History CrossOver / FanWorks

* ''Fanfic/{{Avalon}}'' is a cross between mainly ''Anime/NeonGenesisEvangelion'' and the ''Franchise/MarvelCinematicUniverse'' as the forefront, but with other Marvel properties also being mentioned as well as references to other fictional settings existing within the story. So far ''Manga/RosarioPlusVampire'' and the Franchise/{{Stargateverse}} have explicitly been mentioned as part of the shared universe.

* ''Fanfic/SeVisPacemParaBellum'' is a FusionFic crossover between ''Literature/TheLordOfTheRings''[=/=]''Series/TheLordOfTheRingsTheRingsOfPower'' and the Franchise/JohnWick, reimagining characters like Galadriel, Halbrand/Sauron and other ''Lord of the Rings'' characters as part of underworld of assassins and criminals from New York.

* ''Fanfic/SeVisPacemParaBellum'' is a FusionFic crossover between ''Literature/TheLordOfTheRings''[=/=]''Series/TheLordOfTheRingsTheRingsOfPower'' and the Franchise/JohnWick, reimagining characters like Galadriel, Halbrand/Sauron and other ''Lord of the Rings'' characters as part of underworld of assassins and criminals from New York.

* ''Fanfic/SuicidalOverconfidence'': Bitsy Brandenham, the [[JustForPun central]] antagonist of ''WesternAnimation/CentralPark'', sets up a meeting with [[Franchise/MarvelUniverse the Kingpin]] after her deal to buy Central Park goes south. It goes about as well as you’d expect.

* In ''Fanfic/AmazingFantasy'', Izuku turns down [[ForWantOfANail turns down an alleyway]] instead of walking under a bridge and gets bitten by a genetically-altered (and possibly radioactive) spider, giving him the powers of Franchise/SpiderMan. A few weeks later, a [[OlderAndWiser 47-year-old]] Peter Parker drops into Izuku's universe after a brawl with Mysterio.
* ''Fanfic/TheAmazingSpiderLuzInAcrossTheOwlVerse'' is a crossover of ''WesternAnimation/TheOwlHouse'' and ''Franchise/SpiderMan'' where Luz has Spider-Man's powers.

* ''[[http://www.fanfiction.net/s/10020026/1/Delivered-From-Frollo Delivered From Frollo]]'' crosses ''WesternAnimation/TheHunchbackOfNotreDame'' with ''WesternAnimation/{{Fantasia}}''.

* ''Fanfic/DeanThomasAndTheCurseOfJumanji'' is a crossover fic between ''Franchise/HarryPotter'' and ''Franchise/{{Jumanji}}''

* ''[[WebVideo/MichaelVsJasonEvilEmerges Michael Vs. Jason: Evil Emerges]]'' is a crossover FanFilm by Radical Talent, pitting [[Characters/FridayThe13thJasonVoorhees Jason Voorhees]] from the ''Franchise/FridayThe13th'' franchise against [[Characters/HalloweenMichaelMyers Michael Myers]] from the ''Franchise/{{Halloween}}'' franchise.

* ''Object Shows Unite'' is a crossover between many different ObjectShows [[note]]''WebAnimation/BattleForDreamIsland'', ''WebAnimation/InanimateInsanity'', ''WebAnimation/ObjectUniverse'', ''WebAnimation/ObjectMayhem'', ''Inanimate Fight-Out'', ''WebAnimation/ChallengeToWin'', ''WebAnimation/BrawlOfTheObjects'', ''WebAnimation/ObjectOverload'', ''The Strive for the Million'', ''Object Illusion'', ''WebAnimation/ObjectLand'', ''Next Top Thingy'', ''WebAnimation/ObjectHavoc'', ''Object Insanity'', ''WebAnimation/BrawlForObjectPalace'', ''WebAnimation/ObjectLockdown'' and ''Lockout'', ''[[WebAnimation/PaperPuppets Paper Puppets Take 2]]'', ''WebAnimation/ObjectMadness'', ''WebAnimation/ObjectInvasion'', ''WebAnimation/ObjectTerror'', ''WebAnimation/ObjectConnects'', ''[[WebAnimation/ObjectFiller Object Filler Again]]'', ''WebAnimation/YetAnotherGameshow'', ''Battle for the Respect of Roboty'', ''WebAnimation/UltimateInsanity'', ''WebAnimation/ModernObjects'', ''WebAnimation/OpenSourceObjects'', ''Nonexistent Living'', ''WebAnimation/AnimatedInanimateBattle'', ''Incredible Items'', and ''The Object Project''[[/note]] as well as the author's own {{Original Character}}s.
* ''WebAnimation/GoryToons''. Essentially, it's ''WebAnimation/HappyTreeFriends'', but the ironic shtick is more or less replaced with kid-friendly characters. And yes, the Happy Tree Friends themselves remain.

%% Unsorted and non-alphabetized
* ''[[https://fanfiction.net/s/7622098/1/Declassified Declassified]]'' is a ''Series/LawAndOrderUK'' fanfic that has Matt Devlin recovering from the bullet wounds he sustained and explaining to a stunned Alesha and Ronnie that he's an Immortal from the ''Series/{{Highlander}}'' series, and that he is actually a false identity for Archie Kennedy, a character from ''Series/HoratioHornblower''.
* ''Fanfic/TheDoctorAndTheEnterprise'' by Jean Airey crosses ''Series/DoctorWho'' and ''Series/StarTrekTheOriginalSeries'', when the Fourth Doctor's TARDIS materializes in the transporter room of the USS Enterprise on her way home at the end of her Five Year Mission.
* ''[[http://www.fanfiction.net/s/2322545/1/Halo_Republic_Commando Halo Republic Commando]]'' is a crossover between ''Franchise/StarWars'' and ''Franchise/{{Halo}}'' where the characters of ''VideoGame/StarWarsRepublicCommando'' (and some friends and enemies) meet Master Chief and company in the ''Halo'' universe. There is a sequel that takes place mostly in the ''Star Wars'' universe during the events of the Original Trilogy.
* ''[[https://archiveofourown.org/works/41777340/chapters/104812500 Solo Endeavors]]'' is a crossover between ''VideoGame/SuperSmashBros'', ''VideoGame/Persona5'', and ''VideoGame/PunchOut'', focused on Jackie, a member of the band Music/MonstaX, going to Tokyo.
* In ''[[http://www.fanfiction.net/s/8514012/2/Keena-the-Defendants-of-Constan-Magic-Academy Keena & the Defendants of Constan Magic Academy]]'', starting in chapter 8, the group go to an AlternateUniverse that features characters from the anime film ''Anime/LoupsGarous''.

* In ''[[http://www.fanfiction.net/s/5493333/1/Brother_Bubbles Brother Bubbles]]'', Space Marine Terminator finds himself in Rapture. Then meets a Little Sister.

* ''[[http://www.fanfiction.net/s/8985296/1/Avengers-The-Next-Generation There’s a Time and Place to Die But This Ain’t]]'' crossovers ''Film/{{The Avengers|2012}}'' and ''Film/PitchPerfect''. It features Beca as Tony and Pepper's daughter and the rest of the cast as various superheroes.
* 1d4Chan's [[https://1d4chan.org/wiki/Codex_-_The_Covenant Codex The Covenant Codex]] is a set of [[GameMod fan-made rules]] for fielding ''Franchise/{{Halo}}'s'' [[ScaryDogmaticAliens Covenant]] in ''TabletopGame/Warhammer40000'' battles. The HeroUnit lore involves Covenant heroes battling [=IoM=] SpaceMarines; for example, Cheif Tartarus threatening to eat Blood Ravens Chapter Master Gabriel Angelos. There is also [[https://1d4chan.org/wiki/Codex_-_The_Banished a codex for the Banished,]] the heretic Covenant from ''Halo Wars 2.''
* ''[[https://www.fanfiction.net/s/12381819/1/The-Connie-Ronnie-Switcheroo The Connie-Ronnie Switcheroo]]'' largely takes place in the ''WesternAnimation/TheLoudHouse'' universe, where two of the characters are observing an AlternateUniverse where one of those characters (Ronnie Anne Santiago) has swapped places with a character from ''WesternAnimation/StevenUniverse'' (Connie Maheswaran), resulting in the two characters befriending the opposite main characters (Lincoln Loud and Steven Universe) of those respective shows. This is achieved by using mutliversal transmitter goggles, which were apparently borrowed from [[Franchise/RickAndMorty Rick Sanchez]] of all people.
* The game-idea series [[http://crossoverx.wikia.com/wiki/Crossover_X_Wiki Crossover X]] practically ''lives'' on this trope. It even uses the word "crossover" in its name.
* ''[[http://www.fanfiction.net/s/10020026/1/Delivered-From-Frollo Delivered From Frollo]]'' crosses ''The Hunchback of Notre Dame'' with ''Fantasia''.
* ''VideoGame/{{Deltatraveler}}'' is a crossover between ''VideoGame/{{Undertale}}'' and ''VideoGame/{{Deltarune}}'', where Kris and Susie wake up in the underground.
* ''[[http://www.fanfiction.net/s/5803383/1/Divine_Intervention Divine Intervention]]'': The [[Film/TheBoondockSaints MacManus brothers]] meet the [[Series/{{Supernatural}} Winchester brothers.]] And it is COOL.
* ''[[https://archiveofourown.org/works/14487714 Game of Mass Destruction]]'' crosses over multiple fandoms and has The Joker as president.
* There's a fanfic series by [[https://www.fanfiction.net/u/4205892/GamesMaster64 GamesMaster64]] called "The Legend of Hyrule Hearts" (shortened to [="LoHH"=] by the author), which crosses over ''Franchise/TheLegendOfZelda'' and ''Franchise/KingdomHearts'' ... for the first story anyway... WordOfGod states that the series will cross over into multi-crossover territory in later parts. The second part [[spoiler: will establish pairings. Link is said to be paired with Sia, the titular princess of ''VideoGame/LadySia'' and Sora will be paired with Sheba from ''VideoGame/GoldenSun'']]. How that will work out remains to be seen...
** WordOfGod still hasn't mentioned ''how'' the characters will travel to the other worlds, but perhaps that'd get into spoiler territory.
*** WordOfGod states there are also 20 parts planned, with about five specials. This guy's in it for the long haul. The series appears to be dead, but the author blames it on writer's block and real-life being busy.
* [[http://www.fanfiction.net/s/7897742/1/Platinum-Angel This fic]], a crossover of ''Manga/{{Chobits}}'' with, of all things, ''Franchise/AssassinsCreed'' (trope page [[Fanfic/PlatinumAngel here]]). Word from the author is that the eventual sequel will add ''Manga/MidoriDays'' to the mix as well.
* ''[[https://archiveofourown.org/works/16749352/chapters/39293203 Only Void Remains]]'' is a crossover of ''Manga/BungoStrayDogs'' and ''Anime/PuellaMagiMadokaMagica'' and follows the plot of the Light Novel ''Dazai Osamu and the Dark Era'' roughly. Uncommonly for the genre, it is an amalgamation of the two universes (the characters from Bungo Stray Dogs follow the laws of the Madoka Magica universe) and the characters of the franchises don't meet eachother. The endnote implies that it is part of a larger crossover universe.
* ''[[http://www.fanfiction.net/s/7843635/1/Portalborn Portalborn]]'' is actually inspired by the ''VideoGame/Portal2'' Mod for ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]''. In starts off using the original elements of Fall of the Space Core after pitting [[{{Tsundere}} The]] [[BloodKnight Dragonborn]] with the weird and cooky [[CrazySurvivalist Doug Rattmann]]. It gets crazy, then evolves with a mysterious and adventurous plot.
* Raquaza Master's [[http://s1.zetaboards.com/PokeTown_2/index/ Pokemon Squad]] fanfics are supposed to combine the characters from Franchise/{{Pokemon}}, ''WesternAnimation/KaBlam!'', ''Series/BarneyAndFriends'' (Barney is going to be one of the main antagonists), ''WesternAnimation/DannyPhantom'', ''WesternAnimation/{{Animaniacs}}'', ''Series/SesameStreet'' (Elmo's going to be an upcoming villain), many video games, and much, much more.
%% * Creator/RoseOfPollux writes these occasionally.
* [[http://www.fanfiction.net/community/Seanzilla115-s-Multi-crossover-stadium/86737/3/0/1/ Seanzilla115's Multi crossover stadium]], This Fanfiction community contains some of the greatest crossover stories by the greatist authors Fanfiction.Net has to offer.
* ''[[http://www.fanfiction.net/s/6095074/1/Takamachi_Nanoha_of_2814 Takamachi Nanoha of 2814]]'' is a ''Anime/MagicalGirlLyricalNanoha'' Crossover with ''ComicBook/GreenLantern''. Then, it started to cross over with ''everything'' by chapter 3. Written by the almost infamous Shadow Crystal Mage, so you know it's good. [[Fanfic/TakamachiNanohaOf2814 Now with its own page.]]

* This [[http://www.fanfiction.net/s/7878969/1/The-Transformers-Marvel-Continuty fanfic]] is a shared universe for the Transformers and Marvel characters. as of 2013 a standalone Marvel and an official crossover story are yet to be written, but there are plans to do so.
* These [[https://www.youtube.com/watch?v=O2sUOlf-DVs two]] [[https://www.youtube.com/watch?v=0SRUCfgSj_0 videos]] make a sort of crossover between ''Manga/LuckyStar'' and ''Literature/HaruhiSuzumiya''.
* While not a Fanfic, [[https://www.youtube.com/user/LogoAttitude this Youtube user]] makes videos which present "what if" situations dealing with [[VanityPlate television logos]], which also includes gems like [[https://www.youtube.com/watch?v=r6r3yR0PzCE "What if Steven Bochco collaborated with 4K!ds Entertainment?"]].
* Due to the increased popularity of ''Fanfic/OnePieceASmashAdventure'', other users have attempted to make similar crossovers based on this. Most notable is [[https://www.fanfiction.net/u/447022/Game2002 Game2002]] who basically took the same concept, this time with ''Touhou'' characters. His crossover, ''[[https://www.fanfiction.net/s/5681268/1/Touhou-Journey-to-the-Smashing-Beyond Touhou: Journey to the Smashing Beyond]]'' was also a huge hit among fans.
* ''[[https://archiveofourown.org/works/47832523 Skeeter! Crossover of Calamity]]'' crosses over the creator's own webcomic [[https://herecomesskeeter.cfw.me of the same name]] with (as of this writing) ''WesternAnimation/SouthPark'' and ''WesternAnimation/LooneyTunes''.
* ''[[https://www.fimfiction.net/story/371039/magic-school-days Magic School Days]]'' is a crossover between ''Franchise/HarryPotter'' and ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' where the Cutie Mark Crusaders express a desire to attend a magic school like Celestia's school. While within hearing range of Discord. Shenanigans ensue. Along with no small amount of shipping. Directly inspired ''Fanfic/IfWishesWerePonies'', above.

* ''Fanfic/HailToTheKingThuktunFlishithy'' is a crossover between ''Franchise/{{Godzilla}}'' and ''Anime/NeonGenesisEvangelion'', using a amalgamated continuity for the former that also incorporates ''Series/ZoneFighter''. The rewrite replaces Zone Fighter with Series/{{Ultraman}}.

* In ''Fanfic/HauntedMansionAndTheHatboxGhost'', following the "official" crossover with "The Nightmare Before Christmas" that the "Haunted Mansion Holidays" event is, the characters from this movie are sometimes featured in the stories. ...Ah, and the Grinch from "How the Grinch stole Christmas" made a cameo ONCE in a single-panel comic, too.

* ''Fanfic/InfinityTrainBlossomingTrail'' is an ''WesternAnimation/InfinityTrain'' crossover with ''Anime/PokemonTheSeries'' where Chloe Cerise decides to find herself and grow not by going through a Pokémon journey, but by visting the infinite dimensions in the Infinity Train itself.
* Much like the story above, ''Fanfic/InfinityTrainBoilingPoint'' is an ''WesternAnimation/InfinityTrain'' crossover, but with ''WesternAnimation/TheOwlHouse'' instead, detailing [[TheSocialDarwinist Boscha]]'s journey after entering the titular train.
* ''Fanfic/InfinityTrainStarFinder'' is a crossover between ''WesternAnimation/InfinityTrain'' and ''WesternAnimation/TheLoudHouse'' where Stella boards the Train after a bad day on Gus Games & Grub.

* ''WebAnimation/ZanyToTheMax'' has an episode where the Warners (it's an ''WesternAnimation/{{Animaniacs}}'' fan series) enter the world of ''Literature/TheTimeMachine'' and try to help the Time Traveler find Weena as part of a contest. If they win, they will be able to [[ImTakingHerHomeWithMe take Weena home with them]]. [[spoiler: They don't win. WebAnimation/{{Homest|arRunner}}ripe [[AuthorAvatar Runner]] does instead.]] The episode is implied to turn into a MassiveMultiplayerCrossover by the end.
--> '''News Reporter:''' We just got reports of [[WesternAnimation/ThePowerpuffGirls1998 three super-powered sisters from the city of Townsville, Animenia]], in the Warner Bros. studio.
--> '''Yakko:''' Super-powered sisters? Townsville, Animenia? [[BorrowedCatchPhrase Yes!]] Come, Warners. We must prepare for tomorrow.
--> '''Wakko:''' Why, Yakko? What are we going to do tomorrow?
--> '''Yakko:''' [[WesternAnimation/PinkyAndTheBrain The same thing we do every day, Wakko]]. Unfortunately, I have no idea what that is.
--> '''WesternAnimation/PinkyAndTheBrain''': They're zany, and they're the Warners, eight, eight, eight, eight, eight.
** There is a crossover episode in every season.
** And Season 3 consists of ''entirely'' crossover episodes!
* In ''[[http://www.fanfiction.net/s/8514012/2/Keena-the-Defendants-of-Constan-Magic-Academy Keena & the Defendants of Constan Magic Academy]]'', starting in chapter 8, the group go to an AlternateUniverse that features characters from the anime film Loups=Garous.

%%What song?* This song combines ''Anime/PokemonTheSeries'' and ''Franchise/{{Digimon}}'' to the tune of ''WesternAnimation/{{Mulan}}''.
%%* Creator/HansVonHozel:
%%--> "One day, Manga/{{Naruto}} was sit on a beach.\\
%%It was many suns in the sky.\\
%%Suddenly, [[Franchise/DragonBall Vegeta]]!"
%%** ''World of Danube: A ''Film/MammaMia[=/=]''Literature/HarryPotter'' crossover''.
* ''[[http://archiveofourown.org/works/10027490 Operation Epic Beer Run]]'' and ''[[https://archiveofourown.org/works/10525005 And Miles To Go Before I Sleep]]'' cross ''Film/TheMartian'' with the Franchise/MarvelCinematicUniverse via [[spoiler: Dr. Beck being one of Bucky Barnes's descendants]].

----


!! Common Crossovers
* In Anime fanfiction (and sometimes in other media), a quite common way to establish a plot, especially in PeggySue fics, is to have a wish be granted by [[Manga/AhMyGoddess Belldandy or her sisters]]. Whether this crossover is minor or major varies between fics.
* ''Film/{{The Avengers|2012}}'' crossed with ''Literature/TheHungerGames'' has some surprisingly good crossovers, including the [[AnyoneCanDie heartbreaking]] ''[[http://archiveofourown.org/works/413095/chapters/685873 Embrace the Fire]]'' and the [[SparedByTheAdaptation less heartbreaking]] ''[[https://www.fanfiction.net/s/9775871/1/Something-to-Avenge Something To Avenge]]''.
* ''Series/BuffyTheVampireSlayer'' has a natural crossover point in the second season episode "Halloween", in which the main characters turn into their costumes for the night. The portal Buffy jumps through in the Fifth Season finale also provides a great opportunity for Buffy to visit some other show or story, as does the presence of [[RealityWarper Reality-Warping vengeance demons]].
* ''WesternAnimation/CatDog'' has even been crossed over with the {{anime}} ''[[Franchise/LoveLive Love Live! School Idol Project]]'' of all things on Website/DeviantArt. [[TalkingAnimal Dog]] and [[TheDitz Honoka Kousaka]] as friends, anyone?
* A favourite for many seems to be ''Series/DoctorWho'', due to the remarkable ease with which the Doctor can be inserted in any story just by having the TARDIS land there.
** The first well-known example is 1981's "The Doctor and the Enterprise" by Jean Airey, which crosses Series/DoctorWho and Series/StarTrekTheOriginalSeries, when the Fourth Doctor's TARDIS materializes in the transporter room of the USS Enterprise on her way home at the end of her Five Year Mission.
** One of the most famous, ''Fanfic/TheManWithNoName, is a ''Series/{{Firefly}}'' / ''Doctor Who'' crossover, which some say should be officially added to {{Canon}}.
** Yet it VERY strangely lists one of the unofficial rules of the internet dealing with crossovers (specifically, [[Franchise/TouhouProject rule ⑨]]
** There's also ''Fanfic/AHero'', a crossover with ''Anime/PuellaMagiMadokaMagica'' which subverts most ''Series/DoctorWho'' crossover formulas by instead inserting [[ScaryDogmaticAliens Dalek]] [[MadScientist Sec]] to fix the mess.
** Another crossover that's become increasingly popular is Superwho, which combines ''Doctor Who'' with ''Series/{{Supernatural}}''.
*** Add one more show, ''Series/{{Sherlock}}'', to get Superwholock, which has become quite popular on Tumblr.
** All it took was one scene where a pony had a David Tennant-like hairstyle and an hourglass on his quarter. The result is that under crossovers at Website/FanFictionDotNet, ''Doctor Who'' is the most popular thing to cross into the world of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', beating out Franchise/SonicTheHedgehog.
** ''Fanfic/ChildrenOfTime'' crosses Ten's era with Literature/SherlockHolmes '''and''' ''WesternAnimation/SherlockHolmesInTheTwentySecondCentury''. Holmes and Watson take Martha Jones' place in Season 3 as Companions, with just a handful of episodes staying close to the original. The Eleventh Doctor is planned to make an appearance eventually...
* ''Literature/TheDresdenFiles'' has a lot of crossovers, including a rare crossover with ''Series/{{Buffy|The Vampire Slayer}} that ''doesn't'' involve its "Halloween" episode. [[https://www.fanfiction.net/s/6600971/1/Higher-Stakes-A-Fanfiction-of-the-Dresden-Files Higher Stakes: A Fanfiction of the Dresden Files]] is complete. It contains spoilers for ''Changes'' and the ''[[ComicBook/BuffyTheVampireSlayer Buffy Season 8]]'' comics, replaces everything after ''Changes,'' and after the ''Buffy'' comics arc "Time of Your Life".
* ''Webanimation/EverythingIsBroken'' is about ''Webanimation/HappyTreeFriends'' characters playing ''Westernanimation/MyLittlePonyFriendshipIsMagic'' {{creepypasta}} games that [[TheGamePlaysYou come to live and attack them]].
* [[http://www.fanfiction.net/u/1263379/gabriel_blessing Gabriel Blessing]] is well known for his two ''VisualNovel/FateStayNight'' crossovers:
** ''Fanfic/TheHillOfSwords'', a ''Literature/TheFamiliarOfZero'' crossover wherein Louise summons Shirou as her familiar. This FanFic revived the whole concept of "Let's have Louise summon a different person than Saito !"
** ''Fanfic/InFlight'', a ''Manga/{{Sekirei}}'' crossover where Shirou discovers his NotQuiteDead mother, Takami Sahashi, and replaces Minato as the Ashikabi of the North.
* Fanfic-wise, it's almost impossible to find a fandom that ''doesn't'' have a crossover with ''Literature/HarryPotter''.
** There are crossovers of ''WesternAnimation/TheLandBeforeTime'' with ''Franchise/StarWars'', ''[[Literature/InheritanceCycle Eragon]]'', ''Franchise/MegaMan,'' and, in one case, ''VideoGame/{{Halo}}.'' [[http://www.fanfiction.net/s/3007925/1/Star_Wars_The_Land_Before_Time_A_Jedis_Destiny Amazingly, many find that the Star Wars/Land Before time crossover in question is actually good.]]
*** [[http://www.fanfiction.net/s/4307557/1/Harry_Potter_and_the_Land_Before_Time Found the cross between Harry Potter and The Land Before Time!]]
*** "Voldemort has found a way to go back [[ArtisticLicensePaleontology thousands of years]], to the time of the great dinosaurs"? That's not a promising opening line. There's even a [[http://www.fanfiction.net/s/5426174/1/ Land Before Time MassiveMultiplayerCrossover series on FanFiction.net.]]
** There is a really good one between ''Literature/HarryPotter'' and ''VideoGame/FinalFantasyVIII'' that starts when Harry, age 5, is magically transported to the world of [[VideoGame/FinalFantasyVIII FF8]] and once there he becomes a fine Gunblade fighter and is somehow able to use [[VideoGame/FinalFantasyVIII FF8]] magic and do everything one can in the game... without using Guardian Forces. He later has to go back to his own world, where an evil Dumbledore lays in waiting... See [[http://www.fanfiction.net/s/3471134/1/ here for the prequel+ Philosopher's Stone]] arc, [[http://www.fanfiction.net/s/3531911/1/ here for the Chamber of Secrets]] arc and [[http://www.fanfiction.net/s/3580477/1/ here for the Prisoner of Azkaban]] arc. It's a pity that the third arc is not finished...
** There's a small collection of ComicStrip/CalvinAndHobbes[=/=]Literature/HarryPotter crossovers, all involving Calvin being a wizard. [[http://www.fanfiction.net/Harry_Potter_and_Calvin_Hobbes_Crossovers/224/266/ Give em a look.]] [[http://www.fanfiction.net/s/6548722/1/Calvin_and_Hobbes_in_the_Wizarding_World This one is particularly good so far.]]
** Harry Potter in ''Film/ThePrincessBride''. Hermione dreams the people she knows into the plot of the movie, with herself in the role of the Grandson being read the book by Dumbledore. [[http://www.fanfiction.net/s/135041/1/Harry_Potter_and_the_Florinese_Dream No, really!]]
** One involved the plot of ''Pretty Little Liars'' being re-imagined in the Potter universe. Unlike most other crossovers, the characters of both series don't actually meet. [[http://www.fanfiction.net/s/6701410/1/Pretty_Little_Witches Here it is]]
** Since both Harry and Edward Elric are looking for the PhilosophersStone at some point, there's a lot of crossover fanfiction with ''Manga/FullmetalAlchemist''.
** ''Snakeskins'' is, without a doubt, one of the best fanfics in the whole crossover with ''Webcomic/HetaliaAxisPowers'' fandom, in which the two universes are blended amazingly and England and Italy are still their immortal Nation-tan selves while they're at Hogwarts. It... sounds kinda confusing, but it's a lot simpler in context.
** ''Fanfic/HarryPotterBecomesACommunist'' does some crossovers with other ''Harry Potter'' fanfics. This consists of, to date, brief appearances by the Professor Quirrell from ''Fanfic/HarryPotterAndTheMethodsOfRationality'', Ebony Dark'ness Dementia Raven Way from ''FanFic/MyImmortal'', and Rhysenn Malfoy from ''Fanfic/TheDracoTrilogy''.
* Franchise/{{Highlander}}. You can dump Duncan or Connor or any of the other Immortals in almost any historical period; or assume, for a series set today that this or that character is Immortal; or for series set in the future, assume that someone from a 20th/21st C. series was a Highlander and hadn't lost his/her head before then. Of all the methods that ''Series/LawAndOrderUK'' fanfic writers used to revive the murdered DS Matt Devlin, revealing that he was an Immortal--as well as technically crossing over with ''another'' [[Series/HoratioHornblower series]] in the story ''[[https://fanfiction.net/s/7622098/1/Declassified Declassified]]'' by revealing that he was also Archie Kennedy--might have been the most creative.
* There are a lot of fan arts involving [[WesternAnimation/TheJungleBook1967 Kaa]] the Snake hypnotizing various victims. Google search "Kaa" and you'll see what the deal is.
* Two ''Series/LawAndOrderUK'' fanfics:
** One that crosses over with ''Series/{{Highlander}}'' and ''Series/HoratioHornblower'' has Matt Devlin recovering from the bullet wounds he sustained and explaining to a stunned Alesha and Ronnie that he's immortal and is really Archie Kennedy of the latter series (also probably lampshading [[Creator/JamieBamber Jamie Bamber's]] ChronicallyKilledActor status).
** Another sent Matt and Ronnie to Washington, DC to work with the ''Series/{{NCIS}}'' team. Rather [[HilariousInHindsight amusing]] considering that a) Creator/JamieBamber eventually began a recurring role on the show, and b) the team actually did work with UsefulNotes/BritishCoppers at one point.
* 4 crossovers with ''WesternAnimation/LooneyTunes'' and ''WesternAnimation/WinxClub'' have been done by [[http://www.fanfiction.net/~looneywriter looneywriter]] and [[http://www.fanfiction.net/~kidswbyungsta kidswbyungsta]]. Sure enough, keeping in with the Looney Tunes style of humor, as well as adding characters from ''WesternAnimation/{{Animaniacs}}'', ''WesternAnimation/TinyToonAdventures'', and ''WesternAnimation/PinkyAndTheBrain'' may have helped them grow to be loved by many on Website/FanFictionDotNet.
* One author has crossed over ''WesternAnimation/MegasXLR'' with [[http://www.fanfiction.net/s/7777108/1/The_Golem_of_New_Jersey Harry Potter]], [[http://www.fanfiction.net/s/7734042/1/Megas_Five0 Lilo & Stitch]] and [[http://www.fanfiction.net/s/7929483/1/Perry_XLP Phineas & Ferb]], crossed over Phineas & Ferb with [[http://www.fanfiction.net/s/7712752/1/Seasonal_Sentai_Summerranger Super Sentai]] and [[http://www.fanfiction.net/s/7858523/1/The_Platypus_Rider Kamen Rider]], and then combined all the previous into a [[http://www.fanfiction.net/s/7998417/1/Megas_Final_Wars Mega Crossover]].
* One of the mst prevalent type of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fan fics and fan works in general. The most regular kinds are those such as ''Fanfic/BetterLivingThroughScienceAndPonies'' (''VideoGame/{{Portal}}'') and ''WebAnimation/TurnaboutStorm'' (''VisualNovel/AceAttorney''), where another series' characters are transported to Equestria, sometimes [[FisherKingdom turning into ponies in the process]], and {{Fusion Fic}}s such as ''Fanfic/FalloutEquestria'' ([[VideoGame/{{Fallout}} guess]]) and ''Fanfic/FriendsOfASolarEmpire'' (''VideoGame/SinsOfASolarEmpire'').
** Another example is ''Fanfic/TheLittlePonyLegend'', crossing over ''Friendship is Magic'' with ''WesternAnimation/TheLegendOfKorra''. It's also something of a self-insert fic, as the ponies are "inserted" into Korra's plot and vice versa over the course of the seven fics present.
* It's easier to count the things that Naruto hasn't had crossovers with when it's had crossovers with ''ComicStrip/TheBoondocks'', ''VideoGame/DukeNukem'', ''WesternAnimation/AquaTeenHungerForce'', ''Film/MeanGirls'', ''Godzilla'', ''Franchise/FridayThe13th'' and probably the strangest with ''Series/MarriedWithChildren''.
* There are a few fics that cross over all the Creator/{{Nicktoons}}. One that does this along with extreme AU along with Alternate History (Vlad is now king of an FictionalCounterpart of America!) would be [[http://chesspiece.smackjeeves.com Chess Piece]] by Tropers/NeoYi. It's filled with tons of continuity nods and has everything, from ''WesternAnimation/TheWildThornberrys'', ''WesternAnimation/InvaderZim'', and ''WesternAnimation/DoraTheExplorer'' to ''WesternAnimation/{{Doug}}'', ''WesternAnimation/AaahhRealMonsters'', ''WesternAnimation/CatDog'', and ''WesternAnimation/MyLifeAsATeenageRobot''. Seriously; it is also [[RuleOfCool awesome]].
* Decent [[http://www.fanfiction.net/Pokemon_and_Digimon_Crossovers/80/257/ Pokemon/Digimon crossovers]] are not that common in fanfiction, but of late some interesting new submissions have popped up.
* The ''Manga/RanmaOneHalf'' fandom loves to create crossovers. There exist several archives devoted to them. Particularly common are crossovers with ''Franchise/SailorMoon'' which has a sub-genre called the FukuFic that can involve this type of crossover, but primarily involves Ranma in a SailorFuku.
* Due to their popularity, it's very easy to find on [=deviantArt=] crossovers involving ''LetsPlay/TheRunawayGuys'', mostly by [=ThatOneNPC=]. The guys have crossed over with such works as ''Film/TheWizardOfOz'', ''Literature/AliceInWonderland'', ''VideoGame/Portal2'', ''VideoGame/{{Slender}}'', ''VideoGame/ProfessorLaytonVSAceAttorney'' and ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' ([[http://fav.me/d4vqwcn no really]]), to name a few.
** Each of the guys themselves has been subject to individual crossover fanart. For instance, [[http://fav.me/d4wius7 here]] is fanart crossing over LetsPlay/{{Chuggaaconroy}} with VideoGame/ProfessorLayton. (Chugga liked it, by the way.)
* Is there anyone Franchise/SonicTheHedgehog hasn't met yet? The blue hedgehog has had crossovers with [[http://www.fanfiction.net/Sonic_the_Hedgehog_and_Percy_Jackson_and_the_Olympians_Crossovers/253/2622/ Percy Jackson]], [[http://www.fanfiction.net/Sonic_the_Hedgehog_and_Godzilla_Crossovers/253/448/ Godzilla]], [[http://www.fanfiction.net/Transformers_Beast_Wars_and_Sonic_the_Hedgehog_Crossovers/65/253/ Transformers]], [[http://www.fanfiction.net/Sonic_the_Hedgehog_and_Halo_Crossovers/253/1342/ Halo]], [[http://www.fanfiction.net/Sonic_the_Hedgehog_and_iCarly_Crossovers/253/2898/ iCarly]], [[http://www.fanfiction.net/Sonic_the_Hedgehog_and_Gorillaz_Crossovers/253/2340/ Gorillaz]], [[http://www.fanfiction.net/Mighty_Ducks_and_Sonic_the_Hedgehog_Crossovers/243/253/ the Mighty Ducks]], [[FanFic/FuckTheJesusBeam Tengen Toppa Gurren Lagann]], [[https://www.fanfiction.net/Sonic-the-Hedgehog-and-Strawberry-Shortcake-series-Crossovers/253/4511/ Strawberry Shortcake]] and [[https://www.fanfiction.net/Sonic-the-Hedgehog-and-Tinkerbell-Crossovers/253/3713/ Tinkerbell]]. Are any of these even remotely connected?
** But [[http://www.fanfiction.net/Sonic_the_Hedgehog_and_Mario_Crossovers/253/347/ we all know who the big winner is...]]
** [[http://www.fanfiction.net/s/7891955/1/Sonic-Generations-Friendship-is-Timeless This]] fanfiction crosses over ''Franchise/SonicTheHedgehog'' with the cast of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', in a reimagining of the plot of ''VideoGame/SonicGenerations''. It goes far beyond what the original game gives, showing the author did their research. For instance, Ponyville serves as the central [[NoPunIntended hub]], similar to the White Void in the game, the Death Egg Robot battle in the original is replaced with Nightmare Moon and in this fanfiction, Tails fights Metal Sonic instead of Sonic, possibly a reference to ''VideoGame/SonicTheHedgehog4''. The author has even adapted the updated canon of Friendship is Magic into the fanfic. However, how the author intends to implement alicorn Twilight is currently unknown.
** ''VideoGame/SonicManiaAndHatsuneMiku'': A ''very'' well-done GameMod of ''VideoGame/SonicMania'' that replaces the titular character with [[Music/{{Vocaloid}} Hatsune Miku]] wearing a Sonic parka, amongst a few other things.
** It's crazy just how many crossovers on Website/FanFictionDotNet exist between ''Franchise/SonicTheHedgehog'' and ''Franchise/SuperMarioBros''. Sure, [[VideoGame/MarioAndSonicAtTheOlympicGames this may have become canon]] but authors were doing it way before then.
* Franchise/SpiderMan has a slew of crossovers on Website/FanFictionDotNet. [[http://www.fanfiction.net/s/5011834/1/Web_of_Shadow_Fallout This one]] crossed with the Franchise/TeenageMutantNinjaTurtles, and [[http://www.fanfiction.net/s/3914495/1/A_Hospital_In_Jersey this one]] crossed with ''Series/{{House}}'' are quite good.
* An author on [=FFnet=] has created [[http://www.fanfiction.net/s/2322545/1/Halo_Republic_Commando a crossover]] between ''Franchise/StarWars'' and ''Franchise/{{Halo}}'' where the characters of ''VideoGame/StarWarsRepublicCommando'' (and some friends and enemies) meet Master Chief and company in the ''Halo'' universe. There is a sequel that takes place mostly in the ''Star Wars'' universe during the events of the Original Trilogy.
* ''Franchise/StarWars'' and ''Franchise/StarTrek''. The rivalry between their fanbases and The UltimateShowdownOfUltimateDestiny makes it a bygone conclusion feature some, and for those to require at least one major battle between the United Federation of Planets and the Galactic Empire, but there are certain exceptions.
** Another good one is [[http://sfdebris.com/unity.asp Unity]] by notable contributor Website/SFDebris. What is a wormhole was connected from the Delta Quadrant circa Voyager's fifth season to the Star Wars Universe circa early Return of The Jedi, (disrupting the Rebel Alliance's attempt to attack the second Death Star.) Involved every character from TNG forward-moving well into the future and exploring all the potential interactions in detail.
** To complete the trifecta of renowned ''Star Wars'' vs. ''Star Trek'' fanfics, there's [[http://bbs.stardestroyer.net/viewtopic.php?t=404&highlight= StarCrossed]].
* At least 300 crossovers of ''WesternAnimation/TotalDrama'' are available on fanfiction.net
** [[http://www.fanfiction.net/~supertrip One writer]] has written the aptly named "Total Crossover" series. They are currently working on ''3'' installments at the same time. [[spoiler: The scenes with [[WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius Jimmy Neutron]] border on RevengeFic.]]
* [[RulesOfTheInternet Rule ⑨]]: If it exists, there is a crossover with ''Franchise/TouhouProject''. [[FanficRecs/TouhouCrossover The series even has its own article.]]
* One author has even crossed over (at various times) Transformers with [[http://www.transformersfanfic.com/viewstory.php?sid=2439&chapter=1 Knight Rider]], The [[http://www.transformersfanfic.com/viewstory.php?sid=865&chapter=1 Real Ghostbusters]], Franchise/MastersOfTheUniverse, [[http://www.transformersfanfic.com/viewstory.php?sid=873&chapter=1 Sailor]] [[http://www.transformersfanfic.com/viewstory.php?sid=866&chapter=1 Moon]], [[http://shebakoby.deviantart.com/art/Jewel-Of-4-Sparks-32879715 Inuyasha]], and [[http://www.transformersfanfic.com/viewstory.php?sid=5021&chapter=1 Judge Judy]].
* Likewise, you will be able to find crossovers between ''[[Literature/TheTwilightSaga Twilight]]'' and just about anything.
** Not many Crossover fics have managed to be as awesome as ''[[http://www.fanfiction.net/s/4821971/1/Edward_meets_Sherlock_Holmes Sherlock Holmes vs Edward Cullen]]''.
* The longtime crossover champion for TV shows is ''The Witness'' by Michele Martin, which managed to cross ''Series/ForeverKnight'', ''Series/{{Highlander}}'', ''Series/TheXFiles'', ''Series/QuantumLeap'', and the ''Series/{{Starman}}'' TV series. Believe it or not, the fic manages to keep all those balls in the air successfully, and even bring in cameos from a few other series, all while following a coherent plot and keeping the characters in character!
%%* Literature/TheWTFJournal crosses over at least five fandoms. %%ZCE
* [[https://archiveofourown.org/works/41777340/chapters/104812500 Solo Endeavors]] is a crossover between ''VideoGame/SuperSmashBros'', ''VideoGame/Persona5'', and ''VideoGame/PunchOut'', focused on Jackie, a member of the band Monsta X, going to Tokyo.

* Fanfic/KhaosOmega uses this prominently by sending someone (usually the [[ArtifactTitle titular]] [[RedBaron Amethyst Angel]], a modified version of ''VideoGame/GalaxyAngel II'''s Anise Azeat) to another game's world. With a massive dose of multiverse theory on top of it, and a faction of immortal multiverse-traveling crime fighters (of whom the aforementioned Amethyst Angel is a high-ranking member, and founded by six siblings (five of whom are based on real-life people Khaos knows including third-oldest Jet being based on Khaos himself), things can go crazy insanely fast.[[/index]]]
** Some of Khaos' stories even include characters created by ''other'' authors, including two Christmas-themed stories that guest-star the heroes of two other Galaxy Angel fanfictions (one of which inspired Khaos' own version behind the creation of Jace Davies, along with a WhatIf-style one for Marty Jordan's origins), and a planned sequel to a Mario story that notably includes a pitch-black OC Boo (named Dark Moonlight) from the original.
** Some of Khaos' characters have also gone the other way:
*** The sequel to the What-Ifs (this one involving Kazuya and the Rune Angels while continuing to honor the original's variances in terms of who Arnold and Tact are in relationships within each parallel universe) sees Amethyst herself appear (suggested by Khaos himself for the chapter that would become Natsume's route for Kazuya as a way to avoid the CrossDresser episode). Amethyst was identified as a Khaos character by the other author whose lead OC prominently appeared in Khaos' Christmas special (and one of his works, along with the Natsume-eventually route of the What-Ifs, are mentioned specifically as to how Arnold Williams (the lead OC of the author behind Khaos creating Jace Davies and Marty Jordan) and William Johnson (the lead OC of the author who identified Amethyst as Khaos') made it to the Christmas party).
*** Three works by former author "Witchan" featured Khaos' characters (Jet and Amethyst, plus Taylor 'Thundrana' Johnson and Georgia Millar, appear in a ''Mario Kart'' story that Khaos still references often (usually in tandem with Khaos' own sequel); Jet and Amethyst, alongside Rochelle, appear in the inspiration of a story series since fused with another author's own similarly-themed ''Franchise/{{Pokemon}}'' stories (three, in particular, follow eventual Rainbow Angels Rosa Copeland, Roxanne Mazaki, and Jasmine Levesque as prostitutes though Jasmine goes out of her way to hide her being one); and Rochelle herself appears in a third where a tech malfunction by overloading leads to Rochelle creating an upgraded variant of the tech in question).
*** The ''Mario'' story mentioned above, where Roy hosts a party while Bowser's out (Wendy opts out and is the one to inform the co-conspirators of a fatal flaw in how Roy got the majority of the stuff), sees Jet appear as the referee of a hardcore game of dodgeball won by the aforementioned Dark Moonlight.
*** Speaking of Jet, the Koopalings (minus an uninvolved Junior and under their cartoon names), and Dark Moonlight, a prank war-themed story (also with Wendy opting out) has Jet, alongside his eldest sister Hollie and Rochelle, appear as a wild-card third 'Cyan' team; Dark Moonlight, a member of one of the two starting teams (Red, which he joined partway through), recognizes Jet by the alternate name 'Ace Skyfire'. The author of the prank war story also provided a character (Rose) to the Roy-hosted party story (Rose, Jet, and Dark Moonlight are the only three members of the first wave of 131 who do not take off immediately).[[index]]

* ''Fanfic/DungeonKeeperAmi'' is an improbable mix of ''VideoGame/DungeonKeeper'' and ''Anime/SailorMoon''. And quite good, exploring the dissonance between the MagicalGirl that Ami still wants to be, and the AntiHero -- or even AntiVillain -- that she has to become in order to survive and have a chance of returning home.

* When ''Fanfic/WithStringsAttached'' was first conceived, it was supposed to be a [[Music/TheBeatles Beatles]]/''TabletopGame/DungeonsAndDragons'' crossover. Luckily, the author quickly matured out of that notion, and the story turned into something far more interesting and complex, though its {{RPG}} roots are quite evident still.

* ''[[https://www.fimfiction.net/story/371039/magic-school-days Magic School Days]]'' is a crossover between ''Franchise/HarryPotter'' and ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' where the Cutie Mark Crusaders express a desire to attend a magic school like Celestia's school. While within hearing range of Discord. Shenanigans ensue. Along with no small amount of shipping. Directly inspired ''If Wishes Were Ponies'', above.

* [[https://www.fimfiction.net/story/371039/magic-school-days ''Magic School Days'']] is a crossover between ''Franchise/HarryPotter'' and ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' where the Cutie Mark Crusaders express a desire to attend a magic school like Celestia's school. While within hearing range of Discord. Shenanigans ensue. Along with no small amount of shipping. Directly inspired ''If Wishes Were Ponies'', above.

* ''Fanfic/IfWishesWerePonies'' is a crossover between ''Franchise/HarryPotter'' and ''WesternAnimation/MyLittlePonyFriendshipIsMagic''. Harry arrives in Equestria before recieving his Hogwarts letter. Shenanigan ensue. There are dozens of stories under the Harry Potter tag on Website/FimFiction.

* ''Fanfic/IfWishesWerePonies'' is a crossover between ''Franchise/HarryPotter'' and ''WesternAnimation/MyLittlePonyFriendshipIsMagic''. Harry arrives in Equestria before recieving his Hogwarts letter. Shenanigan ensue. There are dozens of stories under the Harry Potter tag.

* ''Fanfic/TheDragonAndTheButterfly'' is a crossover fic between ''WesternAnimation/HowToTrainYourDragon'' and ''WesternAnimation/{{Encanto}}''. Here, Hiccup and Toothless left the archipelago before the former learned about the dragon nest. While searching for a new home, the two are caught in a storm and land in a magical part of Colombia...

* There are a few fics that cross over all the Creator/{{Nicktoons}}. One that does this along with extreme AU along with Alternate History (Vlad is now king of an FictionalCounterpart of America!) would be [[http://chesspiece.smackjeeves.com Chess Piece]] by NeoYi. It's filled with tons of continuity nods and has everything, from ''WesternAnimation/TheWildThornberrys'', ''WesternAnimation/InvaderZim'', and ''WesternAnimation/DoraTheExplorer'' to ''WesternAnimation/{{Doug}}'', ''WesternAnimation/AaahhRealMonsters'', ''WesternAnimation/CatDog'', and ''WesternAnimation/MyLifeAsATeenageRobot''. Seriously; it is also [[RuleOfCool awesome]].

* ''[[https://www.wattpad.com/story/340867880-skeeter-crossover-of-calamity Skeeter! Crossover of Calamity]]'' crosses over the creator's own webcomic [[https://herecomesskeeter.cfw.me of the same name]] with (as of this writing) ''WesternAnimation/SouthPark'' and ''WesternAnimation/LooneyTunes''.

*** Three works by former author "Witchan" featured Khaos' characters (Jet and Amethyst, plus Taylor 'Thundrana' Johnson and Georgia Millar, appear in a Mario Kart story that Khaos still references often (usually in tandem with Khaos' own sequel); Jet and Amethyst, alongside Rochelle, appear in the inspiration of a story series since fused with another author's own similarly-themed Pokemon stories (three, in particular, follow eventual Rainbow Angels Rosa Copeland, Roxanne Mazaki, and Jasmine Levesque as prostitutes though Jasmine goes out of her way to hide her being one); and Rochelle herself appears in a third where a tech malfunction by overloading leads to Rochelle creating an upgraded variant of the tech in question).
*** The Mario story mentioned above, where Roy hosts a party while Bowser's out (Wendy opts out and is the one to inform the co-conspirators of a fatal flaw in how Roy got the majority of the stuff), sees Jet appear as the referee of a hardcore game of dodgeball won by the aforementioned Dark Moonlight.

* Likewise, you will be able to find crossovers between ''Literature/{{Twilight}}'' and just about anything

* ''[[https://www.wattpad.com/story/340867880-skeeter-crossover-of-calamity Skeeter! Crossover of Calamity]]'' crosses over the creator's own webcomic [[https://herecomesskeeter.cfw.me of the same name]] with (as of this writing) ''WesternAnimation/SouthPark'' and ''WesternAnimation/LooneyTunes''.

----

* ''Fanfic/{{Empathy}}'' is a major crossover between ''WesternAnimation/BigHero6'', ''WesternAnimation/InsideOut'', and ''WesternAnimation/{{Home}}''.

* ''Fanfic/BondBreaker'' has a SelfInsert of the author get pulled around the multiverse by a race of godlike beings wanting to find the answer to the "is there a God?" question. He gets to visit Manga/{{Naruto}}, [[Anime/NeonGenesisEvangelion NGE]], VideoGame/MassEffect, Literature/HarryPotter, VideoGame/TheLegendOfZelda, WesternAnimation/{{Frozen|2013}}, Anime/SwordArtOnline, Franchise/StarWars, ''TabletopGame/Warhammer40000'', VisualNovel/FateStayNight and [[VideoGame/TheLegendOfZeldaTheWindWaker Wind Waker]], to name a few.