History Main / CommonCrossover

* ''WesternAnimation/{{Brave}}'', ''WesternAnimation/HowToTrainYourDragon'', ''WesternAnimation/{{Tangled}}'', and ''WesternAnimation/RiseOfTheGuardians'' took FriendlyFandoms to a new level and became a fandom of its own, Fanfic/RiseOfTheBraveTangledDragons. And then, they are often send to [[Literature/HarryPotter Hogwarts]] or the [[WesternAnimation/AvatarTheLastAirbender Avatar world]].

* ''Literature/LandOfOz'', ''Literature/PeterPan'', and ''Literature/AlicesAdventuresInWonderland'' due to their similarly whimsical feels. As both the ''Land of Oz'' and ''Alice's Adventures In Wonderland'' series are in the public domain, there are even for-profit works that cross them over.

*** It's no surprise that ''Series/TeenWolf'' has been enthusiastically and seamlessly crossed with Supernatural, but it remains to be seen if it will join the Superwholock party.
** There's a decent amount of crossover with PoliceProcedural shows like ''Series/{{NCIS}}'' and ''Series/CriminalMinds''. Mostly due to the recurring Winchester brothers chased by the FBI subplot.

* Crossovers with the VideoGame/PaperMario series are incredibly common, usually adaptations. Some of the most popular are ''Fanfic/EdventureOfTheThousandYearDoor'' and the ''FanFic/PaperMarioX'' series.

** ''VideoGame/{{Off}}'', due to being offbeat [=RPG=]s woth unsettling content.

** [[Creator/{{Capcom}} Unsurprisingly]], there's also a fair amount of art crossing it over with ''VideoGame/GhostTrick''... this is saying something, since ''Ghost Trick'''s fandom is comparatively obcure.

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** While many crossovers have them meeting at their current ages (often with Mabel and Dipper winding up in the Unknown), another common trope is to have Dipper and Mabel be[[SpinOffspring the future children of]] either Wirt or Greg. (While [=GF=] is definitely in the 2010s, [=OTGW=] seems to be set sometime in the near past.) The SiblingYinYang aspect works especially well since ''Gravity Falls'' makes GenerationXerox a major theme near the end.

* ''WesternAnimation/GravityFalls'' and ''WesternAnimation/OverTheGardenWall'' have become a popular combination in general; both involve a SiblingTeam consisting of a SociallyAwkwardHero and a CloudCuckooLander, with tones that switch from silly to very creepy. It's even common enough that the CrossoverShip of Dipper/Wirt gained quite a bit of traction, and is known as [[IdiosyncraticShipNaming Pinescone]]. There's a fair bit of them meeting at their current ages (often with Mabel and Dipper winding up in the Unknown), but some of it actually assumes that Dipper and Mabel are [[SpinOffspring the future children of]] either Wirt or Greg; usually the latter, since all of the aforementioned characters are white while Wirt has a MaybeEverAfter with AmbiguouslyBrown Sara. (While [=GF=] is definitely in the 2010s, many fans believe [=OTGW=] takes place around the 1980s.) The SiblingYinYang aspect works especially well since ''Gravity Falls'' makes GenerationXerox a major theme near the end.

* The Buzz/Jessie ship from the ''WesternAnimation/ToyStory'' trilogy inspired a flood of fanart crossovers with the SpaceWestern ''Series/{{Firefly}}''.

* ''Franchise/PrettyCure'':

** ''Anime/MahoGirlsPrecure'': While most ''Franchise/PrettyCure'' entries are commonly crossed with other Tokusatsu shows, ''Maho Girls'' is usually paired with ''Series/KamenRiderWizard'' and ''Series/MahouSentaiMagiranger'' due to similar themes, until it garnered a Pixiv tag titled "[[http://tinyurl.com/zyejnzg Nichi Asa Majutsu Kyoukai]]", translated as "Sunday Morning Magic Association."

** There was also a time trying to tie G1 into ''[[WesternAnimation/MyLittlePonyFriendshipIsMagic Friendship is Magic]]'' was popular among fans that were accepting of both and liked the original mythology. The most notable is ''Fanfic/TheElementsOfHarmonyAndTheSaviorOfWorlds'', which is about the human children now adults returning to Equestria; the fic also includes other Hasbro series like ''WesternAnimation/TheTransformers'', ''WesternAnimation/GIJoeARealAmericanHero'', ''WesternAnimation/{{Jem}}'', ''WesternAnimation/{{Inhumanoids}}'', ''WesternAnimation/DungeonsAndDragons'' and ''WesternAnimation/{{MASK}}''.

* ''WesternAnimation/ThomasTheTankEngine'' and ''Tugs'' tend to cross over a lot, due to having similar subject matter (anthropomorphic vehicles), a similarly realistic setting (apart from the anthropomorphic vehicles) and the same creative team. From Series 3 of ''Thomas'' onwards, there was even an element of canon support to this, as models from ''Tugs'' were used in ''Thomas.''

* ''Literature/Worm'' and ''WebAnimation/RWBY'' have a surprising number of crossovers. At time of writing, fanfiction.net lists more Worm/RWBY crossovers than ''Worm''/''Manga/My Hero Academia'' crossovers, despite the latter work having significantly more in common with the former (e.g. superheroes). Only four other franchises have more Worm crossovers than RWBY[[labelnote:*]]In descending order: Fate/Stay Night, Harry Potter, Naruto, and Warhammer[[/labelnote]], all of which are significantly more well-known than RWBY.

* ''Series/BuffyTheVampireSlayer'' and ''Series/DoctorWho'' cross over so often in fics you can easily start mixing canon from both in your mind. Both expanded universes have had brief crossovers from the other universe -- an Eighth Doctor novel has a cameo from Spike, and the Tenth Doctor and Rose make a cameo appearance in ''Buffy'' season 8.

* ''Series/BuffyTheVampireSlayer'':
** Xander (or, less frequently, Willow or Dawn) gets sucked into a dimensional rift etc., and ends up on ''[[Series/{{Firefly}} Serenity]].''

* ''Series/{{Battlestar Galactica|2003}}'' eventually gets crossed with any running Sci-Fi due to the LostColony premise. For instance, the refugee fleet entering ''Franchise/StarTrek's'' [[TheFederation United Federation of Planets]] with the resulting political fallout and attacks by the Cylons is a common idea. Even given this, ''Galactica''/''[[Franchise/StargateVerse Stargate]]'' fics are common as mud.
** Any ''[[Series/StargateSG1 Stargate]]''/''Series/{{Battlestar Galactica|2003}}'' fics usually will have the following features:
*** 1) the Cylon attack that kicked off the series's action either never happened, or went drastically the reverse of how it happened in canon, with the Colonials winning;
*** 2) the Colonials are/become a militaristic regime, bent on conquest;
*** 3) said conquest includes conquering their "rogue" thirteenth colony, Earth;
*** 4) the Colonials completely underestimate how much [[CurbStompBattle curb-stompage]] a couple of Prometheus-class ships equipped with Asgard weaponry can dish out.
*** This is almost certainly due to a massive upsurge of FollowTheLeader after ''Fanfic/ReunionsAreABitch'' pioneered the above plot points.
** Strangely, the number of ''[=oBSG/=]Franchise/StarWars'' crossovers can probably be counted on one hand, even though the former was very heavily influenced by the latter.
* A crossover of yesteryear; ''Series/{{Highlander}}'' and ''Series/ForeverKnight''. There are a ''lot'' of those.

* ''Series/BuffyTheVampireSlayer'' and ''{{Series/Merlin|2008}}'', due to Anthony Head being a major player in both series. Usually it involves Buffy getting transported back to Camelot somehow, but a few other variations exist as well.

* ''{{Series/Angel}}'' and ''Series/BuffyTheVampireSlayer'' get crossed with ''{{Series/Bones}}'' a lot because David Boreanaz’s characters are quite similar in some ways and the theory of Booth being Angel’s Shanshu, or reward of becoming human, has quite a few fans.

* ''Franchise/SilentHill'' is one popular resort town.

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** ''Franchise/{{Danganronpa}} is a common target because of the franchises' shared focus on over-the-top trials.

* ''Franchise/AceAttorney'':
** Both this franchise and ''VideoGame/TraumaCenter'' are over-the-top DS games about a relatively ordinary profession. Both are TwentyMinutesIntoTheFuture, and both take place in California (or Japan in the JP versions). Though it's generally agreed they fit well together, crossovers are surprisingly uncommon.
** Goes well with ''VideoGame/EliteBeatAgents'', probably because both are surprisingly well-Americanized DS games featuring {{Large Ham}}s with AnimeHair. Heck, one such crossover is even on the FanficRecs page! ''VideoGame/{{osu}}!'' includes one of such fanfics, to the tune of Music/{{Queen}}'s ''Don't Stop Me Now''.
** [[Creator/{{Capcom}} Unsurprisingly]], there's also a fair amount of art crossing it over with ''VideoGame/GhostTrick''... this is saying something, since ''Ghost Trick'''s fandom hasn't really gotten fired up yet.

* Any folklore/historical series you can think of has at least one ''Franchise/FateSeries'' crossover, considering the sheer amount of Servants a given character can be paired with.
* ''VideoGame/{{Ib}}'', ''VideoGame/ForestOfDrizzlingRain'', ''VideoGame/AngelsOfDeath'', and ''Paranormal Syndrome'' are often crossed over together under the "Free Horror" fan-banner, as all of them are UsefulNotes/RPGMaker games that involve some combination of mysterious young girl and plot-important handsome adult man. ''VideoGame/YumeNikki'', despite not really having an adult man that matches the theme (the closest being how people interpret Seccom Masada-sensei), is included on occasion.

* ''VideoGame/KantaiCollection'':

** Kancolle and ''Videogame/ToukenRanbu'' are commonly crossed over due to being hosted on the same website and having similar premises. The only difference between the two is that while Kancolle focuses on warship girls, ''Touken Ranbu'' focuses on Historical sword boys.

* ''WesternAnimation/TotalDrama:'' At the height of the ''Literature/{{Twilight}}'' craze, WholePlotReference fics were incredibly common. Usually Duncan and Courtney were "cast" as Edward and Bella, though it changed when Duncan/Gwen became the FandomPreferredCouple.

*** Hell, ''Friendship is Magic'' and ''Transformers'' in general are common crossover fodder, and even Creator/IDWPublishing and Creator/{{Hasbro}} themselves have been known to indulge somewhat[[note]]although neither of them have made any proper crossover fiction between the two, save for Hasbro releasing a two-page promotional comic for Hascon, and even then, it also serves as a MassivelyMultiplayerCrossover with other Hasbro franchises[[/note]].

* "Mystery Kids" (occasionally known as "Spook Crew") is a MegaCrossover of various {{Kid Hero}}es involved in supernatural adventures. [[http://www.mysterykidsofficial.tumblr.com/ This]] {{fan film}} has the cast set as [[WesternAnimation/GravityFalls Dipper, Mabel,]] [[WesternAnimation/{{Coraline}} Coraline, Wybie,]] [[WesternAnimation/ParaNorman Norman, Neil,]] [[VideoGame/{{Psychonauts}} Raz, and Lili,]] but it's not uncommon to see {{fan art}} with [[WesternAnimation/InvaderZim Dib]] and WesternAnimation/DannyPhantom. Fan works made after 2012 might bring in [[WesternAnimation/OverTheGardenWall Wirt]] and [[WesternAnimation/StevenUniverse Steven]].

* A lot of people have made fanvids of ''Manga/{{Trigun}}'' to ''{{Series/Firefly}}'''s theme song.

** ''Anime/MahoGirlsPrecure'': While most Franchise/PrettyCure entries are commonly crossed with other Tokusatsu shows, ''Maho Girls'' is usually paired with Series/KamenRiderWizard and Series/MahouSentaiMagiranger due to similar themes, until it garnered a Pixiv tag titled "[[http://tinyurl.com/zyejnzg Nichi Asa Majutsu Kyoukai]]", translated as "Sunday Morning Magic Association."

* The LoadsAndLoadsOfCharacters in ''VideoGame/{{Touhou}}'' means you can get a bunch of obvious crossovers. Or as some say: "Rule ⑨: If it exists, there is a Touhou version of it". Also, Rule P: If it exists, it has been "ponified" (that is, the characters are drawn as ponies from ''WesternAnimation/MyLittlePonyFriendshipIsMagic''). It overlapped with Rule ⑨ once.

* ''VideoGame/ToukenRanbu'' itself. Aside from the aforementioned, this game is frequently crossed over with other works set in historical settings in which the historical figures formerly owning the swords show up, such as ''VideoGame/SengokuBasara'' (to the point where it can be safely assumed "Touken Basara" is the ''most'' popular type of crossover in the [=TouRabu=] fandom ''ever''), ''VisualNovel/{{Hakuouki}}'' or even ''Manga/{{Gintama}}''. There is also a recurring trend to cross over with ''Webcomic/AxisPowersHetalia'' and ''Manga/HozukisCoolheadedness'' by placing a character from either series (usually Japan from the former and Hōzuki from the latter) as the saniwa. Crossing over with ''VideoGame/{{Onmyoji}}'' is fairly popular among Chinese fans of this game after it introduces its own sword boy Onigiri (voiced by Creator/KosukeToriumi as the cherry on top).

* You don't have to look far to find ''{{WebComic/Homestuck}}'' versions of things; in addition to being very popular, it's easy to whip up a [[SailorEarth Sburb session]] for any given fandom, and if you can mimic its distinctive SignatureStyle then that goes a long way.
* Webcomic/GirlGenius is crossed over incredibly often with {{Webcomic/Narbonic}}, to the point that they’re sometimes not even considered crossovers. This is likely because [[TheSparkOfGenius the spark]] in Webcomic/GirlGenius is pretty much identical to [[ScienceRelatedMemeticDisorder mad genius]] in {{Webcomic/Narbonic}}.

* Many fan-works revolve around the basketball teams from ''Manga/SlamDunk'' and ''Manga/KurokoNoBasuke'' playing against one another.

* Crossovers between ''WesternAnimation/{{Brave}}'' and ''WesternAnimation/HowToTrainYourDragon'' are becoming quite popular. Both films have been crossed over with ''WesternAnimation/{{Tangled}}'' a lot, and some stories mix all three of them.
** [[WesternAnimation/RiseOfTheGuardians Jack Frost too.]] Often they're referred to as "[[Fanfic/RiseOfTheBraveTangledDragons The Big Four]]" and as best buds. [[Literature/HarryPotter And then there's the Hogwarts AU.]]

* ''Franchise/{{Batman}}'' with ''WesternAnimation/MiraculousLadybug'' is a surprisingly common trend. A lot of it stems from the Fanfic/MaribatAU, which began the trend of [[CrossoverShip shipping Marinette with Damian]]; other Marinette/Bat-Boy ships are also starting to become popular. In an alternate trend, something Bruce is revealed to be Marinette's biological father.

* ''Franchise/{{Batman}}'' with ''WesternAnimation/MiraculousLadybug'' is a surprisingly common trend. A large proportion of these crossover fanfics involve shipping Marinette (Ladybug) with Damian (Robin).

* ''Literature/GoodOmens'' is a natural crossover with ''LiveActionTV/Supernatural'', seeing as SPN's demon Crowley was modeled after ''Good Omens''' demon Crowley, so there's a lot of meshing of their respective apocalypse/heaven-and-hell/demons-and-angels plots.

* ''WesternAnimation/{{Frozen|2013}}'':
** There is a ''ridiculous'' amount of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' FanArt crossed over or mashed up with ''Frozen''. The MLP fandom saw parallels with Elsa's uncontrolled powers nearly causing her to [[AboveGoodAndEvil abandon morality and society]] and Anna's attempt to rescue her from it with the backstory of Celestia and Luna (where Luna's jealousy caused her to attack Celestia and be exiled to the moon) and latched on hard. Elsa is drawn as a Unicorn or Alicorn, and Anna is usually drawn as an Earth Pony.
** ''Frozen'' and ''WesternAnimation/{{Tangled}}'' thanks to Eugene and Rapunzel having a split second cameo in ''Frozen''.
** Elsa has ice powers, as do Jack from ''WesternAnimation/RiseOfTheGuardians'' and Periwinkle from ''Franchise/DisneyFairies'', so many fans crossover (and ship) the characters.
* The Buzz/Jessie ship from the ''WesternAnimation/ToyStory'' trilogy inspired a flood of fanart crossovers with the SpaceWestern ''Series/{{Firefly}}''.
* ''WesternAnimation/TheNightmareBeforeChristmas'' and ''WesternAnimation/CorpseBride'' are often crossed over because Creator/TimBurton wrote them. The events of ''Nightmare'' will have happened, despite the fact that the events of ''Nightmare'' takes place in 1993, the year the movie came out, and ''WesternAnimation/CorpseBride'' takes place somewhere in the Victorian Era.

* Crossovers between ''WesternAnimation/{{Brave}}'' and ''WesternAnimation/HowToTrainYourDragon'' are becoming quite popular. Both films have been crossed over with ''WesternAnimation/{{Tangled}}'' a lot, and some stories mix all three of them.
** [[WesternAnimation/RiseOfTheGuardians Jack Frost too.]] Often they're referred to as "[[Fanfic/RiseOfTheBraveTangledDragons The Big Four]]" and as best buds. [[Literature/HarryPotter And then there's the Hogwarts AU.]]

* ''Franchise/DisneyFairies'' with ''WesternAnimation/StrangeMagic'' thanks to both starring fairies.

* There are countless crossovers and {{Crossover Ship}}s between Franchise/DisneyAnimatedCanon and just about every popular Disney-inspired animated film. ''WesternAnimation/ThePrinceOfEgypt'', ''WesternAnimation/TheSwanPrincess'', and ''WesternAnimation/{{Anastasia}}'' are popular examples.
* Creator/{{Disney}}'s ''Franchise/LiloAndStitch'' and Creator/DreamWorksAnimation's ''WesternAnimation/HowToTrainYourDragon'' franchises receive a ton of crossover fan art (especially of Stitch and Toothless) for not only featuring unique, misunderstood human beings who bond with strange, powerful, yet oddly adorable creatures, but also because their [[WesternAnimation/LiloAndStitch original]] [[WesternAnimation/HowToTrainYourDragon films]] share the same directors and writers in Creator/ChrisSanders (who created and voiced Stitch and practically self-plagiarized a bit for his design of the Night Fury Toothless) and Creator/DeanDeBlois (who would also write and direct ''HTTYD''[='=]s [[WesternAnimation/HowToTrainYourDragon2 sequel]] [[WesternAnimation/HowToTrainYourDragonTheHiddenWorld films]]).

* If they're not crossing their Disney properties with ''Franchise/KingdomHearts'', they'll cross it with ''Series/OnceUponATime''. For even more fun, the writers have pretty much out and established that it's in the same universe as ''{{Series/Lost}}'' and ''Film/{{Tron}}''. There have also been fanart crossovers with ''Franchise/MassEffect'' due to the same actor playing Kaiden Alenko and Jiminy Cricket.