[[quoteright:350:[[TabletopGame/{{Warhammer40000}} http://static.tvtropes.org/pmwiki/pub/images/Hello_Warhammer.jpg]]]]
[[caption-width-right:350:[[HelloKitty Suffer not the Chocobear to live!]]]]
A variety of {{crossover}} fic where the characters of one or more franchises replace the established characters in yet another franchise. Usually written for the comedic value of the resulting FishOutOfWater juxtaposition, although the odd serious/dramatic effort is seen, too.

In recent years, the term has also started to be applied to {{crossover}} fics where the metaphysics and backstories of the universes have been ''fused'' so they have always existed as part of the same setting. As a result, rather than the characters being simply swapped, the backstories and worlds of both franchises are altered so they can exist together. For example, a villain from one show might be 'revealed' to have been part of a conspiracy with similar goals from the other show, thus linking the two and leaving the protagonists likely to come into contact as they each fight against the conspiracy.

Sometimes overlaps with MetaFic, ElsewhereFic, and TransplantedCharacterFic (the latter two usually simultaneously). FilmFic is a {{subtrope}}. Compare the more typical IntercontinuityCrossover. Has no relation whatsoever to FusionDance or that nuclear stuff going on in the Sun's core or a [[Film/BackToTheFuture custom DeLorean]].

----
!!Examples:

* A {{Canon}} example would be ''Anime/RODTheTV''; which is a fusion story of ''Anime/ReadOrDie'' and ''[[http://manga.animea.net/read-or-dream.html Read Or Dream]]'', a manga set in an AlternateContinuity.
* For some reason, it was very popular in the late 1990s to replace the crew of any given [[Franchise/StarTrek Starship Enterprise]] with the cast of ''Manga/RanmaOneHalf''. Inevitably, [[NoSenseOfDirection eternally-lost wanderer]] Ryoga would be given the post of navigator/helmsman. Replacing the cast of ''Franchise/SailorMoon'' with the Ranma cast also had a brief vogue. Ranma was always cast as Sailor Moon. (Read more about this in FukuFic.)
** In fact ''Manga/RanmaOneHalf'' seemed to have a lot of Fusion Fics.
* Speaking of ''Franchise/StarTrek'', the villain of ''[[Film/StarTrekVITheUndiscoveredCountry The Undiscovered Country]]'' being a fan of Shakespeare resulted in a close relative of this trope by inspiring someone to translate ''Hamlet'' into Klingon. Apparently it worked well enough that the ''Literature/StarTrekNewFrontier'' novels suggest that the immortal bard has quite a following in the Klingon Empire.
* Perhaps epitomized by a piece of artwork entitled simply [[http://uncyclopedia.org/wiki/Image:Popeye.png "Popeye the Sailor Moon"]]. [[http://dovsherman.deviantart.com/art/Popeye-the-Sailor-Moon-171011752 There]] [[http://the-shadowed-angel.deviantart.com/art/Popeye-the-Sailor-Moon-51349544 are]] [[http://www.thecartoonpictures.com/r-popeye-200-popeye-the-sailor-moon-1275.htm lots]] of these little horrors.
* Kanius, formerly [=SSJ4Takeru=], intertwines the ''Franchise/{{Digimon}}'' and ''[[DragonBall Dragon Ball Z]]'' into a long-running successful Fusion series called Fanfic/DigimonFusionKai. It has been previously and been simply called Digimon Fusion, or 'D-Fusion' in the past. As of 2010, it has been revived and rebranded with the [[DragonballKai 'Kai']] label. It is now undergoing a revision to keep update with his other writing. It is an ambitious series and the battles scenes are deliciously well-written.
* In Angus [=MacSpon's=] ''[[http://shell.ihug.co.nz/%7Emacspon/fanfic/ The Replacement Ranmas]],'' Fusion and MetaFic mix when the entire cast of ''Manga/RanmaOneHalf'' turns up missing on the first day of shooting for a new fic, and the "director" must scramble to replace them with characters from ''other'' anime series...
* A rare ''commercial'' variant of this would be the "ComicBook/AmalgamUniverse" jointly created by Marvel and DC, in which their two 'verses and their inhabitants were merged in a literal fusion; unlike a classic fic fusion, though, it was not so much a case of "character X takes on the role of character Y", but "Character X + Character Y -> [[CompositeCharacter Character Z]], who partakes of both". For example Doctor Doom and Doomsday combine to form ''Doctor Doomsday''.
** The two major mixes. Batman + Wolverine = Dark Claw and Captain America + Superman = Super-Solider.
** Some characters were even fused twice. In addition to Dark Claw, there was Bruce Wayne, Agent of Shield (Bruce Wayne/Batman + Nick Fury). And Wonder Woman became both Amazon (Storm + Wonder Woman) and Diana Prince (Wonder Woman + someone who would marry Punisher and fight crime with him).
* [[ImageBoards 4chan]] tends to result in a lot of these:
** ''[[http://plus4chan.org/boards/coc/res/253.html Fear and Loathing in Ba Sing Se]]''. Yes, ''[[WesternAnimation/AvatarTheLastAirbender Avatar]]'' and ''FearAndLoathingInLasVegas''.
** Another one is ''Avatar'' and ''Franchise/{{Batman}}'', with Sokka as "Wolfbatman", and provides some truly horrifying fanart of post-VillainousBreakdown Azula as the Joker from ''Film/TheDarkKnight''.
** Then there's the SuperRobot one that has Aang piloting [[GurrenLagann Gurrang Lagann]] and [[GetterRobo Getter Momo]] with Sokka in the [[GaoGaiGar Wang Fightgar]].
** Every other topic [[http://plus4chan.org/boards/a on /a/+]] is an AlternateUniverse, and plenty are bound to be fusion.
* There is a ''PiratesOfTheCaribbean'' crossed with ''CareBears''. [[https://www.fanfiction.net/s/3157027/1/Rum-and-Mint-Jelly]]
* ''Anime/NeonGenesisEvangelion'' had the intro redone with characters from ''LightNovel/MariaSamaGaMiteru'' as seen [[http://ca.youtube.com/watch?v=EghJBGRIYn8 here]]. ''Evangelion'' gets quite a lot of these if you bother to look, in fact.
* ''[[http://www.thekeep.org/~rpm/eva/ Children of an Elder God]]'' is ''Evangelion'' with the pseudo-Christian stuff replaced with Creator/HPLovecraft, right down to Misato wearing an elder sign instead of a cross. There's also ''FanFic/AeonNatumEngel''[=/=]''FanFic/AeonEntelechyEvangelion'', which places the characters and plot of ''Evangelion'' into the ''TabletopGame/CthulhuTech'' setting. Not too big of a stretch, since [=CTech=] was partially based on Eva in the first place. Then it throws in ''[[VideoGame/FirstEncounterAssaultRecon F.E.A.R.]]'', and it ''still'' fits.
* The Batman was fused with ''WesternAnimation/KimPossible'' and Classic Cowboy makes it work beautifully. These stories are quite good.
* ''WesternAnimation/Ben10UltimateAlien'' and ''{{Hellsing}}'' have been fused. Guess who Kevin is everybody!
* In the Swedish gaming mag ''Sinkadus,'' waaaay back, RPG writer Anders Blixt wrote a short story fusing ''Film/StarWars'' and ''Film/TheLordOfTheRings,'' entitled (in English translation) "Lord of the Rings part IV: A New Hope". It featured Obi-Wan Gandalf and Aragorn Solo leading a bunch of Jawas down into Mordor, eventually encountering "Darth Angmar, the right hand of Emperor Sauron himself!" Who is the daddy of one of the Jawas...
* The game ''{{Pokethulhu}},'' an AffectionateParody of both ''Pokémon'' and the Franchise/CthulhuMythos, has as its central conceit that there actually is a ''Pokethulhu'' cartoon series. In it, the characters are fusions of Pokémon characters and fictional or ''real'' people associated with the mythos: the main character is Ash Ketchum/author avatar Randolph Carter, while Team Rocket is Team Eibon, made up of Derleth (named after author/editor/[[FanHater fan hate]] object AugustDerleth) and Bloch (named after author RobertBloch).
* The fanfic ''{{Avenging}}'' fuses manga in general and ''Ranma 1/2'' in particular with Marvel Comics in general and the Mighty Avengers in particular; the Avengers in this universe are based in Tokyo and made up of characters from the Ranma comics. Ranma is both Captain Japan and his spunky female sidekick, Bucky (never seen at the same place at the same time, which Bucky explains by their only having ''one'' indestructible shield between them); Akane is Thor (presumably because they both pick hammers out of empty air...); Ukyo is Hawkeye (who claims to be a man in her superhero identity but is unable to conceal her attraction to Captain Japan); Dr. Tofu and Kasumi are Giant-Man and the Wasp for no reason whatsoever; Ryoga is the Hulk (he stumbled onto the testing grounds of the Gamma Bomb when being lost as usual; there is also a giant green rampaging boar which people don't know is also Ryoga...); and Mousse is Daredevil (not normally an Avenger, but the writer couldn't resist the joke, also making Electra = Shampoo and Stick = Cologne...). The writing is less funny than it sounds, the main attraction being trying to figure out who is going to be who, so to speak.
* ''TheWheelOfTime'' and ''Franchise/{{Transformers}}'' have had their characters fused by RuleOfFunny into ''{{Trans-WoT-ers}}'', resulting in transforming Asha'bots, Darkfriendicons, and Egwene al'Bumblebitch, with some random lesbianism thrown in.
* Creator/MercedesLackey wrote the short story "MovingTargets", which is a fusion of [[Literature/HeraldsOfValdemar Valdemar]] and, oddly, ''Franchise/ScoobyDoo.'' It has four Herald trainees and a kyree in a green flower-painted wagon solving a ScoobyDooHoax. It even includes the line "And I would have gotten away with it, too, if it hadn't been for you meddling Heralds."
* There are pages depicting a fusion between ''VideoGame/{{Persona 4}}'' and ''{{Yotsubato}},'' with [[TheCutie Nanako]] taking [[CheerfulChild Yotsuba's]] place. It was about as adorable as you'd expect.
* Unsurprisingly, there's a ''SoulEater''[=/=]''Manga/{{Naruto}}'' fusion fic out there. The fic in question is [[http://www.fanfiction.net/s/4670796/1/Master_and_Weapon Master and Weapon]]. Despite what you'd expect, the Black*Star substitute isn't Naruto.
* The FanFic ''FanFic/MartianManhunter'' is an interesting case. No characters are replaced; rather, VeronicaMars, along with her backstory and supporting cast, are shoehorned into the background of ''Series/BuffyTheVampireSlayer'''s Sunnydale... [[spoiler:The twist is she still has all her Neptune memories, including who killed Lily, and the entire series of ''Buffy The Vampire Slayer,'' which to her was, until a certain point, entirely fictional. And there's a valid explanation for this, if you read far enough in.]]
* ''[[http://www.cloudnet.com/~dietzt/hamlet.htm Hamlet]]'' played by ''{{Slayers}}'' characters anyone? Too bad it's a DeadFic.
* Another rather odd variation was a ''Manga/RanmaOneHalf'' + ''Franchise/StarWars'' fusion where, while the Nerima Wrecking Crew were all cast into roles ''similar'' to the characters in ''A New Hope'', they didn't replace them at all! They just happened to have similar adventures before, alongside, and occasionally intersecting them. For example, Kasumi (Luke's neighbor) and Nodoka (Obi-Wan's Ex-wife) getting on the Death Star by ''requesting a tour'', and in the process get their pictures taken with two stormtroopers (one a little short) escorting their Wookiee "prisoner". Sadly, it died before they could get to ''The Empire Strikes Back''.
** A straighter example of the same combination can be seen in Blade and Epsilon's ''[[http://www.bladeandepsilon.com/ranwars.htm Ran Wars]]''.
* Almost ''everything'' in the "Cartoon Crossover" section of [=Fanfiction.net=] is a FusionFic. I believe they call them "parodies".
* There was once a very detailed ''Ranma'' and ''Naruto'' fusion summary, leaving a very large portion of both continuities intact. The author wouldn't use it because of the latter manga's obscene length.
* There is a FusionFic for ''{{X1999}}'' and ''Manga/{{Chobits}}''. It ''was'' surprisingly well-written and well-handled.
** ... ''TsubasaReservoirChronicle''?
* Quite a few people have read the script of the [[Literature/TheLordOfTheRings Ring]] [[Franchise/StarWars Wars]] Trilogy (''The Fellowship of the Hope'', ''The Two Towers Strike Back'', and ''The Return of the Jedi King''). Featuring occasional appearances by Monty Python.
* ''Webcomic/HelloCthulhu''. Yes, it's [[Franchise/CthulhuMythos Cthulhu and Co]] in HelloKitty '{{verse}}.
* ''Teknomorphs'' is, as you might have guessed from the title, a blending of the '{{verse}} of Literature/{{Animorphs}} with that of [[Anime/TekkamanBlade Teknoman]]. Although it differs in that the Animorphs gain two new members rather than being replaced.
* ''FallingStars'' dumps ''Manga/LuckyStar'' characters into the ''VideoGame/{{Fallout}}'' universe circa ''VideoGame/{{Fallout 3}}''.
* ''[[http://www.youtube.com/watch?v=4_PvyA45S_k Babylon Park]]'' is set aboard the Series/BabylonFive space station, populated by WesternAnimation/SouthPark-style versions of the characters.
-->"By G'Quan, they've killed Kosh!"\\
"You bastards!"
::And don't forget
-->"Do you want the cheesy spoo?"
* One of ''Manga/BlackLagoon'''s parody covers features Revy and Balalaika [[http://danbooru.donmai.us/post/show/148472/2girls-balalaika-black_lagoon-highres-parody-revy- in a Mari-mite-like setting.]]
* RPG.net gives us lots of crossovers: [[http://wiki.rpg.net/index.php/File:MPost13020-motivatorTriCalvin%2Ejpg One version of]] [[Manga/{{Trigun}} Tri]][[ComicStrip/CalvinAndHobbes Calvin]], [[http://wiki.rpg.net/index.php/File:MPost13160-cross2%2Ejpg Kingdom Karts]]. TabletopGame/{{Warhammer 40000}} tends to be mixed more often than others, so there are [[http://wiki.rpg.net/index.php/File:MPost462-152378139_1d8d63594a_o%2Ejpg Warhammer 40chibi]], [[http://wiki.rpg.net/index.php/File:MPost4244-motivator1377526vc8%2Ejpg three-in-one]] "[[TabletopGame/{{Warhammer 40000}} In the grim future]] of [[HelloKitty Hello]] [[Franchise/StarWars Vader]]..." and even a [[http://wiki.rpg.net/index.php/File:MPost11381-MrSethWH3%2Ejpg picture]] of [[EverythingsBetterWithPenguins Tux]] in [[TabletopGame/{{Warhammer 40000}} WH40K]] + ''BunniesAndBurrows'' + ''TabletopGame/BigEyesSmallMouth'' and "[[http://1d4chan.org/wiki/File:Pony_Cultist.png My Little Heretic]]" [[WesternAnimation/MyLittlePonyFriendshipIsMagic pony]]. But [[http://wiki.rpg.net/index.php/File:MPost20339-06f4ee4e95%2Ejpg In the grim future]] of HelloKitty there is only [[TabletopGame/CallOfCthulhu SAN loss]].
* There is a Manga/DeathNote doujinshi which parodies OnegaiMyMelody. It's called (obviously) Onegai! Near Mellody (yes, Near plays Kuromi and Mello plays My Melody).
* [[http://www.drunkduck.com/supahnariobros/ Supah Nario Bros]] is ''Manga/{{Naruto}}'' if all the characters were mixed with Franchise/SuperMarioBros characters (Naruto becomes [[IdiotHero Nario]], Sasuke becomes [[DistressedDamsel Princess Toadsuke]], Lee becomes [[ButtMonkey Leegi]] and so on).
* [[http://the-first-magelord.deviantart.com/art/Combined-Ahsoka-and-Doctor-119036424 What really happened to...]] [[WesternAnimation/StarWarsTheCloneWars ...Ahsoka Tano before order 66.]]Those poor [[Series/DoctorWho Daleks]]...
* [[http://en.touhouwiki.net/wiki/One_Night_Stand Advent Cirno]], by the {{doujin}} circle One Night Stand, is an ongoing VideoGame/{{Touhou}} take on ''VideoGame/FinalFantasyVII'', with everybody's favorite Baka standing in for Cloud and fighting monsters alongside a Nakama composed of Hong Meiling, and Reisen and Tewi Inaba, along with some other familiar Touhou faces.
** There's also [[http://en.touhouwiki.net/wiki/Wi-Z_GARAGE 30 by Wi-Z GARAGE]], which takes the plot of ''Mountain of Faith'' and combines it with ''Film/ThreeHundred'', with awesome results.
* Obscure doujinshi series ''Mythic Quest'' has a whole non-canonical edition crossing over with ''[[Franchise/DotHack .hack]]'', which involves Anaya as Emma Weilant and John as Harald Hoerwick, along with other omakes of Balmung as their son and ''Franchise/DotHack''s Aura as their daughter. (What with them having a canonical AI-daughter, it's not a hard stretch to make. Her also being named Aura means the author just wasn't trying.)
* ''WebComic/{{xkcd}}'' has [[http://xkcd.com/370/ these]] [[http://xkcd.com/618/ two]] (see the AltText). And [[http://xkcd.com/375/ this]].
* ''Webcomic/ElGoonishShive'' [[http://www.egscomics.com/?date=2011-07-14 Q&A #5]] has Series/DoctorWho-[[Literature/SherlockHolmes lmes]] (''[[foldercontrol]]

[[folder: EXTRAPOLATE! ]]
'')
* The ''Anime/{{Pokemon}}'' fanfic ''FanFic/BraveNewWorld'' is basically Characters from the anime in a DarkerAndEdgier version of the ''VideoGame/PokemonMysteryDungeon'' world (with a dash of ''{{Redwall}}'') starring in a DarkerAndEdgier version of ''VideoGame/PaperMarioTheThousandYearDoor''.
* ''[[http://www.fanfiction.net/s/4555560/1/ The Legend of Eevee: Pokéflute of Time]]'' is exactly what it sounds like: ''[[VideoGame/TheLegendOfZeldaOcarinaOfTime Ocarina of Time]]'' with Pokémon. And copious amounts of RuleOfFunny.
* There was a [[DarkFic rather terrifying and dark doujinshi]] based around fusing the concepts of ''Manga/AzumangaDaioh'' and ''DriftingClassroom''. The results (rape, trauma, [[spoiler: Osaka becoming a serial killer]]) made for a disturbing, yet oddly compelling read.
* The crossover fanfic ''[[http://www.fanfiction.net/s/6117857/1/A_Dark_Knight_Over_Sin_City A Dark Knight Over Sin City]]'' explores the concept of Franchise/{{Batman}} and his rogues in SinCity.
* ''Fanfic/JustAnUnorthodoxThief'' is a LightNovel/FateZero and ''Franchise/LupinIII'' Fusion Fic. Lupin the Third in this fic was a well-known thief in the [[CrapsackWorld Nasuverse]] and all his exploits are well known and documented. He also stole several historical artifacts for Mages hoping to get into the Holy Grail War, including Hassan's mask. Thus leading to him being summoned as the Servant Assassin by Kirei.
* ''Fanfic/{{Renegade}}'' takes the ''Franchise/MassEffect'' setting and replaces Systems Alliance Earth with [[CommandAndConquerTiberium Tiberium Earth]]. Changes ''abound'', with a heavily militarized humanity who doesn't align with the Citadel, the Brotherhood of Nod operating in the background, and apparently [[spoiler: Garrus being a Spectre, Nihlus surviving Eden Prime, and Kaidan as a Tiberium mutant.]]
** This has actually become a somewhat popular theme to do in Mass Effect fandom: how would another faction, such as the UNSC from {{Halo}}, or the [[Series/StarTrekTheNextGeneration United Federation Of Planets]] handle being put into the place of the Systems Alliance?
** In the case of [[{{Halo}} the former]], there's ''Fanfic/TheLastSpartan'', in which Master Chief is thawed out 131 years after the events of Halo 3 to find the UNSC has been renamed the System Alliance due to a serious reorganization overhaul and has thus joined the Citadel. The lynchpin of this canon fusion is The Chief functionally filling the role of Commander Shepard.
* The [[http://www.fanfiction.net/s/5276092/1/Elementary_My_Dear_Natsuki "Elementary, My Dear Natsuki"]] series has ''MaiHime'' characters taking the place of Franchise/SherlockHolmes regulars.
* ''Webcomic/HeadTrip'' presents: [[http://headtrip.keenspot.com/d/20060724.html Broke-batman-tain]].
* ''Fanfic/StrategicCyborgEvangelion'' is essentially ''Anime/NeonGenesisEvangelion'' in the ''VideoGame/HalfLife'' setting with copious amounts of the RealRobotGenre thrown into the mix.
* [=JohnSu=] on deviantART [[http://johnsu.deviantart.com/art/Desu-Note-56788849 gave us]] ''[[RozenMaiden Desu]] [[Manga/DeathNote Note]]''.
* This is rather popular with the ''{{Homestuck}}'' fandom, given the nature of [[TheGamePlaysYou its primary plot element]].
* [[http://www.youtube.com/watch?v=w-zbBrFJmfk This video]] will probably spawn one or two fanfics mixing ASpaceOdyssey and {{Vocaloid}}, if it hasn't done so already.
* ''HijinksEnsue'' came up with "[[CareBears Care Ewoks]] vs. [[Franchise/StarWars Death Star]]" theory as the [[http://hijinksensue.com/2009/07/06/a-well-reasoned-argument/ answer]] to NoEndorHolocaust debates.
* ''Literature/{{Pinocchio}}, Vampire Slayer''.
** See also the [[http://www.unshelved.com/2011-4-8 comment]] on ''{{Unshelved}}''.
* Fics that involve the concept of daemons from ''HisDarkMaterials'' translated into other continuities are [[http://kink-finders.dreamwidth.org/23383.html surprisingly common]].
* [[http://suptg.thisisnotatrueending.com/archive/12936417/#12942674 This]] -- "basically, [[{{Terminator}} Skynet]] meets TheBraveLittleToaster."
* [[http://www.fanfiction.net/s/6615627/1/Feli_summons_bPainis_b_bCupcake_b Feli]] Summons PainisCupcake.
** Also [[http://www.youtube.com/watch?v=HjGrHBpfqCo Law Abiding Engineer]]
* ''Fanfic/FalloutEquestria'' presents an alternate future of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' mixed with ''VideoGame/{{Fallout}}'', with a bit of ''[[Literature/NineteenEightyFour 1984]]'' thrown in for good measure.
** There's also:
** [[http://www.equestriadaily.com/2011/06/story-world-of-ponycraft.html World of Ponycraft]]''
** [[http://www.equestriadaily.com/2011/06/story-pony-age-origins.html Pony Age: Origins]]
** [[http://www.equestriadaily.com/2011/06/story-silent-ponyville.html Silent Ponyville]]
** [[http://www.equestriadaily.com/2011/05/story-pony-effect_23.html Pony Effect]]
** ''FanFic/TheGodEmpressOfPonykind''
** [[http://www.equestriadaily.com/2011/05/story-luna-heresy.html The Luna Heresy]]
** ''Fanfic/FriendsOfASolarEmpire''...
** [[http://www.fanfiction.net/s/7690121/1/PoNiOh_The_Abridged_Series Po-Ni-Oh! The Abridged Series]]
** ''FanFic/DeathNoteEquestria''
** [[http://www.fimfiction.net/story/2442/my-little-chrono-triggers-are-magic My Little Chrono Triggers Are Magic]]
** ''FanFic/AceCombatTheEquestrianWar''
** ''Fanfic/DeusExEquineRevolution''
** ''[[Fanfic/TheLastHumanATaleOfThePreClassicalEra The Last Human: A Tale of the Pre-Classical Era]]''
* This is pretty common in ''{{Guyver}}'' fanfics. Which amounts to "_____ becomes The Guyver." There have been fan fics where the likes of [[Anime/NeonGenesisEvangelion Misato Katsuragi]], [[ElfenLied Lucy]], and yes, Ranma, have become hosts to The Guyver unit.
* ''Film/SuckerPunch'' cast with human versions of ''WesternAnimation/ThePenguinsOfMadagascar'': [[http://www.fanfiction.net/s/7313135/1/Omega_Boom Omega Boom]].
* ''{{Sinfest}}'' proposes three [[http://www.sinfest.net/archive_page.php?comicID=42 slasher comics]] (as in, SlasherMovie + Comic, not slashfic).
* ''NerfNow'' had ''VideoGame/TeamFortress2'' + ''Pokémon'' arc, the one [[http://www.nerfnow.com/comic/489 about Blue Engie's niece]]. "P.S.: Don't let her have a pet."
* ''FanFic/DecksFallEveryoneDies'' has the characters of WebVideo/YuGiOhTheAbridgedSeries in the general plot from MoulinRouge.
* ''Literature/MiniMythos'' by Creator/KennethHite, a series of books that fuse the Franchise/CthulhuMythos with popular kiddies' picture books. ''[[Literature/WhereTheWildThingsAre Where the]] [[Literature/TheShadowOverInnsmouth Deep Ones]] [[Literature/WhereTheWildThingsAre Are]]'', ''[[Literature/ThePolarExpress The]] [[Literature/AtTheMountainsOfMadness Antarctic]] [[Literature/ThePolarExpress Express]]'', and ''[[Literature/CliffordTheBigRedDog Clifford the Big Red]] [[Literature/TheDunwichHorror God]]''.
* ''[[http://www.fanfiction.net/s/7804624/1/Anzais_School_for_Gifted_Basketball_Players Anzai's School for Gifted Basketball Players]]'': So what would happen if all Slam Dunk characters were mutants and joined their respective sides? [[spoiler:They'd still play basketball.]] This apears to be either a tongue-in-cheek parody of this genre, or perhaps simply just a CrackFic. Nonetheless, the characterizations are actually quite spot on while managing to incorporate each mutant's quirks.
* An official one: the DC {{Elseworld}}s tale ''SupermansMetropolis''. Superman and his supporting cast in the setting of ''Film/{{Metropolis}}''.
* [[http://archiveofourown.org/works/245025?view_full_work=true "It's Five By Five"]] is a crossover of ''VideoGame/DragonAgeII'' with ''Series/{{Angel}}''. It features Anders/[[SuperpoweredEvilSide Vengeance]] as Angel/[[SuperpoweredEvilSide Angelus]], Sebastian as Holtz, Female!Hawke as Buffy, Alistair as the Mayor of Sunnydale (for some inexplicable reason), Carver as a vampire...
* [[http://www.fanfiction.net/s/7504312/1/Lantern_Prime Lantern Prime]] has [[{{Transformers}} Optimus Prime]] as the indirect source of the [[GreenLantern Manhunter robots and the first Green Lantern]].
* An interesting example is ''[[http://www.fanfiction.net/s/2782954/1/Coming_Foward Coming Forward]]'', a ''PaperMarioTheThousandYearDoor'' fic by krisetchers. The author got a few chapters in when he realized, [[StrangeMindsThinkAlike purely by coincidence]], that his fic had the exact same plot as ''FinalDestination''. He decided that the only proper thing to do was to retroactively make it a FusionFic, even though the fic is in fact a sequel to another fic which has nothing to do with ''Final Destination''. Unfortunately, this means that [[WhatHappenedToTheMouse some really early plot points are forgotten and never mentioned again]].
* There is an adaptation of the BodyHorror movie ''Film/TheThing1982'' with the characters of the [[StopMotion Claymation]] childrens show ''{{Pingu}}''. [[http://www.youtube.com/watch?v=OPPxI_qEzsI It is as insane and hilarious as it sounds.]]
* There's the ''ComicBook/TheAvengers'' fic ''The Snow Queen'' By [[http://elspethdixon.livejournal.com/ Elspethdixon]], which has seven chapters: [[http://elspethdixon.livejournal.com/177681.html#cutid1 A mirror of steel]], [[http://elspethdixon.livejournal.com/177681.html#cutid2 A Soldier and a Smith]], [[http://elspethdixon.livejournal.com/177997.html#cutid1 Of the Library At the Young Woman's Who Understood Witchcraft]], [[http://elspethdixon.livejournal.com/178197.html#cutid1 The Prince and the Princess]], [[http://elspethdixon.livejournal.com/178518.html#cutid1 The Little Robber Boy]], [[http://elspethdixon.livejournal.com/179369.html#cutid1 The Far North, and Who the Soldier Met There]], and [[http://elspethdixon.livejournal.com/181567.html Of the Metal Woman's Palace and What Happened Afterward]]. It's basically the Hans Christian Anderson story told with CaptainAmerica as Gerda, IronMan as Kay, and various Avengers, Avengers villains, and other superheroes as all the supporting characters (several of whom don't appear in the original story, but fit perfectly into the original story's various settings). It's written in a very authentic, fairy-tale-ish style similar to Anderson's, and it's actually quite a serious and angsty story, even though it's crammed full of delightful in-jokes, and Avengers fans will take great delight in recognizing which Marvel characters the usually vaguely described and nameless or ambiguously-named supporting characters are supposed to be (hint: the great number of insect- and animal-based codenames given to Marvel superheroes fits this story ''very'' well).
* ''VideoGame/PonyFantasyVI'' is a playable romhack of ''VideoGame/FinalFantasyVI'' [[RecycledInSpace with the cast of]] ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' replacing the game's heroes.
** ''Pony Poki Panic'' is a romhack of ''VideoGame/SuperMarioBros2'' (yes, [=SMB2=], not ''VideoGame/DokiDokiPanic'', despite the name) with ponies slapped into it. So for instance, Mario is Twilight Sparkle and Princess Peach is Princess Luna. [[spoiler:Which makes it even more funny when you consider who Wart is now.]]
** ''Super Fluttershy Land 2''. ExactlyWhatItSaysOnTheTin.
** There's also ''Ponies, Please'' which does the same sprite reskin shtick to ''VideoGame/PapersPlease''.
* [[http://kaction.com/badfanfiction/ The Terrible Crossover Fan Fiction Generator]] provides many ludicrous possibilities.
-->''Your challenge is to write crossover fanfiction combining Lizzie [=McGuire=] and Around the World in 80 Days. The story should use losing one's virginity as a plot device!''
* There's at least one fanfic out there that replaces the entire cast of ''Manga/AiYoriAoshi'' with ''Manga/{{Naruto}}'' characters.
* The fanart by Kate Kryllion -- "[[http://kate-kyrillion.deviantart.com/art/Unmentionables-Assemble-299919392 Unmentionables Assemble]]" [[Literature/{{Discworld}} Ankh-Morpork City Watch]] + ''Film/TheAvengers''; and [[http://kate-kyrillion.deviantart.com/art/Tortallans-Assemble-305603092 Tortallans Assemble]] -- ''Literature/TortallUniverse'' + ''Film/TheAvengers''.
* The MarvelComics miniseries ''ComicBook/{{X-Men}} Fairy Tales'', ''SpiderMan Fairy Tales'' and ''[[Comicbook/TheAvengers Avengers]] Fairy Tales'' are sometimes this and sometimes InTheStyleOf, depending on whether they're about casting the Marvel characters in an existing story (Cyclops as Momotarō! Spidey as Anansi! Captain America as Peter Pan!) or retelling a Marvel Universe story in a fairy tale manner.
* ''How Super Mario Should Have Ended'' from WebAnimation/HowItShouldHaveEnded.
-->'''Mario''': (slams his head into Companion Cube repeatedly)
-->'''[=GLaDOS=]''': No. Stop. That's not how you use that.
* ''Franchise/TeenageMutantNinjaTurtles'' x ''VideoGame/DwarfFortress''. Just one couplet -- "[[http://www.bay12forums.com/smf/index.php?topic=91220.msg2540171#msg2540171 Teenage Bearded Axelord Turtles...]]"
* Ladies and gentlemen, [[http://www.youtube.com/watch?annotation_id=annotation_491143&feature=iv&src_vid=aNvqtKv1bPo&v=Js06g18nkc4 this]] ''{{Evangelion}}'' AMV starring ''Franchise/YuGiOh'' characters. [[note]]Or is it a ''Franchise/YuGiOh'' AMV set to ''Eva'''s theme song?[[/note]] It actually works surprisingly well.
* First there was Sonichu, a fusion of Sonic the Hedgehog and Pokemon; then there was Asperchu, a fusion of Sonichu and its creator, as well as anything else the artist decides to throw in.
* Creator/{{Disney}}'s ''Disney/{{Tangled}}'' fused with ''[[Disney/TheHunchbackOfNotreDame The Hunchback of Notre Dame]]'' and made [[FanFic/HeavensLight Heaven's]] [[http://www.fanfiction.net/s/6945240/1/Heaven-s-Light Light]] and ''Disney/{{Tangled}}'' fused with ''Film/ThePrincessBride'' made [[FanFic/TheTangledPrincessBride The Tangled]] [[http://www.fanfiction.net/s/7625566/1/The-Tangled-Princess-Bride Princess Bride]]
* The ''Storytime!'' subsubseries of ''Fanfic/ThisTimeRound'' fic, in which ''Series/DoctorWho'' characters find themselves unwillingly taking roles in fairy tales or classic literature for the entertainment of the [[SpinOffBabies Doctor Who Babies]] at the Look Who's Talking daycare centre.
* Some characters from other works replace a few of the characters in the original ''Manga/JoJosBizarreAdventure'' {{canon}} in ''WebVideo/VaguelyRecallingJoJo''.
** Magician's Red is replaced [[VideoGame/PokemonRubyAndSapphire Blaziken]] and GEB happens to be its weakness because GEB is a Water-type.
** [[Manga/{{Negima}} Negi Springfield]] replaced Ebony Devil.
** [[Manga/ArakawaUnderTheBridge Hoshi]] is the mugger who gets to be on the receiving end of Rubber Soul's coconut backbreaker.
** [[VideoGame/GuiltyGear Bridget]] replaces Nena and Roger the Teddy Bear is his stand, Empress.
** Captain Falcon replaces ZZ and compliments Kakyoin for doing a Boost Fire with a modern car.
** Blossom replaces High Priestess and she effortlessly beats up Jotaro's group, at first.
** [[http://static.tvtropes.org/pmwiki/pub/images/mariah_and_bastet_273.png Bast]] is replaced with [[VideoGame/BlazBlue Taokaka]].
** Khnum is now [[Series/KamenRider Oingo's belt buckle]], and to use its powers, [[ByThePowerOfGrayskull Oingo yells a transformation phase]].
** Makoto Shishio replaces Chaka.
* ''VideoGame/TheHalloweenHack'' replaces Ness with the protagonist of ''VideoGame/{{Brandish}}'', Varik. In-universe, some people even think Varik is Ness.
* ''Fanfic/TailsOfTheOldRepublic'' inserts [[BadassBookworm Miles "Tails" Prower]] from the Franchise/SonicTheHedgehog franchise into the Franchise/StarWars videogame VideoGame/KnightsOfTheOldRepublic and puts special attention on detail and characterization.
* The ''FanFic/CodeMarsTrilogy'', with the [[Anime/SailorMoon Sailor Scouts]] getting involved in the ''Anime/CodeGeass'' storyline.
* In ''Fanfic/TheResoluteSword'', the Franchise/{{Pokemon}} Keldeo, as well as others, are established as ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' characters (meaning that Keldeo is a unicorn from the show and has unicorn powers).
* A somewhat popular FandomSpecificPlot for VisualNovel/FateStayNight is that "Shirou was [another series' character] before the Fuyuki fire". A good example of this is FanFic/FateReachOut where this plot is used to replace [[VideoGame/{{Persona 4}} Yu Narukami]] with Shirou.
* [[http://www.youtube.com/playlist?list=PL11AA82F69350B6EA There is a]] LetsPlay of ''VideoGame/SuperMarioRPG'' that assigns each character the voice of someone from ''WesternAnimation/FamilyGuy''. It was [[DeadFic eventually abandoned]]. [[note]]The main reason it was abandoned, for those interested: the creator had a ton of issues with YouTube's copyright system and how it treated the claims that Fox seemed to have with the series. A few episodes had given him copyright strikes on a few occasions because of this, which lowered his interest to continue.[[/note]]
* ''Fanfic/MagicalPonyLyricalTwilight'' is a fusion fic of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' and ''Anime/MagicalGirlLyricalNanoha'' which asked the question of "What if the Jewel Seeds landed elsewhere other than Earth?" In this case, the entire Jewel Seed crisis would end differently and less traumatically. Later additions would put the citizens of Ponyville through ''A's'' and ''[=StrikerS=]''
* ''FanFic/{{Fellowship}}'' is a FusionFic between ''VideoGame/ChronoCross'' and ''Anime/DigimonTamers''. Also overlaps with TransplantedCharacterFic because the plot of Digimon Tamers is altered at some points to simplify some concepts and give the Chrono Cross characters BackStory without going against Chrono Cross canon (mostly).
* In ''Fanfic/NecessaryToWin'', various ''{{Manga/Saki}}'' characters attend the ''Anime/GirlsUndPanzer'' schools. For example, the main characters at Oarai Academy have two additional teams- one consisting of the Saki characters from Kiyosumi, and the other consisting of those from Tsuruga. Various characters from each series contrast with each other, such as Maho and Teru's relationships with their respective younger sisters.
* FanFic/JusticeSocietyOfJapan is a fusion of a number of Anime and Video Game settings (including Anime/GurrenLagann, Series/KingdomHearts, Anime/CodeGeass, VisualNovel/FateStayNight, VideoGame/FinalFantasyXIII, Anime/PuellaMagiMadokaMagica and Anime/NeonGenesisEvangeion) with the DCU. Elements from all of these series coexist simultaneously, and while some aspects of the setting [[InSpiteOfANail are very similar to canon]], other elements (such as Shirley being a metahuman with technopathic powers) are added to tie the settings togeather.