''Franchise/ResidentEvil'', and of course [[VideoGame/{{Minecraft}} Steve]]. That list doesn't include the show's absurd number of cameos by meme characters OR its many {{original character}}s. The majority of the series being animated in VideoGame/GarrysMod certainly helps.
267* The "WebAnimation/SuperHeroBowl" series from [=ArtSpear=] Entertainment, in which fictional characters from over a hundred movies, TV shows and series exists in a paralle universe and have to fight each other to the death. The sequel ''WebAnimation/{{Fanfictasia}}'' is even more crowded, adding characters from animation and video games to the live-action ones.
268* ''WebAnimation/{{Tonin}}'': After the series ended, some characters featured in "Transando Essa Transa", a web animation story featuring characters from "Tonin" and from other series belonging to the same website, namely "Espinha & Fimose"; "Só Levando"; and "Tobby Entrevista".
269
270[[/folder]]
271
272[[folder:Web Original]]
273* Website/TVTropes:
274** TV Tropes has one for the works of the Walt Disney Company called WMG/FriendsAndTheHighCouncil.
275** TV Tropes' very own AlternateRealityGame ''ARG/TheWallWillFall'' has many fictional characters entering the real world.
276** TV Tropes also used to host a collaborative writing project called ''[[https://web.archive.org/web/20120602150222/https://tvtropes.org/pmwiki/pmwiki.php/Main/TVTropesTheTVShow TV Tropes the TV Show]]'', which was also based on the premise of countless fictional characters invading the real world, and tropers fighting back against them.
277* ''Website/TheFreeUniverse'' is a website dedicated to being a source of [[PublicDomainCharacter Public Domain Characters]] and elements from multiple sources for anyone to use. The characters can be used on their own and individually, or they can all be used as part of one crossover universe, the titular "Free Universe".
278* The Game in which ''WebVideo/LifeInAGame'' takes place seems to take ''all'' video games as true, with [[Franchise/TheLegendOfZelda Zelda]] appearing alongside [[Franchise/{{HALO}} Master Chief]], and [[VideoGame/ChronoTrigger Frog]] serving as the hero's {{Jerkass}} Mentor.
279* Website/ChannelAwesome:
280** The [[WebVideo/TGWTGYearOneBrawl one year anniversary video]]. Basically, in a Chicago hotel 20 contributors of {{Video Review Show}}s beat up one another in an UltimateShowdownOfUltimateDestiny, climaxing in [[spoiler:Super Mega Death Christ vs. Giant Robotic VideoGame/DonkeyKong Jesus riding a puff of smoke]] blowing up. You know what? [[http://thatguywiththeglasses.com/videolinks/thatguywiththeglasses/nostalgia-critic/6719-1-year-anniversary-video Just watch it.]]
281-->[[spoiler:'''[[WebVideo/AskThatGuyWithTheGlasses Ask That Guy]]:''']] (''speaking to the various reviewers present'') In fact, I think there's a lot of you who want to do crossovers, aren't there? Because everybody really eats that shit up.\
282'''Everybody:''' Yeah!
283** All the cast stayed in Chicago for a couple more days to film crossovers after this. Highlights include [[WebVideo/AtopTheFourthWall Linkara]] being force-read his ''own'' Massive Multiplayer Crossover fanfiction by the Sage, the [[ProfessionalWrestling Ultimate Warrior]] writes a comic series so bad that reality breaks down and Linkara and [[WebVideo/TheSpoonyExperiment Spoony]] keep changing into different AlternateUniverse selves and the Critic and [[WebVideo/TheAngryVideoGameNerd Nerd]] joining forces to review... a Making Of of a Franchise/TeenageMutantNinjaTurtles Tour. Yeah.
284** Later on when faced with Creator/UweBoll's ''Film/AloneInTheDark2005'', the Nostalgia Critic gave up on reviewing it. Until! [[WebVideo/TheSpoonyExperiment Spoony]] and [[WebVideo/AtopTheFourthWall Linkara]] arrived to assist him.
285** 2010 kicked off with an epic review of ''Film/DragonBallEvolution'', starring Paw, [=LordKat=], Rollo T, Hopewithinchaos, and Y Ruler of Time, with guests including [[WebVideo/YuGiOhTheAbridgedSeries LittleKuriboh]], [[WebVideo/DragonBallAbridged MasakoX]] and WebVideo/StopSkeletonsFromFighting. This was recorded while everyone was attending [[http://en.wikipedia.org/wiki/MAGFest MAGFest]].
286** The [[WebVideo/{{Kickassia}} Two Year Anniversary]] is another huge crossover event. And in turn, it allowed some once-in-a-lifetime crossovers as by this point, quite a few reviewers are from around the world.
287** In 2011, things repeated. Y Ruler of Time used [=MAGFest=] to do another multiple reviewer crossover (''Film/TheLastAirbender'', with WebVideo/ToddInTheShadows, WebVideo/JesuOtaku and WebVideo/RolloT, plus various cameos). And Year Three had a [[WebVideo/SuburbanKnights crossover series]] and various individual joint reviews (Todd even opens [[http://thatguywiththeglasses.com/videolinks/thatguywiththeglasses/specials/31178-bmbssm his one]] saying that the trip means crossovers... and gets shot down by three people before [[WebVideo/BadMovieBeatdown Film Brain]] accepts to watch a movie with him).
288** And once again in 2012. However, this time it was Linkara that used [=MAGFest=] for a multi-reviewer crossover (''Film/SouthlandTales''), and Year Four had [[WebVideo/ToBoldlyFlee a mini series that's a sequel to the previous one]] and more individual crossover videos.
289* WebVideo/HeroHouse: May be one of the most ambitious examples, featuring characters from comics, video games, manga and movies.
290* [[TropeNamers The original]] ''Music/TheUltimateShowdownOfUltimateDestiny'' flash video. Good guys; bad guys; explosions as far as the eye can see. Way too many pop culture icons to count.
291* ''[[http://keisuwabe.shikisokuzekuu.net/page035.html Symphony Of The Blood]]'', a fake video game crossover between all the characters of the [[ReusedCharacterDesign Star System]] of Creator/OsamuTezuka.
292* ''Franchise/TheSlenderManMythos'' stories tends to have the blogs mix together. For example, M of ''Blog/TheTutorial'' regularly participates in Damien's blog, ''Blog/DreamsInDarkness''.
293* Creator/JohnCWright has come up with a [[http://www.scifiwright.com/2014/05/alignments-in-amber/ campaign setting]] (further down the page; search for "multiverse game") which revolves around "anything goes", and incorporates roughly a billion various setting and universes (including the Franchise/CthulhuMythos, ''Literature/TheChroniclesOfAmber'', ''Series/DoctorWho'', ''Literature/LordOfTheRings'', etc.) into one complex setting rife with secret societies and inter-universal conflicts. As the author puts it:
294-->''In case this is unclear, this is a total ‘kitchen sink’ campaign, where anything and everything can be thrown into the mix, and the players can pick anything they want to play. There are no restrictions on race, class, type, powers, or anything.''
295* ''Series/WarpZoneProject'' happens in a world where all fiction is actually piece of earth's true history, which implies this trope coming into play.
296* Monsters of the Web (Formerly Ask Ticci Toby) by Team Rammyz is a Massive Multiplayer Crossover between popular [[Franchise/TheSlenderManMythos Slenderverse]] and {{Creepypasta}} characters. So far the series has introduced Slenderman, Ticci Toby, Hoodie and Masky from WebVideo/MarbleHornets, Kate the Chaser from SlenderTheArrival, Eyless Jack, Clockwork, Jeff the Killer, Homicidal Liu, WebVideo/BenDrowned, Jane the Killer and Laughing Jack with future plans to include Zalgo, Bloody Painter, The Puppeteer, Hobo Heart, The Rake, Jason the Toy Maker and even Lazari from the fancomic I Eat Pasta For Breakfast.
297* ''WebVideo/MonsterIslandBuddies'': Not only do we get characters of the Franchise/{{Godzilla}} franchise and many other kaiju films. Plenty of other fictional celebrities show up on a regular basis, ranging from Anime and Video Games, comics and other movies, to even the Franchise/DisneyAnimatedCanon. Some play prominent roles, such as [[ComicBook/FantasticFour Mr. Fantastic]] but most are usually cameos.
298* [[WebVideo/{{Vinesauce}} Vinny]]'s [[WebVideo/VinesauceTomodachiLife Tomodachi Life streams]] feature quite a cast, including [[Franchise/SuperMarioBros Peach, Bowser, Toad]], [[Franchise/TheLegendOfZelda Tingle, CDi Link]], [[VideoGame/AnimalCrossing Lolly]], [[VideoGame/PunchOut Little Mac]], [[Creator/ValveSoftware Gabe Newell]], Creator/GordonRamsay, Film/{{Seabiscuit}}, [[Franchise/StarTrek a Klingon]] (InNameOnly), and Music/DavidBowie.
299* ''LetsPlay/HoboBros'': The "Hobo Theatre" videos often use characters and items from a variety of video games and other works. For example, "Not Just Another Order" includes [[VideoGame/GrandTheftAutoSanAndreas Big Smoke]], [[Franchise/SuperMarioBros Luigi]], [[Franchise/{{Kirby}} Kabu]], Wrestling/JohnCena, and WesternAnimation/{{Goofy}}, among others. Justified in that these videos are made using ''VideoGame/GarrysMod'', which was specifically designed to incorporate all these elements and allow for crossovers like this.
300* The poster [[https://www.artstation.com/artwork/4LOqW "Universe: 113"]] by the artist Egor Klyuchnyk depicts a huge structure inhabited by lots of different characters from games, cartoons and movies.
301* In 2019, in the Comics and Cartoons board of [[Website/FourChan 4chan]], a webcomic named [[https://the-conservatory.fandom.com/wiki/Let%27s_Make_A_Comic! Let's Make a Comic!]] was released, which was the result of many comments building a story.
302* The ''WebSite/{{Cracked}}'' article [[https://www.cracked.com/pictofacts-1684-batman-papa-smurf-share-universe-we-can-prove-it This Shared Universe Isn't a Theory, It's Real]] postulates a single shared universe through 18 different crossovers, from ComicBook/{{Batman}} to Franchise/TheSmurfs, and honestly the route is even more circuitous than it sounds like it needs to be to connect those two. While this universe presumably isn't canon anywhere else, it appears in this article itself. It also specifically mentions a lot of different characters in this universe, since the chain mostly proceeds by the logic of character X having met character Y.
303[[/folder]]
304
305[[folder:Web Videos]]
306* WebVideo/ImAMarvelAndImADC has action figures from both universes mingling together with some wacky hijinks.
307* ''Webvideo/SonicStopmotionAdventures'' mainly uses ''Franchise/{{Sonic|TheHedgehog}}'' characters but it is not rare to see others from various franchises in some episodes.
308[[/folder]]
309
310[[folder:Western Animation]]
311* ''WesternAnimation/CaptainLaserhawkABloodDragonRemix'' is primarily inspired by the setting of ''VideoGame/FarCry3BloodDragon'' but features a vast array of characters and concepts from {{Creator/Ubisoft}}'s entire lineup of video game franchises and combines them into one unified setting, including ''VideoGame/BeyondGoodAndEvil'', ''VideoGame/WatchDogs'', ''VideoGame/SplinterCell'', ''Franchise/AssassinsCreed'', and ''{{VideoGame/Rayman}}''.
312* Creator/{{Disney}} has a long history of putting loads of their characters in the same universe. The most famous animated example would have to be ''WesternAnimation/HouseOfMouse'', which sees WesternAnimation/MickeyMouse and his friends as hosts of a nightclub venue, with characters from Disney's animated features as the audience.
313** Speaking of Disney, their ''WesternAnimation/ChibiTinyTales'' and ''Chibiverse'' cartoons feature SuperDeformed versions of characters from their movies, cartoons, and live action shows interacting with one other, ranging from ''WesternAnimation/PhineasAndFerb'' and ''WesternAnimation/TheOwlHouse'' to ''Film/{{Halloweentown}}'' and ''Film/HighSchoolMusical''.
314** For the 100th anniversary of the company, they reached the absolute apex with ''WesternAnimation/OnceUponAStudio'' which features characters from all the animated features in the Franchise/DisneyAnimatedCanon, along with characters from their various shorts and TV specials and even a handful of animated characters from their live-action films like the Penguins from ''Film/MaryPoppins'' and Elliot from ''Film/PetesDragon1977''.
315** A recent remake of the short called ''Fanfic/OnceUponAStudioVersionTwoPointOh'' takes this even further, and shows WesternAnimation/{{Moana}}'s father returning (voiced once again by Creator/TemueraMorrison), cameos by the Spring Sprite and Yo-Yo Flamingo from WesternAnimation/Fantasia2000, and even [[WesternAnimation/TheLionKing1994 Mufasa]] [[GhostReunionEnding in ghost form]].
316* Many classic Creator/HannaBarbera characters have been used across the board, in shows like ''WesternAnimation/LaffALympics'' and ''WesternAnimation/YogisGang''; this is still done, but with a more satirical bent (e.g., ''WesternAnimation/HarveyBirdmanAttorneyAtLaw''). The largest gathering of characters, however, came with the Hanna-Barbera 50th anniversary special in 1989 as all the characters gather together to pay tribute. This doubles as RogerRabbitEffect as they interact with Joe and Bill themselves, along with special hosts Creator/TonyDanza and Creator/AnniePotts.
317* Nearly all recent Creator/WarnerBros animated television series made references and overt cameos with one another.
318* The early-1990s [[VerySpecialEpisode public service announcement]] ''WesternAnimation/CartoonAllStarsToTheRescue'' had characters like the ''WesternAnimation/{{Teenage Mutant Ninja Turtles|1987}}'', ''WesternAnimation/TheSmurfs'', ''[[WesternAnimation/TheManyAdventuresOfWinnieThePooh Winnie the Pooh]]'', the cast of ''WesternAnimation/{{DuckTales|1987}}'', and many others team up to teach a single kid about the dangers of drugs [[spoiler:and save his sister from same]]. Although, if you can see Smurfs, there's a good chance that you're tripping balls already.
319* The 1980s cartoon ''WesternAnimation/DefendersOfTheEarth'' starred King Features' most famous adventure-hero characters: ComicStrip/FlashGordon, ComicStrip/ThePhantom, and ComicStrip/MandrakeTheMagician (along with his sidekick, the [[TheBigGuy strongman]] Lothar).
320* Much earlier, in 1972, the one-off animated special ''WesternAnimation/TheManWhoHatedLaughter'' united ''all'' of King Features' popular characters -- meaning not only Flash, the Phantom, Mandrake, and Lothar, but also the likes of ComicStrip/{{Popeye}}, ComicStrip/Blondie1930, ComicStrip/SnuffySmith, and ComicStrip/BeetleBailey.
321* ''WesternAnimation/CaptainNTheGameMaster'' featured a mishmash of characters who appeared on the Platform/NintendoEntertainmentSystem [[InNameOnly done wrong]]. Most of the episodes took place in the neutral Videoland, with characters like [[Franchise/{{Castlevania}} Simon Belmont]], VideoGame/MegaManClassic and [[VideoGame/KidIcarus Pit]] hanging around, even if InNameOnly. Link and Zelda from ''[[WesternAnimation/TheLegendOfZelda1989 The Legend of Zelda]]'' (cartoon) appeared too.
322* The Series/ChildrenInNeed music video "Peter Kay's Animated All-Star Band", which features nearly every significant British StopMotion characters with a few 2D British and American characters broadcast "live via satellite", including ''WesternAnimation/RoaryTheRacingCar'', ''WesternAnimation/FifiAndTheFlowertots'', ''WesternAnimation/TheWombles'', ''Series/InTheNightGarden'', ''WesternAnimation/AngelinaBallerina'', ''WesternAnimation/ScoobyDoo'', ''Series/{{Bagpuss}}'', ''WesternAnimation/BobTheBuilder'', ''WesternAnimation/{{Ben 10}}'', ''Series/{{Thunderbirds}}'', ''WesternAnimation/PostmanPat'', ''WesternAnimation/SpongebobSquarepants'', ''WesternAnimation/FiremanSam'', ''WesternAnimation/CamberwickGreen'', ''WesternAnimation/ThomasAndFriends'', ''WesternAnimation/{{Pingu}}'', ''Series/{{Teletubbies}}'', ''Series/TheSootyShow'', ''WesternAnimation/TheKoalaBrothers'', ''WesternAnimation/PeppaPig'', ''WesternAnimation/{{Rubbadubbers}}'', and ''WesternAnimation/{{Paddington|1975}}'' amongst others.
323** All singing parts of the characters by their original voice actors. The video took two years to produce, and it's for charity.
324* Done with advertising mascots in the short film ''WesternAnimation/{{Logorama}}''. It won the 2009 Oscar for Best Animated Short.
325* ''WesternAnimation/TheRoseyAndBuddyShow'', a 1992 TV special produced by Creator/{{Nelvana}}, featured not only animated versions of Series/{{Roseanne}} and Tom Arnold, but also the WesternAnimation/{{Care Bears|1980s}}, WesternAnimation/{{Beetlejuice}}, [[WesternAnimation/TomAndJerry Tom & Jerry]], WesternAnimation/{{Droopy}} and even [[WesternAnimation/WileECoyoteAndTheRoadrunner Wile E. Coyote]]'s stunt double.
326* Creator/AardmanAnimations made a Google Chrome commercial for Christmas 2012 that featured WesternAnimation/WallaceAndGromit making a conference call with [[WesternAnimation/ChickenRun Ginger]], [[WesternAnimation/CreatureComforts Captain Cuddlepuss and Trixie, the robins]], [[WesternAnimation/ShaunTheSheep Shaun's flock]], and [[WesternAnimation/AMatterOfLoafAndDeath Piella and Fluffles]].
327* The ''WesternAnimation/UncleGrandpa'' short "The Grampies" is an award show for Creator/CartoonNetwork stars be they from classic shows like ''WesternAnimation/DextersLaboratory'', ''WesternAnimation/JohnnyBravo'' and ''WesternAnimation/FostersHomeForImaginaryFriends'', or currently airing shows like ''WesternAnimation/RegularShow'' and ''WesternAnimation/TheAmazingWorldOfGumball''. There were even voiced cameos from WesternAnimation/StevenUniverse, [[WesternAnimation/AdventureTime Jake the Dog]], [[WesternAnimation/{{Clarence}} Belson]], [[WesternAnimation/ThePowerpuffGirls2016 and Reboot!Buttercup]], mostly complaining about how Uncle Grandpa is winning every award.
328* The ''WesternAnimation/OKKOLetsBeHeroes'' episode "Crossover Nexus" has K.O. team up with [[WesternAnimation/Ben102016 Ben 10]], [[WesternAnimation/StevenUniverse Garnet]], and [[WesternAnimation/TeenTitansGo Go!Raven]] to take down the villain Strike, who has been taking down heroes from across the Cartoon Network multiverse. This includes, but is not limited to: ''WesternAnimation/HiHiPuffyAmiYumi'', ''WesternAnimation/SymBionicTitan'', ''WesternAnimation/DextersLaboratory'', ''WesternAnimation/IAmWeasel'', ''WesternAnimation/MightyMagiswords'', ''WesternAnimation/TheAmazingWorldOfGumball'', ''WesternAnimation/UncleGrandpa'', ''WesternAnimation/SecretMountainFortAwesome'', ''WesternAnimation/RegularShow'', ''WesternAnimation/AdventureTime'', ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'', ''WesternAnimation/{{Chowder}}'', ''WesternAnimation/TimeSquad'', ''WesternAnimation/FostersHomeForImaginaryFriends'', ''WesternAnimation/EdEddNEddy'', ''WesternAnimation/WhateverHappenedToRobotJones'', ''WesternAnimation/CourageTheCowardlyDog'', ''WesternAnimation/SheepInTheBigCity'', ''WesternAnimation/WeBareBears'', ''WesternAnimation/MyGymPartnersAMonkey'', ''WesternAnimation/SquirrelBoy'', ''WesternAnimation/TheMarvelousMisadventuresOfFlapjack'', ''WesternAnimation/AppleAndOnion'', ''WesternAnimation/CraigOfTheCreek'', ''WesternAnimation/{{Clarence}}'', ''WesternAnimation/OverTheGardenWall'', ''WesternAnimation/{{The Powerpuff Girls|1998}}'', ''WesternAnimation/CowAndChicken'', ''WesternAnimation/CodenameKidsNextDoor'', ''WesternAnimation/CampLazlo'', ''WesternAnimation/JohnnyBravo'', ''WesternAnimation/SummerCampIsland'', ''WesternAnimation/GeneratorRex'', ''WesternAnimation/TheLifeAndTimesOfJuniperLee'', ''WesternAnimation/EvilConCarne'', ''WesternAnimation/MegasXLR'' and even ''WesternAnimation/TheMoxyShow''.
329* The ''Animaniacs'' revival does this with reuniting the Looney Tunes, the [[WesternAnimation/TinyToonAdventures Tiny Toons]], characters from Hanna-Barbera and ever-flippin' [[WesternAnimation/LoonaticsUnleashed Loonatics]].
330* Creator/AdultSwim, in 2003, had a [[NewYearHasCome New Year's Eve special]] that united all of their original properties at the time for a series of crossover shorts called "The Bashingtons" with the framing device of Brak's family from ''WesternAnimation/TheBrakShow'' inviting all the other Creator/AdultSwim characters over for a New Year's Eve party. However, it ended with ''WesternAnimation/TheBrakShow'' being officially canceled and Brak naturally being rather upset about it. The last bumper was Brak crying about being canceled as George Lowe (the voice actor for "Dad") complains about his inability to find work.
331* ''The Fantastic Funnies'' was a one-hour special showcasing the most American popular newspaper comics from the 1920s til the 1970s. While it was mostly a documentary that showed how comics were made behind the scenes and the impact these comics had on American culture, there was also a small skit that had hostess Creator/LoniAnderson interacting with the protagonists of ''ComicStrip/{{Peanuts}}'', ''Wee Pals'', ''[[ComicStrip/DennisTheMenaceUS Dennis the Menace]]'', ''[[ComicStrip/{{Nancy}} Nancy]]'', ''ComicStrip/LittleOrphanAnnie'', ''ComicStrip/Blondie1930'', ''ComicStrip/DickTracy'', ''[[ComicStrip/SnuffySmith Barney Google]]'', ''{{ComicStrip/AlleyOop}}'', ''{{ComicStrip/PrinceValiant}}'', ''[[ComicStrip/{{Pogo}} Pogo]]'', ''[[ComicStrip/{{Tumbleweeds}} Tumbleweeds]]'', ''Miss Peach'', ''[[ComicStrip/{{BC}} BC]]'', ''ComicStrip/{{BeetleBailey}}'', ''ComicStrip/{{Doonesbury}}'', ''ComicStrip/{{BroomHilda}}'', ''Drabble'', ''ComicStrip/{{Cathy}}'', ''ComicStrip/HagarTheHorrible'', ''ComicStrip/FredBasset'', ''ComicStrip/{{Marmaduke}}'', and "newcomer" ''ComicStrip/{{Garfield}}''.
332[[/folder]]

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