[[folder:Anime and Manga]]
* The ''GiantRobo'' {{OVA}} series featured characters taken from several other series Misuteru Yokoyama -- the original creator of ''GiantRobo''/''Johnny Sokko and His Flying Robot'' -- had written. This included adaptations of the medieval Chinese stories ''Romance Of The Three Kingdoms'' and ''The Water Margins'', which led to many main and secondary characters in ancient Chinese clothing coexisting with people in three-piece suits TwentyMinutesIntoTheFuture. It also included the very first MagicalGirl, ''Mahotsukai Sally'' (''Sally, the Witch''), under her original name "Sunny", as Shockwave Alberto's daughter.
* Legendary Manga 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]].
* ''[[http://www.bedetheque.com/Couvertures/DragonFall5_17022007.jpg DragonFall]]'' blended Manga/DragonBall, StarWars and [[http://fr.wikipedia.org/wiki/Dragon_Fall a whole bunch of other series]] into a parody. With mixed results.
* The intro to the RumikoTakahashi gallery show ''[[http://www.youtube.com/watch?v=kf953nWYSlA It's a Rumic World]]'' explicitly crosses over ''RanmaOneHalf, UruseiYatsura,'' and ''Manga/InuYasha''.
* ''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 ''TokyoBabylon'', as a major character, and during his series set in the early 90s it was said that he would have a role in EndOfTheWorldAsWeKnowIt that is X, making for a bit of {{foreshadowing}}.
* ''KyoshiroToTowaNoSora'' is primarily a crossover of the mangaka and studio's previous works: ''KannazukiNoMiko'', ''SteelAngelKurumi'', ''MagicalNyanNyanTaruto'', and ''UFOPrincessValkyrie''.
* Before ''Dengeki Gakuen RPG: Cross of Venus'' (mentioned below), there was [[http://www.youtube.com/watch?v=0CksYnT1qO8 this animated short]] produced for Dengeki Bunko's 2007 Movie Festival, featuring chibi versions of characters from ''KinosJourney, {{Inukami}}'' and ''ShakuganNoShana'' (Note that the chibi Shana here is '''not''' [[{{Omake}} Shana-tan]]; for one, ''she'' is the stalker rather than said omake series' Kazumi.).
* While most GoNagai series contain cameos here and there, the recent ''Anime/ShinMazinger'' seems to be going the whole way. Characters from several alternate versions of ''Anime/MazingerZ'' have shown up, as well as characters from ''Manga/ViolenceJack'' (itself, a DeconstructionCrossover) and the titular demon from ''Manga/MaoDante''. Unsurprisingly, this series is being directed by the same man behind ''GiantRobo'', Yasuhiro Imagawa.
** ''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'').
** GoNagai 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.
** ''Manga/SuperRobotRetsuden'', with story and art by 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.
** 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''.
* The ''PrettyCureAllStars'' movie series allows the Cures from the past seasons to meet (and be friends with) the new team.
* About a week after the debut of the film ''Manga/DragonBall Z: Battle of Gods'', Goku and his friends turned up in the latest annual ''Manga/OnePiece'' and ''{{Manga/Toriko}}'' crossover episode.
[[/folder]]

[[folder:Comic Books]]
* ''TheLeagueOfExtraordinaryGentlemen'' has a SuperHero team composed of multiple [[PublicDomainCharacter public domain characters]].
* ''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.
* ''{{Fables}}'' is about various figures from fairy tales and folklore living secretly in a neighborhood in NYC.
* ''{{Planetary}}'' is about an investigative super-team in the Wild Storm universe. Their members have had run-ins with {{Dracula}}, SherlockHolmes, Jenny Sparks from ''TheAuthority'' and multiple versions of Comicbook/{{Batman}}.
* ''[[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.
* ''ComicBook/JoeTheBarbarian'' does this in a manner similar to ''The Indian In the Cupboard''.
* A non-canon ''JudgeDredd'' story in the 1980 ''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.
* The AlanMoore comic {{Albion}} shoves together a whole bunch of British comic characters of varying obsurity, most of whom are imprisoned by the Government as part of TheMasquerade.
* {{Shi}} / {{Cyblade}}: The Battle for Independents featured many independent comic book characters, including {{Cerebus}}, {{Bone}}, ComicBook/{{Hellboy}}, Comicbook/{{Madman}}, MegatonMan, ScudTheDisposableAssassin, WesternAnimation/TheTick and UsagiYojimbo. Many of the same characters have also appeared in the {{normalman}}/Megaton Man special, {{Gen 13}} ABC and WarOfTheIndependents.
* ''FreddyVsJasonVsAsh'', and its sequel ''Freddy vs. Jason vs. Ash: The Nightmare Warriors''.
* Creator/DarkHorseComics had ''Franchise/{{Alien}} versus Franchise/{{Predator}} versus Franchise/{{Terminator}}'', 'Franchise/'{{Superman}} and Franchise/{{Batman}} versus Franchise/{{Alien}}s and Franchise/{{Predator}}'', and two miniseries that crossed over ''ComicBook/{{Witchblade}}'', ''Aliens'', ''ComicBook/TheDarkness'' and ''Predator''.
* ''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]], {{Faust}}, almost all Creator/WilliamShakespeare's protagonists, FrankensteinsMonster, RobinHood, the Literature/{{Ivanhoe}} cast and others, while Nightmare gains allies in the Sheriff of Nottingham, {{Dracula}} and [[TreasureIsland Long John Silver]]. Many other characters like {{Tarzan}} make cameos and in the end Johnny summons [[LawyerFriendlyCameo lawyer friendly versions]] of JamesBond, [[{{Transformers}} Megatron]], StevenSeagal and ChuckNorris to defeat Nightmare's army.
[[/folder]]

[[folder:Commercials]]
* A recent [=MasterCard=] commercial featured several food mascots (from Count Chocula to the Pillsbury Doughboy) eating dinner -- with [[CrowningMomentOfAwesome Mr. Clean doing the dishes]].
* USA Network's commercials play this for laughs, having various combinations of characters from their shows (''Burn Notice'', ''Monk'', ''Psych'', others) encounter each other and make idle conversation.
* UK example: [[http://www.youtube.com/watch?v=BCfGC_dGn4M The Greatest Minds In Advertising Join Forces]] in a 2009 viral for ''UsefulNotes/ComicRelief''.
* The MetLife insurance company has released an ad featuring characters from "Peanuts," "Looney Tunes," Hanna-Barbera, and many other animation studios.
* An advertising campaign for Krystal has a red-haired girl, a [[UsefulNotes/McDonalds clown]], and a guy in a [[Advertising/TheBurgerKing creepy mask]] passing up their respective restaurants to get some food from Krystal.
[[/folder]]

[[folder:Film]]
* ''Film/WhoFramedRogerRabbit'' crossed over Disney characters with Warner Bros. and MGM characters, 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 Los Angeles and half AlternateUniverse.
* ''Film/TheMonsterSquad'' had Dracula as the BigBad who controlled all of the other classic movie monsters: [[{{Frankenstein}} Frakenstein's Monster]], the WolfMan, the Film/CreatureFromTheBlackLagoon and the {{Mummy}}. There is also a cameo by Abraham Van Helsing.
* [[http://video.yahoo.com/watch/411762/2393937 The Area 52 scene]] in ''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]]!''
* Many 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. By all rights, this really ''should'' produce something worth watching on some level.
* A version of this in ''Film/StarTrekGenerations'', which featured the captains of two Enterprises from completely different eras (Kirk and Picard) in the same film. ''Franchise/StarTrek'' has done this numerous times, if you consider the different series separate entities of the same intellectual property.
* ''Film/VanHelsing'', which features the eponymous monster hunter battling Dracula, a werewolf, Frankenstein's Monster, Igor and Mr. Hyde.
* Done with toys in ''Film/TheIndianInTheCupboard''.
* And with horror-movie creatures in the ''Waxwork'' movies.
* ''WesternAnimation/ToyStory'' features many toys from rival companies as major or minor characters including Mr. Potato Head, Barbie, and Legos among many others. (And probably some [[{{Expy}} expies]] too.)
* ''Film/TheAvengers'' serves as this for the MarvelCinematicUniverse.
* 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'', ''DavyCrockett'', ''TheLifeAndLegendOfWyattEarp'', ''Series/{{Gunsmoke}}'', ''WagonTrain'', ''[[RoyRogers The Roy Rogers Show]]'' and ''Series/{{Maverick}}''.
* In the 40th Anniversary ''OOO, Den-O, All Riders: Let's Go KamenRider'' has all of the main riders from [[Series/KamenRider Kamen Rider #1]] to ''KamenRiderOOO''.
* The ''WesternAnimation/{{Shrek}}'' films do this to fairy tale characters.
* ''Disney/WreckItRalph'' does this with arcade video game characters.
[[/folder]]

[[folder:Literature]]
* ScienceFiction author Creator/PhilipJoseFarmer:
** The ''[[http://en.wikipedia.org/wiki/Wold_Newton_family Wold-Newton]]'' [[TheVerse universe]] includes scores of [[PublicDomainCharacter public domain characters]] as well as many characters popular from early RadioDrama and film, such as TheShadow and Tarzan, who are not quite out of copyright. [[{{Fanfic}} Fans]] have added many modern TV characters to the list.
** The ''Literature/{{Riverworld}}'' series does this with actual people from history.
* Creator/KimNewman once wrote a short story about Terry and Bob of the British sitcom ''Series/TheLikelyLads'' fighting in the Vietnam war with William of Richmal Crompton's old ''Literature/JustWilliam'' stories and other fictional characters. In fact, Kim Newman does this a ''lot'', most notably ''Literature/AnnoDracula'', which features [[http://www.pjfarmer.com/woldnewton/AnnoDracula.htm just about everyone]].
* ''Silverlock'' by John Myers Myers, in which the protagonist A. Clarence Shandon is shipwrecked in the Commonwealth of Letters, where everywhere he goes and everyone he meets is a literary, mythical and/or historical reference. A fairly extensive list of specific references can be found [[http://www.anitra.net/commonwealth/refindex.html here]].
* Creator/RobertAHeinlein's ''Literature/TheNumberOfTheBeast'' features a TimeTravel device that does double duty as a portal into TheMultiverse, allowing his characters to visit every fictional universe ever, including all of Heinlein's own novels. They coin the term "World as Myth" to describe the RecursiveCanon necessary to make this work, and wind up hosting a convention for just about every ScienceFiction character ever.
* Spider Robinson's ''Literature/CallahansCrosstimeSaloon'' series - including ''Callahan's Lady'' - contains cameos from characters created by crime writer Donald E. Westlake, SF legend Robert Heinlein, and even classic British humorist Creator/PGWodehouse, all interacting with each other. (Most likely inspired by Heinlein's ''Literature/TheNumberOfTheBeast'', mentioned above.)
* SimonRGreen's ''{{Nightside}}'' take place in a secret city under London that's a giant crossoverfest. John Taylor, Green's protagonist, has met characters from all manner of books, movies, television shows, and other assorted places though they are largely referred to in vague, shadowy terms so he doesn't violate the copyrights too badly. There's everything from a [[Series/DoctorWho Traveling Doctor]] who had a trick with celery to having to exorcise Kandarian demons from his answering machine to giant 'bears of little brain' that work for the auction house. For even more fun, representatives from most of Green's other series (the ''Literature/{{Deathstalker}}'' novels, the ''Darkwood'' books, etc) show up, waiting around to speak to Father Time.
* While NeilGaiman's short story ''A Study in Emerald'' is primarily a crossover between the works of Creator/HPLovecraft and Arthur Conan Doyle, it contains subtle hints that characters such as {{Dracula}}, {{Frankenstein}}, and Dr. Jekyll also exist in the same universe.
* Creator/RogerZelazny took a few stabs at this trope:
** ''Literature/ANightInTheLonesomeOctober'' features JackTheRipper, SherlockHolmes, {{Dracula}}, {{Frankenstein}}, Rasputin, Film/TheWolfMan1941, and many others in a complex game determining whether or not {{Cthulhu}} and the other elder gods return to Earth. Interestingly, Jack is the hero...
** And again in ''Roadmarks'' where Red runs across a short man with a small mustache whom Red refers to as "Adolph" driving a battered black Volkswagen, and later on in the book he makes a call to someone he calls "Doc", who is described as "A big golden-eyed guy with one hell of a suntan, wearing a torn shirt, and driving a hot little 1920's roadster" which could only have been DocSavage. DocSavage villain John Sunlight also makes an appearance.
** Zelazny was a comic book reader and fan. In ''[[Literature/TheChroniclesOfAmber Blood of Amber]]'' Merlin has dinner at Bloody (Last Deceased Owner's Name)'s place--Boody Andy's at the time--while a gent (with a pronounced scar through his eye) eats at a neighboring table and warns Merlin to show a blade so the local roughs get no ideas. "Old John" was clearly John Ostrander and Tim Truman's mercenary John Gaunt (aka Grinner, GrimJack) from Cynosure, a cross-dimensional city in a multiverse adjacent to Amber. The two roughs did not last the night.
* The works of Creator/DrSeuss were combined into a Broadway musical called ''{{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.
** Jim Henson's ''The Wubbulous World of Dr Seuss'' did something similar, with Yertle the Turtle as a recurring villain.
* Stephen King's ''Franchise/TheDarkTower'' series spans across the majority of his prior works.
* The ''HaroldShea'' series of short stories are about Harold and company visiting various [[TheVerse settings]] taken from mythology and [[PublicDomainCharacter public domain fiction]], usually one per story.
* Brazilian author [[http://en.wikipedia.org/wiki/Monteiro_Lobato Monteiro Lobato]] took this trope to [[RuleOfCool insane]] [[ThereIsNoKillLikeOverkill levels]] in his kid's books set in the ''Yellow Woodpecker Farm''. The eponymous farm is an interdimensional nexus to, essentially, every fantasy and adventure fiction character ever written, including but not limited to the Greek Gods, SherlockHolmes, the Neverland people, the ''Literature/ArabianNights'', the fables from Creator/{{Aesop}}, [[Creator/TheBrothersGrimm Grimm]], [[Creator/HansChristianAndersen Andersen]], Literature/TheThreeMusketeers, medieval Knighs etc etc etc ad infinitum. He even managed to throw in some characters copyright laws didn't allow him to. To top if off, characters native to the series' own universe are not few in number.
* JasperFforde's like this trope a lot. Pretty much every Bookworld character in the Literature/ThursdayNext series comes from another book. According to the rules of its [[TheVerse universe]] ''every'' book crosses over with it. [[MetaFiction Including itself]]. Many of the characters from the Nursery Crimes series [[ExactlyWhatItSaysOnTheTin are right out of]] {{nursery rhyme}}s.
* Peter David wrote two novels where X-Men characters appeared in the Star Trek: The Next Generation universe.
* Creator/LFrankBaum did this in the fourth book of the Oz series, ''The Road to Oz,'' by inviting characters from his other books to attend Princess Ozma's birthday party, hoping to get his Oz readers interested in those other non-Oz stories. This included everybody up to and including SantaClaus (as in ''The Life and Adventures of''). The implication, of course, is that every book Baum ever wrote takes place in the same universe as the Oz books.
* James A. Owen's ''Chronicles of the Imaginarium Geographica'' does this with pretty much every major work of fantasy, history, and real life. It's awesome.
* In Creator/AletheaKontis's ''Literature/{{Enchanted}}'', multiple fairy tales are true, from the red shoes that dance Tuesday to death, to Monday being the princess in the Princess and the Pea, to Sunday's meeting up with the Frog Prince, and the whole family living in what was once Rapunzel's tower.
* In Creator/EDBaker's ''Literature/TheWideAwakePrincess'', Literature/SleepingBeauty's younger sister is wary because of the tale of LittleRedRidingHood, meets up with HanselAndGretel at the witch's, etc.
[[/folder]]

[[folder:Live Action TV]]
* The "Night of Elizabeth Taylor", broadcast on CBS around 1995-96, saw a diamond necklace lost by ElizabethTaylor became a common plot element linking four {{SitCom}}s -- ''TheNanny'', ''Cant Hurry Love'', ''MurphyBrown'' and ''High Society'' -- in one massive crossover. It was intended as an embedded advertisement for Taylor's new perfume, Black Pearls.
* Disney did a triple-episode MMC with three of its shows. The show was entitled ''[[ThatsSoRaven That's So]] [[TheSuiteLifeOfZackAndCody Suite Life Of]] HannahMontana'', with one classed as a Suite Life episode, one as a Raven episode, and one as a Hannah Montana episode, where Hannah and Raven visited the hotel the twins live in.
** Likewise, there's the ''Wish Gone Amiss'' triple-episode, except it is more loosely tied together. It all involves the title characters from ''CoryInTheHouse'', ''TheSuiteLifeOfZackAndCody'', and ''HannahMontana'' making a wish on apparently the same shooting star. Each episode has its own method of returning to the [[StatusQuoIsGod Status Quo]] -- Cory gets a literal ResetButton, Zack and Cody's wish was [[AllJustADream all just Zack's dream]], and Hannah returns her life to normal when Jackson unwittingly wishes that the world did not know Hannah's double life.
** There's also the ''[[WizardsOfWaverlyPlace Wizards]] [[TheSuiteLifeOfZackAndCody On Deck]] with HannahMontana'' that goes by the same formula that the ''That's So Suite Life of Hannah Montanna'' did, except with the stars visiting the hotel's ship instead of the hotel itself.
* ''KamenRiderDecade'' is this in regards to the Heisei era ''KamenRider'' shows. The main character dimension jumps into {{alternate universe}}s based on the 9 previous ''KamenRider'' series of the last 10 years (as well as the canonical universe of ''SamuraiSentaiShinkenger''). Plus, the first movie features every main Rider created before Decade, even ones that only had appeared in one-shot movies previously.
** The second movie, a GrandFinale, even includes some {{postmodern|ism}} commentary on the "interesting effects on the fiction chosen" mentionned in the opening paragraphs. To quote the original universe [[KamenRiderKiva Wataru]]: "The tales of the Riders were something that would be eventually lost to time. But because of Decade's battles, they will remain fresh in people's minds..."
* Similarly to ''KamenRiderDecade'', ''Series/KaizokuSentaiGokaiger'' is a crossover series. But compared to ''Decade'', in which the main character could only be Riders of the last decade, the Gokaigers can transform into any of the Sentai from the past 34 teams (barring {{Sixth Ranger}}s - that is, until their own SixthRanger joined up). Additionally, while ''Decade'' established that every past ''Kamen Rider'' was its own universe, ''Gokaiger'' establishes that all SuperSentai took place in a single universe.
** There's also ''Film/KaizokuSentaiGokaigerVsSpaceSheriffGavanTheMovie'' - yeah, that means the [[SpaceSheriffGavan Space]] [[SpaceSheriffSharivan Sheriff]] [[SpaceSheriffShaider Trilogy]] is revealed to be set in the Sentai universe too.
*** Perfectly justified that Inazuma Ginga in [[TaiyouSentaiSunVulcan Sun Vulcan]] episode 45 was wanted by the Galactic Police. Shozo Uehara who wrote the character would be the main writer of the Space Sheriff trilogy.
** It all comes to a head with ''Film/KamenRiderXSuperSentaiSuperheroTaisen''.
* ''[[http://www.childrenspartyatthepalace.com/ The Children's Party at the Palace]]'', a British production broadcast live from Buckingham Palace on June 25, 2006, celebrated Queen Elizabeth II's 80th birthday with a wild romp featuring dozens of literary and TV characters including (among many others) Cruella [=DeVille=], PeterPan and Captain Hook, Sir Topham Hatt from ''ThomasTheTankEngine'', WallaceAndGromit, the White Rabbit from ''Literature/AliceInWonderland'', EnidBlyton's ''The Famous Five'', HarryPotter, Ron Weasley, Hermione Granger and Neville Longbottom from the ''Film/HarryPotter'' movies, and starred the Queen as herself.
* The ''Series/SabrinaTheTeenageWitch'' episode "Inna-Gadda-Sabrina" extended its story through the following three shows that night: ''BoyMeetsWorld'', ''You Wish'', and ''TeenAngel''. Each show was set in a different time period in going with the theme.
** It wasn't the first time - in fact, quite a few crossovers spanned the entire TGIF lineup from time to time, and even an occasional though less involving tie-in for all ABC weekly sitcoms during this period.
** There was also one that was linked by Steve Urkel. He ends one episode of ''FamilyMatters'' by blasting through the Winslow's roof in a jet pack, and he crashes into the Lambert's roof at the beginning of the an episode of ''StepByStep'' where the plot centers around him. I forget if any other shows were connected as well.
* A very simple one, but the ''iStart A Fan War'' episode of ''Series/ICarly'' included characters from DrakeAndJosh and {{Zoey 101}}, helping to fill out the NickVerse.
* ''Film/AMuppetFamilyChristmas'' included characters from all Muppet-related programmes: ''TheMuppetShow'', ''SesameStreet'', ''FraggleRock'' and even ''MuppetBabies''.
** Its conclusion even featured [[CrowningMomentOfHeartwarming a brief cameo of Jim Henson as himself]].
* In ''Series/DoctorWho'', the climax of the Second Doctor serial ''The Mind Robber''. D'Artagnan vs. Cyrano de Bergerac! Blackbeard vs. Sir Lancelot! Plus Gulliver and Rapunzel on the sidelines.
* ''LawAndOrder'' crossed over with ''HomicideLifeOnTheStreet'' a few times, until they eventually just decided they were set in the same continuity altogether, to the point of having JustForFun/JohnMunch, who originated in the latter show, permanently set up shop in the former.
* [[http://home.vicnet.net.au/~kwgow/crossovers.html The Tommy Westphall Hypothesis]] states that dozens if not hundreds of television series have all happened within the mind of [[StElsewhere a young autistic boy living in Baltimore]].
** JustForFun/JohnMunch is a central figure in this Hypothesis.
* ''TheEarthDaySpecial'', which aired on Creator/{{ABC}} in 1990, was a huge crossover featuring just about every pop culture icon from TheEighties in a very bizarre, thoroughly nonsensical plot.
** Also in 1990, ''CartoonAllStarsToTheRescue'', the ultimate VerySpecialEpisode combining well over a dozen Eighties cartoon characters. Aired once and only once, it's full of {{Narm}} yet also bizarrely entertaining. Rumor has it that it's never been aired since because Jim Davis claimed he hadn't authorized {{Garfield}}'s inclusion in the show.
* In the ''Series/{{CSI}}''-verse, the original series crossed over with the Miami series in 2002 to serve as the pilot for the latter; the Miami series then crossed over with the New York series in 2004 to serve as that series' pilot, and the series crossed over again in a two-hour storyline in 2005. The original series also crossed over with ''Series/WithoutATrace'' in 2007 a two-hour storyline across both series. Following the departure of William Petersen (who opposed the spinoffs and did not appear in any scenes featuring the Miami team in "Cross Jurisdictions"), CBS put together a massive crossover in 2009 spanning all three series that involved the Las Vegas series' Raymond Langston going to Miami and New York while investigating a human trafficking organisation.
* The 2009 ''TwoPintsOfLagerAndAPacketOfCrisps'' UsefulNotes/ComicRelief special, which brought in characters from BBC Three's other sitcoms ''{{Grownups}}'' and ''ComingOfAge''. And yes, Sheridan Smith was ActingForTwo.
* The second western MMC took place a year after the first on what seemed to be an ordinary episode of ''Series/{{Maverick}}'' called "Hadley's Hunters"; during the course of that hour he ran into people from 5 other shows: ''Series/{{Lawman}}'', ''{{Cheyenne}}'', ''{{Bronco}}'', ''{{Sugarfoot}}'', and he stops by the office from ''{{Colt 45}}'' but nobody was home (a reference to the show being recently canceled).
** Strangely he also ran into the parking lot attendant from ''77SunsetStrip'' which was set in the 1960s -- I guess he had an ancestor who lived in the old west.
* The final western MMC took place over 30 years later in the made for tv movie ''The Gambler Returns: The Luck of the Draw'', where the title character crosses over with 10 different series. During the course of the film TheGambler meets people from ''BatMasterson'', ''TheLifeAndLegendOfWyattEarp'', ''Series/{{Maverick}}'', ''{{Cheyenne}}'', ''Series/KungFu'', ''Series/TheRifleman'', ''TheWesterner'', ''TheVirginian'', and ''{{Rawhide}}'', plus the main game was in honor of the main character from ''HaveGunWillTravel''.
* ''Series/OnceUponATime'' is having a lot of fun with this trope. King Midas, Captain Hook, Lancelot (apparently Moorish in this timeline), and Mulan have all shown up. Literature/{{Snow White|and the Seven Dwarfs}} is the schoolteacher, Granny and Red Riding Hood run the diner, and the Wicked Stepmother getting therapy from Jiminy Cricket. Yeah. [[DisneyOwnsThisTrope The show's run by Disney, why do you ask?]] 
[[/folder]]

[[folder:Music]]
* In the hip hop world this is known as a "posse cut," which is a song that features at least four consecutive verses by a different rapper. For example, "The Anthem" by Sway & King Tech, featuring RZA, Tech N9ne, {{Eminem}}, Xzibit, Pharoahe Monch, Kool G Rap, Jayo Felony, Chino XL, and KRS-One.
* Pigface is the side project of [[RevolvingDoorBand over one hundred musicians]]. While their individual tracks typically don't have a massive number of musicians, the credits to their albums are quite staggering, as most of them feature well over a dozen performers.
[[/folder]]

[[folder:Mythology and Religion]]
* The ''{{Argonautica}}'' (a.k.a. ''Jason and the Argonauts'') by Apollonius of Rhodes (3rd century BCE) is one of the very first {{Massive Multiplayer Crossover}}s, 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 MassiveMultiplayerCrossover OlderThanFeudalism.
** Many of the same characters also appear in the story of the Kalydonian Boar Hunt - which, DependingOnTheAuthor, may occur before or after ''The Argonautica''.
* According to some religious studies texts, this has also gone on in many, ''many'' other myths: the most notable involve various saints meeting each other. This goes on even today.
[[/folder]]

[[folder:New Media]]
* Weezer's [[http://www.youtube.com/watch?v=muP9eH2p2PI Pork And Beans]] music video. It's got almost everything that ever appeared on Youtube short of OK Go and WebVideo/TheAngryVideoGameNerd.
** There's an [[http://www.youtube.com/watch?v=xjbahK6Rk0U updated version]]. It is as though the internet gave birth.
* 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.
[[/folder]]

[[folder:Stand Up Comedy]]
* There's a ''Franchise/StarTrek''-related comedy routine in which Mr. Spock, the [=HAL=] 9000 computer, and 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.]]
* Stand-up comedy troupes sometimes feature a series of comedians who usually headline their own shows:
** ''The Original Kings of Comedy''
** ''The Blue Collar Comedy Tour''
** ''The Comedians of Comedy''
[[/folder]]

[[folder:Tabletop Games]]
* The {{Spelljammer}} and {{Planescape}} settings were designed with this in mind. Spelljammer in particular has rule books dedicated to detailing the Crystal Spheres of settings such as [[{{Dragonlance}} Krynn]], [[ForgottenRealms Abeir-Toril]], and [[{{Greyhawk}} Oerth]]. Where as Planescape has portals to every type of world imaginable.
* {{Collectible Card Game}}s that operate off of a UniversalSystem allow for this; the Universal Fighting System lets you pit [[StreetFighter Chun-Li]] against [[SoulSeries Nightmare]], the VS System crosses over {{Marvel}} and {{DC}}, and the Crusade System lets you pair [[Anime/CowboyBebop Spike Spiegel]], [[Manga/FullmetalAlchemist Edward Elric]], and CutieHoney with HumongousMecha from ''{{Macross}}'', ''SuperRobotWarsOriginalGeneration'', and countless others.
* Similarly, the HeroClix tactical miniature combat game works on a PointBuySystem 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. 
[[/folder]]

[[folder:Video Games]]
* ''VideoGame/DisneyInfinity'' an upcoming video game with a 'toybox' mode that allows player to mix and match characters from Disney and Pixar movies.
* ''VideoGame/TheKingOfFighters'' was the original crossover fighter, taking characters from several {{SNK}} series including ''VideoGame/FatalFury'', ''VideoGame/ArtOfFighting'', ''VideoGame/PsychoSoldier'' and ''VideoGame/IkariWarriors''.
** ''VideoGame/NeoGeoBattleColiseum'' is an extension of the above, including also characters from ''VideoGame/SamuraiShodown'', ''VideoGame/TheLastBlade'', ''VideoGame/WorldHeroes'', ''AggressorsOfDarkKombat'' and even ''VideoGame/MetalSlug''!!!
** ''The King Of Fighters XI'' also threw in ''Buriki One'' and the FuunSeries in the list of games represented in the series.
* A staple of store demo displays in the later 90s, Sega produced ''VideoGame/FightersMegamix'', a crossover of ''VideoGame/VirtuaFighter'', ''VideoGame/FightingVipers'', and a couple one-off games such as ''VideoGame/VirtuaCop'', ''VideoGame/SonicTheFighters'', and even ''VideoGame/DaytonaUSA''.
* [[CapcomVsWhatever Capcom's "VS" series]]:
** The MarvelVsCapcom games, (''VideoGame/{{X-Men vs Street Fighter}}'', ''VideoGame/MarvelSuperHeroesVsStreetFighter'', ''VideoGame/MarvelVsCapcomClashOfTheSuperheroes'', ''VideoGame/MarvelVsCapcom2'' and now ''VideoGame/MarvelVsCapcom3'') pit the characters of the various game series produced by {{Capcom}} against the heroes and villains of the MarvelUniverse in, naturally, a fighting tournament. Only the sketchiest rationale is drawn for this.
** Following this is the SNKVsCapcom series, (''VideoGame/SNKVsCapcomTheMatchOfTheMillennium'', ''VideoGame/CapcomVsSNKMillenniumFight2000'', ''VideoGame/CapcomVsSNK2MarkOfTheMillennium'' and ''VideoGame/SNKVsCapcomSVCChaos'') basically putting the characters of [[{{Capcom}} both]] [[{{SNK}} companies]]' FightingGame series against each other. A spinoff series known as ''SNK vs. Capcom: Card Fighters'' is a TCG pulling characters from both companies' entire libraries.
** And then there is ''VideoGame/NamcoXCapcom'', a action/strategy RPG featuring characters from {{Namco}} and {{Capcom}}.
** ''VideoGame/StreetFighterXTekken'' and ''Tekken x Street Fighter'' however are actual fighting games featuring Namco (''VideoGame/{{Tekken}}'') and Capcom (''StreetFighter'') characters.
** Only related through the VS. series via the appearance of ''one'' Capcom series rather than ''multiple'' but what the heck: ''VideoGame/CrossEdge'' is a RPG with Compile Heart at the helm of development. Characters from ''VideoGame/{{Darkstalkers}}'', ''ArTonelico'', ''VideoGame/{{Disgaea}}'', ''Spectral Souls'', ''[[AtelierSeries Atelier Marie]]'' and ''[[AtelierSeries ManaKhemia]]'' show up in this one.
** There's also ''VideoGame/TatsunokoVsCapcom'', which returns to the gameplay of the Marvel series but instead pits the Capcom characters against the works of TatsunokoProductions like ''[[Anime/ScienceNinjaTeamGatchaman Gatchaman]]'' and ''Casshern''. It is basically ''Marvel vs. Capcom'' using Japan's Marvel.
** ''VideoGame/ProjectXZone'' is an upcoming SpiritualSuccessor to ''VideoGame/NamcoXCapcom'', only now adding {{Sega}} (and technically {{Bandai}} of NamcoBandai, with ''SuperRobotWarsOriginalGeneration'', and ''Franchise/DotHack'' being Bandai's franchises before the merger with Namco) into the mix.
* Even before ''Tatsunoko vs. Capcom'', there was a FightingGame called ''TatsunokoFight'', which pitted four Tatsunoko superhero anime (and one original made-up anime) characters, along with their females/sidekicks and villains.
* Capcom's own MascotFighter: ''VideoGame/CapcomFightingEvolution''. The only game where we were able to have a [[StreetFighter Zangief vs. Alex]] fight, and which not only had the distinction of being the only Capcom-made[[note]]''VideoGame/SNKVsCapcomSVCChaos'' doesn't count, it was made by {{SNK}}[[/note]] crossover not featuring [[VideoGame/{{Darkstalkers}} Morrigan]], (Anakaris, Demitri, Felicia and Jedah, plus Pyron as one of the final bosses, were the VideoGame/{{Darkstalkers}} representants) but also the only game where we were able to fight as one (or two) of the RedEarth characters who aren't Tessa. (Leo, Hauzer, Hydron and Kenji were the representants)
* In contrast, the ''VideoGame/SuperRobotWars'' series (almost certainly the originator of this trope in video game form) has magnificent, complex plots, and the individual games have touched upon nearly every HumongousMecha series in existence. Particular of note is how they merge individual ''episodes'' to make missions, including having the famous "dancing" episode of ''Anime/NeonGenesisEvangelion'' set on {{Macross}} Island.
** Additionally, ''SuperRobotWarsOriginalGeneration'' is a Massively Multiplayer Crossover of various ''Super Robot Wars'' [[OriginalGeneration original characters]] (as each ''Super Robot Wars'' sub-series is set in its own universe)
*** Furthermore, ''VideoGame/SuperRobotWars OG Saga: VideoGame/EndlessFrontier'' is a crossover between ''SuperRobotWarsOriginalGeneration'' and ''VideoGame/NamcoXCapcom'' (minus the Capcom) - making it a crossover between a crossover between crossovers and-- oh dear...
** And to top it all off, ''AnotherCenturysEpisode'' is ''VideoGame/SuperRobotWars'' [[MixAndMatch using the system from]] ''VideoGame/ArmoredCore''.
* ''VideoGame/ChaosWars'' uses a similar SRPG system to ''Super Robot Wars'', but instead has more typical JRPG heroes from Atlus, RED, Idea Factory, and Aruze. This doesn't sound all that impressive -- outside of Atlus and ''maybe'' Idea Factory those companies are virtually unknown in the States, until you realize this includes ''ShadowHearts'' (Aruze), ''Growlanser'' (Atlus), ''Spectral Souls'' (Idea Factory), and ''{{Gungrave}}'' (RED). A sequel has been talked about, and there are hints that ''Franchise/ShinMegamiTensei''/''VideoGame/{{Persona}}'' characters may make it in, and that NipponIchi might be invited to join the other 4 designers in the next series.
** And ditto ''VideoGame/TrinityUniverse'', which will have two story modes -- one with NipponIchi (VideoGame/{{Disgaea}}) characters, and one with {{Gust}} (AtelierSeries) characters. It apparently revolves around someone throwing trash into Laharl's back yard. Gust and NIS are making a habit of doing these crossover games -- NIS also has a habit of localizing all of Gusts' releases in the states, too.
* Yet another pastiche of ''SRW'' would be ''BattleMoonWars'' which merges the three major published {{Nasuverse}} canons together: ''{{Tsukihime}}'', ''VisualNovel/FateStayNight'', and ''KaraNoKyoukai''.
* ''VideoGame/SuperSmashBros'' has a number of first- and second-party Nintendo characters fighting each other - and the third iteration of the series, ''Super Smash Bros. Brawl'', has taken it a step further, including Solid Snake from Konami's ''Franchise/MetalGear'' games and Mario's longtime rival, Sega's SonicTheHedgehog.
** There are also various fanmade Smash Bros. clones, then most notable example being the ''SuperSmashFlash'' series for its inclusion of more third-party characters and anime characters.
* Square-Enix's ''KingdomHearts'' series merges nearly every movie in the DisneyAnimatedCanon and some outside of it with the feel and characters of the ''FinalFantasy'' series (though, just like the ''Tsubasa'' example above, the Disney characters are alternate universe incarnations, as implicitly stated in the ''{{Tron}}'' world).
* On the PSP is ''VideoGame/DissidiaFinalFantasy'', where heroes and villains of various ''FinalFantasy'' games face off as part of the machinations of two opposing powers.
* ''Tales of the World'', Namco's set of MassiveMultiplayerCrossover games for their ''TalesSeries''. One bonus, though, is that the ''Narikiri Dungeon'' heroes' ability to dress as any ''[[TalesSeries Tales]]'' character and gain their abilities applies to bosses, too. Now add in the fact that theme music changes to whatever character or costume is in the lead of a party in battle, and you have a winning idea when a ''Tales'' fan can battle to Motoi Sakuraba's more popular themes, like Fighting of the Spirit or Decisive.
** A recent download introduces Taki and Mitsurugi from ''[[SoulSeries Soulcalibur]]'' for use as well.
** ''Tales of VS'' has recently been announced. It's a FightingGame that we have been told is going to have a total of 35 characters from 13 different ''[[TalesSeries Tales]]'' games. So far only 8 have been announced. They are: Stahn Aileron and Mighty Kongman from ''VideoGame/TalesOfDestiny'', Kratos Aurion from ''VideoGame/TalesOfSymphonia'', Richter Abend from ''VideoGame/TalesOfSymphoniaDawnOfTheNewWorld'', Luke fon Fabre and Anise Tatlin from ''VideoGame/TalesOfTheAbyss'', Shing Meteoryte from ''VideoGame/TalesOfHearts'', and Yuri Lowell from ''VideoGame/TalesOfVesperia''.
** ''VideoGame/TalesOfHearts'' itself is a borderline example. The cameo summons are somewhere between the trope and a very prominent ShoutOut.
* ''VideoGame/AstroBoyOmegaFactor'' for the GBA contains characters from many of OsamuTezuka's works. You gain levels by meeting new characters.
* ''[[FusionFall Cartoon Network: Fusion Fall]]'' is a Creator/CartoonNetwork MMORPG that combines their various original series (including ''WesternAnimation/CodenameKidsNextDoor'', ''WesternAnimation/EdEddNEddy'', ''WesternAnimation/ThePowerpuffGirls'', and ''WesternAnimation/{{Ben 10}}'', among others).
* ''[[AnotherCenturysEpisode A.C.E.: Another Century's Episode]]'' is, much like ''VideoGame/SuperRobotWars'', a massive crossover between a number of HumongousMecha series. It's an action game rather than a turn-based strategy game, though.
* ''VideoGame/MortalKombatVsDCUniverse'', where blood-thirsty kombatants and superheroes beat up each other due to a HatePlague spread by an ugly fusion of two {{Big Bad}}s.
* THQ's ''NicktoonsUnite'' series, merging various [[{{Nickelodeon}} Nicktoons]] with ''SpongeBobSquarePants'', ''WesternAnimation/DannyPhantom'' and ''TheAdventuresOfJimmyNeutron'' consistenly featuring as well as reoccuring appearances of varying frequency from ''The [[WesternAnimation/TheFairlyOddParents Fairly Odd Parents]]'', ''TakAndThePowerOfJuju'' and ''InvaderZim'' (And that's long after [[ExecutiveMeddling the last one has]] [[ScrewedByTheNetwork been killed off]], mind you). Oh, and I kid you not, [[TheRenAndStimpyShow Stimpy]] and [[RockosModernLife Rocko]] in the console version of ''Nicktoons: Attack of the Toybots'', and [[WesternAnimation/AvatarTheLastAirbender Aang]] in ''Nicktoons Nitro''. it has been sorta-followed by ''NicktoonsMLB''.
* ''[[GundamVsSeries Mobile Suit Gundam: Gundam vs. Gundam]]'' is an arcade FightingGame with a CrisisCrossover ExcusePlot that throws all thirty years of the ''Franchise/{{Gundam}}'' franchise together so characters like [[Anime/MobileSuitGundam Amuro]], [[Anime/MobileFighterGGundam Domon]], [[Anime/MobileSuitGundamWing Heero]], [[Anime/MobileSuitGundamSEED Kira]], and [[Anime/MobileSuitGundam00 Setsuna]] can beat the stuffing out of each other.
** Similarly, there is ''[[Dynasty Warriors: Gundam]]'' that has several stories focusing on different pilots teaming up into two forces because of this. Eventually, you can even have different pilots using different mecha.
* ''Dengeki Gakuen RPG: Cross of Venus'' is a NintendoDS ActionRPG that throws ''ShakuganNoShana'', ''IriyaNoSoraUFONoNatsu'', ''KinosJourney'', ''ToAruMajutsuNoIndex'', ''NogizakaHarukaNoHimitsu'', ''LightNovel/BludgeoningAngelDokurochan'', ''LightNovel/{{Toradora}}'' and ''LightNovel/AsuraCryin''' (with cameos from ''SpiceAndWolf'', ''LightNovel/{{Baccano}}!'', ''{{Inukami}}!'' and the BoogiepopSeries) together into a CrisisCrossover.
* ''DreamMixTVWorldFighters'' is a fairly bizarre crossover FightingGame featuring characters from {{Konami}}, HudsonSoft, and {{Takara}}. It's a shame it wasn't very good; where else could you pit VideoGame/{{Bomberman}}, [[VideoGame/{{Castlevania}} Simon Belmont]], [[Franchise/MetalGear Solid Snake]] and [[{{Transformers}} Optimus Prime]] against each other?
* ''MagicalBattleArena'' is a 3D flying FightingGame that pits the female mages and {{Magical Girl}}s of ''MagicalGirlLyricalNanoha'', ''Manga/CardcaptorSakura'', ''{{Slayers}}'', and ''MahoujinGuruguru'' against one another, with more series likely to be included in future {{Expansion Pack}}s.
* ''JumpSuperStars'' has characters from dozens of ''Weekly Shonen Jump'' series in a ''VideoGame/SuperSmashBros''-style battle royale.
** Similarly, ''Battle Stadium D.O.N.'' is the same, but specifically has characters from ''Manga/DragonBall'', ''OnePiece'', and ''Manga/{{Naruto}}'' (hence the D.O.N.).
* Speaking of which, Shounen Sunday and Shounen Magazine are looking to take a bite out of ''Jump Super Stars'' together with ''VideoGame/SundayVSMagazineShuuketsuChoujouDaikessen'' (Also known as ''Sunday vs. Magazine'') on the PSP.
* ''{{Quake}} III'' (and by extension, ''[[http://www.quakelive.com Quake Live]]'') included the ''VideoGame/{{Doom}}'' guy, the ''Quake'' marine, the ''Quake II'' marine and the guy from ''VideoGame/Wolfenstein3D'' (named Sarge here) among other characters as playable characters. Of course, they were all of the SilentProtagonist variety to begin with, so this didn't make a huge difference.
** The mod ''[[http://www.wireheadstudios.org/generations/ Generations Arena]]'' takes the above concept and runs with it, extending the crossover to the ''gameplay'' via five classes, each adapting the gameplay of said five games to the ''Quake III'' engine, right down to the finest details. ''Doom'''s fast-paced battles and BFG against ''Quake'''s flexible air control and powerful rocket launcher? You got it.
** And that's not even including custom skins, with which the crossovers skyrocket through the roof.
* {{MUGEN}} is a customizable 2D fighting engine that permits end users to homebrew reproductions of any other character in the entire genre, and create unique ones. Fighters already exist for every "vs" title released and almost every fighting games, and can be crossed over in unique ways.
* NipponIchi has recently released a new one in Japan with a release coming in summer 2010 to the US, VideoGame/TrinityUniverse. It's made in conjunction with Gust and Idea Factory.
** Also, {{Disgaea 3}} has characters from almost all NipponIchi Series. Including the entire cast of the earlier Disgaea games. MakaiKingdom, SoulNomad, PhantomBrave and LaPucelle
* [[http://forums.civfanatics.com/showthread.php?t=271473 This]] GameMod for Civilization IV has an [[AllMythsAreTrue All Fiction is True]] premise, allowing for a player to fight wars and build empires as several famous fictional leaders ranging from [[Literature/TheIliad Agamemnon]] to Macbeth to Rama, Dracula, [[TheMarxBrothers Rufus T. Firefly]], and [[TheWestWing Jed Bartlet]]. Wonders of the World include [[AtlasShrugged Galt's Gulch]], [[HarryPotter Hogwarts]], [[KingArthur Camelot]], and Franchise/JurassicPark, and adds Hero Units like Literature/DonQuixote, [[JourneytotheWest Sun Wukong]] and [[TheTimeMachine The Time Traveller]].
* The SquareEnix board game series ''VideoGame/ItadakiStreet'' has character crossovers of DragonQuest with either FinalFantasy or SuperMario depending on the game. Though traditionally NoExportForYou, a Western release has been announced for the {{Wii}} as ''VideoGame/FortuneStreet''.
* [[http://www.cinemassacre.com/2010/05/03/fan-games-cameo-founder-of-ljn-passes-away/ Mentioned]] by [[WebVideo/TheAngryVideoGameNerd the Nerd himself]] (well, his actor), ''VideoGame/SuperMarioBrosCrossover.''
* The fan-made ''MushroomKingdomFusion'' combines a wide variety of classic and contemporary video game characters and universes together into one game. For starters, playable characters include [[SuperMarioBros Mario and Luigi, Wario]], [[SonicTheHedgehog Sonic and Tails]], [[Franchise/TheLegendOfZelda Link]], [[VideoGame/GhostsNGoblins Arthur]], and [[VideoGame/MegaMan Roll]].
* ''IndieBrawl'', a FightingGame à la VideoGame/SuperSmashBros, but with characters from the Indie Gaming culture.
* ''VideoGame/PokerNightAtTheInventory'', a {{poker}} game involving characters from ''PennyArcade'', ''VideoGame/SamAndMaxFreelancePolice'', ''VideoGame/TeamFortress2'' and ''WebAnimation/HomestarRunner''. ''[[VideoGame/PokerNight2'' ups the ante by having GLaDOS as dealer, with [[Franchise/EvilDead Ash Williams]], [[VideoGame/TheVentureBrothers Brock Samson]], VideoGame/{{Sam|AndMaxFreelancePolice}}, and [[VideoGame/{{Borderlands}} Claptrap]] as opponents. [=GLaDOS=] and Ash especially being no stranger to crossovers by now.
** In theory, expansions or further installments could potentially include characters from just about any video game, movie, comic book, cartoon, etc. you could name (in practice, any character owned by a company too chicken to go in on a project solely on the basis that it's a cool idea can be struck from the list). 
* Any {{Wii}} game that uses Miis as playable characters or [=NPCs=] can become this if you make enough of them.
* ''PlaystationMoveHeroes'', featuring JakAndDaxter, VideoGame/RatchetAndClank, and SlyCooper ([[MyFriendsAndZoidberg and Bentley]]).
** ''VideoGame/PlayStationAllStarsBattleRoyale'' takes this concept, bolts on a whole lot more franchises, and storms ''Super Smash Bros.'''s territory with a MascotFighter.
* The ''Macross Frontier'' PSP game series allows you to play all {{Macross}} universes. The recent title, ''Macross Triangle Frontier'', covers ''MacrossZero'', ''{{Macross}}'' (as well as '' Do You Remember Love''), ''MacrossPlus'', ''{{Macross 7}}'', ''Macross Dynamite 7'', ''MacrossFrontier'' (as well as ''Macross Frontier: The False Songstress'') and ''Macross 2''.
* In a more literal example, ''{{Minecraft}}'' allows anyone to make their own character skins, which leads to 20+ characters all working together to build a house/civilisation and mine for diamonds.
* ''CartoonNetworkPunchTimeExplosion'' is a Smash Bros. clone with [[ExactlyWhatItSaysOnTheTin Cartoon Network]] characters.
* ''HeroesPhantasia'' is an upcoming RPG from [[NamcoBandai Banpresto]], featuring ''KeroroGunsou'', ''{{Slayers}}'', ''DarkerThanBlack'', ''MaiHime'', ''SorcererStabberOrphen'', ''Anime/ReadOrDie'', ''RuneSoldierLouie'', ''{{S-Cry-ed}}'', and ''[[BloodPlus Blood +]]''.
* {{Konami}}'s {{MSX}}2 Mahjong game ''Hai no Majutsushi'' featured eight mascots from various other Konami games: [[MazeOfGalious Popolon, Aphrodite]], [[AntarcticAdventure Pentarou]], [[GanbareGoemon Goemon]], [[{{Gradius}} Dr. Venom]], a VisualNovel/{{Snatcher}}, a [[EenieMeenieMinyMoai moai]], and a perverted version of [[VideoGame/{{Castlevania}} Simon Belmont]].
* NES pirate cartridge ''KartFighter'' drops the characters from ''VideoGame/SuperMarioKart'' into a fighting game, while ''World Heroes 2'' (not to be confused with the actual ''VideoGame/WorldHeroes'' games) includes [[StreetFighter Ryu, Chun Li, M. Bison]], [[FinalFight Haggar]], [[FatalFury Andy Bogard, Lawrence Blood, Mai Shiranui]], [[SuperMarioBros Mario, King Koopa]], SonicTheHedgehog, [[Franchise/TeenageMutantNinjaTurtles Leonardo]], and [[Manga/DragonBall Goku]].
** The Mega Drive bootleg Top Fighter 2000 MK VIII attempts to take this one step further, (albeit with fewer characters) with MuhammadAli, MichaelJordan, (yes, the NBA star) [[StreetFighterII Ryu]], [[Manga/DragonBall Goku]], [[TheKingOfFighters Kyo]], {{Cyclops}}, [[FatalFury Ryo and Geese Howard]] all playable characters. The title screen features the former two, while the intro sequence ([[SoBadItsGood which includes Ali punching Jordan in the face]]) implies that they were going for an UltimateShowdownOfUltimateDestiny between them.
* The ''WarriorsOrochi'' games has the characters of both DynastyWarriors and SamuraiWarriors dropped into the same setting due to the BigBad messing around with time to seek out powerful warriors to challenge him. Along for the ride are some mythical beings exclusive to the series and by the third game, [[DeadOrAlive Ayane]], [[NinjaGaiden Ryu Hayabusa]], Achilles of WarriorsLegendsOfTroy, Nemea of TrinitySoulsOfZillOll and Jeanne d'Arc of Bladestorm.
* [[http://www.nick.com/games/super-brawl.html There's also]] a {{Nicktoons}} fighter now.
* {{Widenyo}}, a very addicting and [[ForcedLevelGrinding grind-tastic]] turn-based strategy game featuring [[LoadsAndLoadsOfCharacters 156 characters]] from a multitude of {{Alicesoft}} games.
* One of the oldest examples for video games? ''VideoGame/KingsQuest''. Its FantasyKitchenSink setting was explained in ''Literature/TheKingsQuestCompanion'' by stating that Fairy Tale characters, mages, magical creatures, TheFairFolk, and gods of dying faiths literally [[AllThereInTheManual withdrew to an alternate universe to survive]]. 
* ''UniversalMonstersOnline'' does this with various UniversalHorror characters; a few had already crossed over in the films, but the game adds several more to the mix.
* Nintendo has recently announced an upcoming crossover between... ''Franchise/ShinMegamiTensei'' and ''FireEmblem''. Though most didn't see it coming, it looks like fans of both sides are already starting to love it.
* ''Namco Super Wars'' for the WonderSwan.
[[/folder]]

[[folder:Theater]]
* ''{{Seussical}}'' has characters from several of Dr. Seuss' books
[[/folder]]

[[folder:Webcomics]]
* There have been at least two webcomic Massive Multiplayer Crossovers: ''[[http://www.dragoneers.com/crossovers/index.php?comic=Greatescape The Framed!!! Great Escape]]'' and the recently ended ''CrossoverWars''
* Though it never crossed over with both at the same time, ''Webcomic/ItsWalky!'' had crossovers with both ''{{Melonpool}}'' and ''{{Fans}}!'' that established both as part of its universe (or multiverse in the latter case) and which ended up having a lasting impact on its storyline.
* ''KevinAndKell'' and ''GeneralProtectionFault'' had an arc where two GPF characters wandered into K&K's Domain world. The artists managed to work the events into ''both'' their storylines that were running at the time, and apparently drew a strip each day--both had two-strip days where the storyline advanced.
* ''Starslip Crisis: Alterverse War'' is a mashup of a large number of science fiction webcomics, and had just started as of October 2007.
* The webcomics ''Webcomic/QueenOfWands'' and ''SomethingPositive'' had [[http://www.queenofwands.net/d/20040510.html a couple]] of [[http://www.somethingpositive.net/sp05102004.shtml crossover stories]]. Later, after QOW ended its run, Kestrel [[CanonImmigrant showed up as a semi-regular]] on S*P.
** Choo-Choo Bear hired the Pet Professional from the webcomic of the same name to kill his homicidal cousin Twitchy-Hug.
** And recently Davan from S*P has been seen texting with ''GirlsWithSlingshots'' after running into her at the wedding of Jameson and Maureen.
** Choo-Choo Bear later had kittens with Sprinkles of ''Girls with Slingshots'', one of whom Davan gave to Roz of ''Webcomic/{{Shortpacked}}'', and another is by Hazel to her cousin Robyn from AllNewIssues.
*** Even better, none of those strips have been shy about crossovers of their own. QOW drags in PunchAndPie, which stars its BreakoutCharacter Angela; ''Shortpacked'', a branch of the WalkyVerse, pulls in {{Fans}} and Webcomic/{{Avalon}}.
* ''QuestionableContent'' has crossed over with ''Diesel Sweeties'', which has itself crossed over with ''ScaryGoRound''. ''QuestionableContent'' has also crossed over with ''{{Applegeeks}}'', which, having crossed over with ''CtrlAltDel'', would turn the whole group into one quasi-incestuous ball of webcomics. I'm reasonably certain that PvP has been referenced in at least one of these, probably ''Diesel Sweeties'', and since the former has crossed over with ''PennyArcade'' more than once, it's completely cross-eyed insane over there.
** And the Author of ''CtrlAltDel'' exists as a person in the ''PennyArcade'' universe, so that means, if you follow the little red thread of universal strings, that he exists in the same plane of existence as his characters..
** Don't forget that ''Applegeeks'' had a major crossover (well, on its end) with ''Webcomic/MegaTokyo'' at one point. Which chains the whole thing to a specific date, making things even crazier.
** It gets better. Questionable Content is now having background extras as characters from other comics like GirlsWithSlingshots, OctopusPie, AndersLovesMaria and {{Overcompensating}}. Since {{Overcompensating}} features the author and most people known in the webcomic industry, it means all these characters now exist in the same universe as their creators.
** The cast of Shortpacked has visited the Coffee of Doom coffee house from QC on occasion, including once when both artists did a take on the [[http://www.shortpacked.com/2009/comic/book-10/03-the-comedy-laugh/coffeehouse/ same]] [[http://www.questionablecontent.net/view.php?comic=1550 scene]]. Combine that with the S*P IntercontinuityCrossover Nexus mentioned above, along with all ''their'' respective crossovers, and we have a massive webcomic universe that could give Marvel a run for its money.
** Oh, and, ''Shortpacked'' has crossed with ''{{Multiplex}}''.
* ''Webcomic/SluggyFreelance'' hosted one of these during the [[FillerStrips Filler Arc]] "[[http://www.sluggy.com/daily.php?date=000327 Sluggy Freelance: Where Are You?]]" When all of ''Sluggy's'' [[AnimatedActors actors]] are kidnapped (a.k.a. Pete Abrams decides to take some time off) characters from several other webcomics are hired to fill in for them and/or find the kidnappers.
* Several members of the [[http://www.webcomicsinc.com/ Webcomics Inc.]] social networking site collaborated on a crossover comic, where they made all their characters teen-aged and put them into high school together. The result, [[http://www.wcihigh.com WCI High]], merged characters from [[http://www.goodtimescomic.com/ Good Times]], [[http://mikeyslife.com/ Mikey's Life]], [[http://www.webcomicsnation.com/eddurd/everydayheroes/series.php Everyday Heroes]], and [[http://www.bigsandygilmore.com/ Big Sandy Gilmore]].
* ''LeastICouldDo'' recently finished the Ultimate Final Civil War Invasion Crisis Thing, which featured the gaming webcomic characters trying to kill the slice-of-life comic characters. (''Webcomic/TheOrderOfTheStick'', meet ''Webcomic/{{xkcd}}''.)
* ''MenageA3'' and ''SoreThumbs'' crossed over at some point and are implied to be in the same universe, and ''MenageA3'' crossed over with ''SchoolBites''. If this keeps up we'll wind up with every webcomic crossing over to one another.
* The writer of ''WebComic/NoRestForTheWicked'' footnotes her comics so you can get all the fairy tales she's using characters from.
* ''FinalBlasphemy'' has characters from ''VideoGame/MegaMan'', ''FinalFantasy'', Mario, and several other gaming universes.
* ''Webcomic/TroopsOfDoom'' has GIJoe[=/=]Cobra and StarWars Empire characters, as well as other random characters and an alien race called [[{{Lego}} Legonians]].
* The ''Webcomic/LadySpectraAndSparky'' storyline "Demon War" featured guest-stars from several different 1990s-era mini-comics, including Mister Mid-Nite, Doc Saphire, Cassiopeia the Witch, and Madame Boogala.
[[/folder]]

[[folder:Web Original]]
* Although there are [[JournalRoleplay many similarly-themed RPs]], ''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.
* The Game in which ''LifeInAGame'' takes place seems to take ''all'' video games as true, with [[Franchise/TheLegendOfZelda Zelda]] appearing alongside [[{{HALO}} Master Chief]], and [[VideoGame/ChronoTrigger Frog]] serving as the hero's {{Jerkass}} Mentor.
* The Website/ThatGuyWithTheGlasses [[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.]]
---> [[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.
---> '''Everybody''': Yeah!
** 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.
** Later on when faced with Uwe Boll's ''Film/AloneInTheDark2005'', the Nostalgia Critic gave up on reviewing it. Until! [[WebVideo/TheSpoonyExperiment Spoony]] and [[WebVideo/AtopTheFourthWall Linkara]] arrived to assist him.
** And kicking off 2010, we have an epic review of DragonBallEvolution, starring Paw, [=LordKat=], Rollo T, Hopewithinchaos, and Y Ruler of Time, with guests including [[WebVideo/YuGiOhTheAbridgedSeries LittleKuriboh]], [[DragonBallAbridged MasakoX]] and WebVideo/TheHappyVideoGameNerd. This was recorded while everyone was attending [[http://en.wikipedia.org/wiki/MAGFest MAGFest]].
** The [[{{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.
** In 2011, things repeated. Y Ruler of Time used [=MAGFest=] to do another multiple reviewer crossover (''TheLastAirbender'', with WebVideo/ToddInTheShadows, WebVideo/JesuOtaku and 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).
** And once again in 2012. However, this time it was Linkara that used [=MAGFest=] for a multi-reviewer crossover (''SouthlandTales''), and Year Four had [[WebVideo/ToBoldlyFlee a mini series that's a sequel to the previous one]] and more individual crossover videos.
* How about '''''[[TropeNamer The]]''' Music/UltimateShowdownOfUltimateDestiny'' flash video? Good guys; bad guys; explosions as far as the eye can see. Way too many pop culture icons to count.
* [[http://tvtropes.org/pmwiki/posts.php?discussion=867cnxpqmkkzb2bjc06knmpe&page=1 This]] roleplay, taking place right here on our own forums. ''PrincessTutu, Manga/{{Naruto}}, Anime/{{Pokemon}}, Franchise/TheLegendOfZelda, VideoGame/NoMoreHeroes'', and ''Literature/{{Discworld}}''- and that's just for starters.
** [[TheMassiveMultiFandomRPG It has its own page now]]. Although technically I'd say it's more of a MegaCrossover.
* ''[[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 OsamuTezuka.
* TheSlenderManMythosStories tends to have the blogs mix together. For example, M of ''Blog/TheTutorial'' regularly participates in Damien's blog, ''Blog/DreamsInDarkness''.
* Tvtropes' very own AlternateRealityGame TheWallWillFall has many fictional characters entering the real world.
[[/folder]]

[[folder:Western Animation]]
* Disney owns all the characters it uses plus a whole network. The most recent example is ''HouseOfMouse'', which has Mickey and Co. as hosts of a nightclub/theater, with the characters of the feature films as the audience.
* Many classic {{Hanna-Barbera}} characters have been used across the board, in shows like ''{{Laff-A-Lympics}}'' and ''YogisGang''; this is still done, but with a more satirical bent (e.g., ''HarveyBirdmanAttorneyAtLaw'').
* Nearly all recent WarnerBros animated television series made references and overt cameos with one another.
* As stated above, the early-90s [[VerySpecialEpisode public service announcement]] ''CartoonAllStarsToTheRescue'' had characters like the ''WesternAnimation/{{Teenage Mutant Ninja Turtles|1987}}'', ''TheSmurfs'', ''[[Disney/TheManyAdventuresOfWinnieThePooh Winnie the Pooh]]'', the cast of ''WesternAnimation/{{Ducktales}}'', and many others team up to teach a single kid about the dangers of drugs [[spoiler: and save his sister]]. Although, if you can see Smurfs, there's a good chance you're tripping balls already.
* The '80s 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).
* 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/{{Blondie}}, Snuffy Smith, and ComicStrip/BeetleBailey.
* ''CaptainNTheGameMaster'' featured a mishmash of characters who appeared on the NintendoEntertainmentSystem [[InNameOnly done wrong]]. Most of the episodes took place in the neutral Videoland, with characters like [[VideoGame/{{Castlevania}} Simon Belmont]], VideoGame/MegaMan and [[strike:[[IAmNotShazam Kid Icarus]]]] [[KidIcarus Pit]] hanging around, even if InNameOnly. Link and Zelda from ''Franchise/TheLegendOfZelda'' (more accurately, from [[SuperMarioBrosSuperShow the Zelda cartoon]]) appeared too.
* The 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 ''RoaryTheRacingCar'', ''FifiAndTheFlowertots'', ''TheWombles'', ''InTheNightGarden'', ''AngelinaBallerina'', ''[[ScoobyDoo Scooby-Doo]]'', ''Bagpuss'', ''Bob the Builder'', ''WesternAnimation/{{Ben 10}}'', ''{{Thunderbirds}}'', ''PostmanPat'', ''WesternAnimation/SpongebobSquarepants'', ''FiremanSam'', ''CamberwickGreen'', and ''WesternAnimation/{{Paddington}}'' amongst others.
** [[DoingItForTheArt All singing parts of the characters by their original voice actors. The video took two years to produce, and it's for charity.]]
* Done with advertising mascots in the short film ''{{Logorama}}''. It won the 2009 Oscar for Best Animated Short.
* ''TheRoseyAndBuddyShow'', a 1992 TV special produced by {{Nelvana}}, featured not only animated versions of {{Roseanne}} and Tom Arnold, but also the CareBears, WesternAnimation/{{Beetlejuice}}, Tom&Jerry, {{Droopy}} and even WesternAnimation/{{Wile E Coyote|and the Roadrunner}}'s stunt double.
* AardmanAnimations made a Google Chrome commercial for Christmas 2012 that featured WallaceAndGromit making a conference call with [[ChickenRun Ginger]], [[CreatureComforts Captain Cuddlepuss and Trixie, the robins]], [[ShaunTheSheep Shaun's flock]], and [[WesternAnimation/AMatterOfLoafAndDeath Piella and Fluffles]].
[[/folder]]

[[folder:Other]]
* ''[[http://edenstudiosdiscussionboards.yuku.com/topic/4219/t/Heroes-and-Monsters-of-the-Millenium-1995-2005.html?page=1 Heroes and Monsters of the Milennium]]'' Is a conversion for the Unisystem RPG ruleset, mixing ''Series/BuffyTheVampireSlayer''[=/=]''Series/{{Angel}}'' with everything from ''[[Creator/MarvelComics Marvel]]'' and ''Creator/DCComics'' to ''Series/StargateSG1'', ''Franchise/{{Godzilla}}'', ''{{Ultraman}}'', ''Franchise/LyricalNanoha'', ''WesternAnimation/{{Gargoyles}}'', ''{{Negima}}'', the works of Creator/HPLovecraft, ''MazingerZ'' and many others. With considerable overlap in themes, races, and technology.
* ''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.
* Wiki/TVTropes' own Pantheon/TropePantheons. Characters from across all fiction gather together as deities, and presumably alternate between annoying each other, and fighting the villains.
* [[http://www.sowhowins.com So Who Wins]], a any character battle website which a crossover between anything can happen.
* ThisVeryWiki has one for the works of the Walt Disney Company called WMG/FriendsAndTheHighCouncil.
* The FictionalISOTMapGame series of 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.
[[/folder]]

[[folder: Real Life]]
* WorldWarII has something for everyone. ThoseWackyNazis? Check. DirtyCommunists? Double-check. The British fighting on TheHomeFront? Yup. {{Eagleland}} pulling a BigDamnHeroes moment for Europe (only after the aforementioned communists had already lost 20 million people)? Why not? And let's not forget about the NuclearOption being used in the East. Everyone got involved in the second World War -- especially states that claimed non-involvement such as Spain or Switzerland.
[[/folder]]

7th May '13 6:37:58 PM moderator Willbyr

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7th May '13 6:18:14 PM Rethkir

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7th May '13 6:15:36 PM Rethkir

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