History CanonWelding / CrossMedia

* ''TabletopGame/WitchGirlsAdventures'' is a [[TheVerse 'verse]] created almost entirely through Canon Welding. The 'verse [[BleachedUnderpants started as a fetish e-zine called "The Shrinking Sorceress"]] by MANGA GRAPHIX, dedicated to sorceresses transforming people into animals and inanimate objects. Later on, many of the same people went on to write ''Witch Girls Tales'', theoretically a comic about young witches getting into mischief with their powers, and several characters and concepts from MANGA GRAPHIX stories ended up in the new 'verse. Completely independently, a different author wrote a comic called "Princess Lucinda," about the titular princess' love for wickedness and transforming people over the slightest offense. The ''Witch Girls Adventures'' game was created as a team-up between Channel M (the reconstituted MANGA GRAPHIX) and Abby Soto (the creator of Princess Lucinda), using characters from "The Shrinking Sorceress" (including some that hadn't yet appeared in ''Tales''), ''Witch Girls Tales'', and ''Princess Lucinda'' all in a single standalone universe.

* The OVA ''Manga/GiantRobo: The Day The Earth Stood Still'' and its companion manga ''The Day The Earth Burned'' incorporates practically ''all'' of Mitsuteru Yokoyama's work, including the first magical girl ''Manga/SallyTheWitch'', the tokusatsu show ''Iga No Kagemaru'', the eponymous giant robots, and historical characters from both the ''Literature/WaterMargin'' and ''Literature/RomanceOfTheThreeKingdoms''.

* ''Franchise/{{Transformers}}'' was split from its very beginning into separate comic and cartoon continuities. However, this rapidly splintered further and further, with different comics in different continuities being introduced, anime series being created, the introduction of the ''WesternAnimation/BeastWars'' and ''WesternAnimation/BeastMachines'' ranges which combine elements from previous continuities, [[Film/{{Transformers}} the live-action movies]] and so on.

** The canonical explanation of how multiversal singularities work, using [[Film/{{Transformers}} The Fallen]] as an example, [[MindScrew truly has to be read]] [[VoodooShark to be believed.]] [[http://tfwiki.net/wiki/Multiversal_singularity Here's a link.]]

* [[Ride/DisneyThemeParks Disney Parks']] [[AdventurersClub The Society of Explorers and Adventurers]] is this trope in a nutshell. What started as a way to retheme the Tokyo [=DisneySEA=]'s version of the [[Ride/TheTwilightZoneTowerOfTerror Tower of Terror]] has proceeded to be a franchise tieing together Hong Kong's [[Ride/TheHauntedMansion Mystic Manor]], and Magic Kingdom's Ride/JungleCruise and Ride/BigThunderMountainRailroad. What separates it from the Thunder Mesa in Disneyland Paris (mentioned in the Theme Parks section below) is the numerous easter eggs hinting that it's taking place in the same universe as Franchise/IndianaJones, ultimately confirmed with the Jock Lindsey's Hangar Bar in Disney Springs confirming the eponymous pilot was a member of the Society.

* Creator/NeilGaiman's ''Literature/AmericanGods'' had a cameo from Delirium of the Endless from ''ComicBook/TheSandman''. Given the Endless' nature it is entirely vague if that means the book takes place in the Franchise/DCUniverse or just is part of the same multiverse.

** ZO and J fight a multi-seasonal batch of monsters in Kamen Rider World (8-minute theme park thingy, may not be canonical but never said not to be, and not contradicting anything) which puts ''all three'' hiatus movies (yes, Shin provided a monster) into old-school KR continuity. Kuuga's mention of a Professor Hongo (and an imitation of him, which means he ''must'' have known ''the'' Hongo) put Kuuga and Agito into it as well. However, Decade makes the multiverse more complicated with its {{alternate universe}}s bearing variable resemblance to -- and ''rarely'' literally being -- the worlds of the actual series it's crossing over with. We even get Black and Black RX as separate worlds, as well as Kuuga and Agito, with alternate versions of some of the same people. Even more so, late in ''Double'' a member of [[NebulousEvilOrganisation Foundation X]] can be seen looking over data on OOO's Core Medals. Nothing came of this for over a year, until the crossover ''Film/KamenRiderXKamenRiderFourzeAndOOOMovieWarMegamax'' revealed that Foundation X would be playing a role, this time using the Astro Switches from ''Fourze''...and that Double and the first seven Showa Riders would be teaming up with Fourze and OOO. Given how Astro Switches ''are'' Gaia Memories this makes some sense (except for the Last One thing).

** The franchise has had this going since the beginning. The Showa-era shows ([[Series/KamenRider original]] through ''Series/KamenRiderBlackRX'') explicitly took place in the same universe, and the previous Riders would often show up near the end of the latest series to help out [[TheHero the current hero]]. The movies produced in the hiatus years (''Film/ShinKamenRiderPrologue'', ''Film/KamenRiderZO'', ''Film/KamenRiderJ'') and the Heisei shows (''[[Series/KamenRiderKuuga Kuuga]]'' onwards) abandoned this, except for a few rare crossover events. ''Series/KamenRiderDecade'' deliberately says that the Heisei shows all occupy their own separate universe...and then has the first nine (''Kuuga'' to ''[[Series/KamenRiderKiva Kiva]]'') forcibly merged, with Decade forced to travel to alternate versions of said worlds in an attempt to fix everything...and then there's the ''Decade'' movie ''All Riders vs. Great Shocker'', which crosses over with the entire Showa-era universe as well. ''Movie War 2010'' also adds ''Series/KamenRiderDouble'' to the mix. Then ''Series/KamenRiderFourze'' decided to just bite the bullet and imply at the end of episode 2 that every show in the franchise is set in the same universe, with WordOfGod saying that they're going to {{Retcon}} the elements of ''Decade'' that didn't work. For extra humor, ''Series/KamenRiderKabuto'' has a brief in-character cameo by the actor who plays Rider-1 in TheRemake ''Film/KamenRiderTheFirst'', and ''Series/KamenRiderRyuki'' had a DVD-exclusive joke episode where the protagonist [[AllJustADream dreams]] that he teams up with Series/KamenRiderAgito to battle Agito's EvilTwin.

** Take all the crossovers above, put two plus two with the ''Kamen Rider'' and ''TMNT'' {{multiverse}}s separately established by ''Decade'' and ''WesternAnimation/TurtlesForever'' respectively[[note]]Incidentally, both are 2009 anniversary specials.[[/note]], and toss in both the canonical ''Series/SamuraiSentaiShinkenger'' arc of ''Decade'' and ''VideoGame/TeenageMutantNinjaTurtlesSmashUp'' for kicks. End result? ''Kamen Rider'', ''Power Rangers'', ''Franchise/SuperSentai'', ''TMNT'', the ''Franchise/UltraSeries'', and ''VideoGame/RavingRabbids'' are all part of the multiverse. It's gotten to the point that, near as anyone can tell of the yet-unreleased ''Film/KamenRiderXSuperSentaiSuperheroTaisen'' movie, nobody except Marvelous and Decade know what the hell is going on. Even the narrator is baffled. And with Compati Hero Series ''The Great Battle IV'' this would tie in ''Franchise/{{Gundam}}'', the ''Ultra Series'', and ''Kamen Rider'', et al. with the aforementioned ''VideoGame/SuperRobotWars'' and... well. Just let your imagination go wild, one supposes.

** And ''[[ComicBook/Revolution2016 Revolution]]'' not only welds together their ''Transformers'' and ''[[ComicBook/GIJoeIDW G.I. Joe]]'' comics [[ComicBook/HasbroComicUniverse into one universe]] (with the statement being that all the ''Joe'' issues took place during a time where the Cybertronians were absent from Earth), but also brings in rebooted versions of [[ComicBook/RomIDW Rom the Space Knight]], [[ComicBook/MicronautsIDW the Micronauts]], ComicBook/ActionMan and WesternAnimation/{{MASK}}[[note]]the ''ComicBook/JemAndTheHologramsIDW'' comics are an odd case -- they apparently exist in the new Hasbro Universe, but for "reasons of tone" they're ExiledFromContinuity; the ''[[ComicBook/MyLittlePonyFriendshipIsMagicIDW My Little Pony]]'', ''ComicBook/DungeonsAndDragons'', and ''TabletopGame/{{Clue}}'' titles aren't part of it at all[[/note]], with all sorts of connections between characters and plot threads between everything -- Miles Mayhem was a member of Joe Colton's Adventure Team (and founded M.A.S.K. as an anti-Cybertronian deterrent team, with parts of their technology reverse-engineered from their captive, Decepticon triple-changer Blitzwing), Colton himself was on of a few Joe Team members who got replaced by Dire Wraiths (Rom's sworn enemy), Baron Karza found that Microspace was created by Micronus Prime (one of the thirteen Primes of Cybertronian lore), and Ore-13, a powerful energy source created by Decepticon Shockwave and seeded on Earth during the ice age, is what drives the plot, as ''everyone'' is trying to use it. [[spoiler:It's eventually revealed that Mayhem, Karza and the Dire Wraiths were working together to exploit Ore-13 for their own ends, only for Karza to go OneWingedAngel when he absorbs a bunch of Ore-infused Wraiths with his "enerchange" ability and takes down Mayhem; it ultimately takes the Micronauts, Rom, Soundwave, Matt Trakker and Mainframe working together to bring him down.]]

* Creator/ShotaroIshinomori's later ''Manga/SkullMan'' manga incorporates his earliest concept for the titular character of ''Kamen Rider'', monsters from said show, and Series/KamenRider himself, along with appearances of Joe Shimamura from the anime ''Manga/{{Cyborg 009}}'' and cameos from ''Series/HimitsuSentaiGoranger'', ''Series/RobotDetective'', ''Series/{{Inazuman}}'', and ''Series/{{Kikaider}}.'' A later anime version of ''Skull Man'' has a DownerEnding that connects it even more explicitly to ''Manga/{{Cyborg 009}}'': [[spoiler:Skull Man is defeated and turned into Black Ghost, the BigBad of ''009''.]]

* The ''VideoGame/EndlessFrontier'' series, which crosses over with both ''[[VideoGame/SuperRobotWarsOriginalGeneration Original Generation]]'' (which features Gilliam) and the even-more-mega-{{Crossover}} ''VideoGame/NamcoXCapcom''. And since ''VideoGame/NamcoXCapcom'' contains everything from ''Franchise/StreetFighter'' to ''VideoGame/{{Xenosaga}}'' (which also crosses over to ''Endless Frontier'') to ''VideoGame/{{Klonoa}}'', there are versions of all of those characters (but not the same versions that exist in their original games, yet still ''a'' version) in the Banpresto multiverse. With ''VideoGame/ProjectXZone'', any Creator/{{Capcom}} and Creator/BandaiNamcoEntertainment series not already included into this multiverse will most likely be added; however, there will also be dozens of Creator/{{Sega}} series in the game like ''VideoGame/VirtuaFighter'' and ''VideoGame/ValkyriaChronicles''.

** However, don't put away your migraine medicine ''just yet: OOO, Den-O, All Riders: Let's Go, Kamen Rider'' would have the ''Decade'' World of Kuuga BigBad instead of the ''Series/KamenRiderKuuga'' Big Bad representing the Grongi in the LegionOfDoom, which would have welded Decade and its madness right back in...if it weren't for the fact that the movie's ending implicitly makes the whole ordeal non-canonical to everything by virtue of [[spoiler:settling on a CloseEnoughTimeline where, in regards to ''Kamen Rider OOO'', Hina doesn't know Eiji]]. (Also, ''every'' character who appeared in Decade had their updated design from that series instead of their original designs, but that can be ignored - ''you'd'' use the shiny Decade suits instead of making all new ones that ''don't look as good'' in order to perfectly match the 1970s versions.)

** And ''[[ComicBook/Revolution2016 Revolution]]'' not only welds together their ''Transformers'' and ''[[ComicBook/GIJoeIDW G.I. Joe]]'' comics [[ComicBook/HasbroComicUniverse into one universe]] (with the statement being that all the ''Joe'' issues took place during a time where the Cybertronians were absent from Earth), but also brings in rebooted versions of [[ComicBook/RomIDW Rom the Space Knight]], [[ComicBook/MicronautsIDW the Micronauts]], ComicBook/ActionMan and WesternAnimation/{{MASK}}[[note]]the ''ComicBook/JemAndTheHologramsIDW'' comics are an odd case - they apparently exist in the new Hasbro Universe, but for "reasons of tone" they're ExiledFromContinuity; the ''[[ComicBook/MyLittlePonyFriendshipIsMagicIDW My Little Pony]]'', ''ComicBook/DungeonsAndDragons'', and ''TabletopGame/{{Clue}}'' titles aren't part of it at all[[/note]], with all sorts of connections between characters and plot threads between everything - Miles Mayhem was a member of Joe Colton's Adventure Team (and founded M.A.S.K. as an anti-Cybertronian deterrent team, with parts of their technology reverse-engineered from their captive, Decepticon triple-changer Blitzwing), Colton himself was on of a few Joe Team members who got replaced by Dire Wraiths (Rom's sworn enemy), Baron Karza found that Microspace was created by Micronus Prime (one of the 13 Primes of Cybertronian lore), and Ore-13, a powerful energy source created by Decepticon Shockwave and seeded on Earth during the ice age, is what drives the plot, as ''everyone'' is trying to use it. [[spoiler:It's eventually revealed that Mayhem, Karza and the Dire Wraiths were working together to exploit Ore-13 for their own ends, only for Karza to go OneWingedAngel when he absorbs a bunch of Ore-infused Wraiths with his "enerchange" ability and takes down Mayhem; it ultimately takes the Micronauts, Rom, Soundwave, Matt Trakker and Mainframe working together to bring him down.]]
** The follow-up ''ComicBook/{{Revolutionaries}}'' takes it further, bringing in all sorts of obscure concepts and tying up dangling plot threads from previous IDW titles, including various ''G.I. Joe''-related villains - Baron Ironblood from ''Action Force'' (the British 80s counterpart to ''G.I. Joe''), General Krieger from ''WesternAnimation/SgtSavageAndHisScreamingEagles'' (a mid-90s attempt to reboot the ''G.I. Joe'' line), Iron Klaw from ''WesternAnimation/GIJoeExtreme'', and the Transformers from ''Hearts of Steel'' (a universe where the Transformers landed on Earth in the 1800s and got {{Steampunk}} bodies).

** Fraggle Rock (the location) is basically a canon-welding tool, since it's established in the fourth season of the show that the Rock can magically link to many locations - some in our world, some in others. Uncle Matt also turned up in ''Film/TheMuppetsTakeManhattan'', and other creatures from the Rock have appeared as extras in Muppet productions throughout the 1990s. In turn, the Muppets share a universe with ''Series/SesameStreet''. Additionally, one creature occasionally seen in Fraggle Rock resembles Fizzgig from ''Film/TheDarkCrystal'', suggesting another link.

* Creator/RaymondEFeist's ''Literature/TheRiftwarCycle'', set in [[http://www.rpg.net/columns/designers-and-dragons/designers-and-dragons13.phtml Midkemia,]] setting of RPG publisher Midkemia Press, who were also Raymond E. Feist's college role-playing buddies. [[note]]"While I was writing Magician, it occurred to me that it was stupid to be creating all of this stuff for Midkemia and creating a separate world called Crydee. So I asked them if they had any objections to me combining the two, turning Crydee into a duchy on the far coast of this empty area of the kingdom and tailoring my story around that. (Interview, ''[[http://www.sierragamers.com/uploads/24082/Interaction/016_InterAction_Volume_5_Number_4_Winter_1992.pdf InterAction Magazine - Vol. V Number 4 - Winter 1992]]'')"[[/note]] ''Literature/TheRiftwarCycle'' includes Sierra's ''VideoGame/BetrayalAtKrondor'' and its novelization.

* Video game ''VideoGame/BlairWitchVolumeIRustinParr'' sets the original ''[[Film/TheBlairWitchProject Blair Witch]]'' movie and the video game ''VideoGame/{{Nocturne}}'', made by the same creators, in one world. And apparently the first ''VideoGame/BloodRayne'' game implies several times that it's set in the same world as ''Nocturne''.

* The Creator/GerryAnderson comics magazine of the 1960s, ''TV Century 21'', had a gimmick framing device of the magazine itself being a replica of a secret agent's newspaper from the 2060s. Thus, all the comics and prose were construed as "visual reports" of real events in a SharedUniverse, and the front page occasionally featured minor interactions between the plotlines. Although the Gerry Anderson series (such as ''Thunderbirds'' and ''Stingray'') would remain well-understood as a shared universe, this also implied to licensed properties: [[Franchise/DoctorWho the ''Dalek Chronicles'' comics]] were very much a part of the gimmick, with the ''Fireball XL5'' World Government being shown worrying about their military progresses in the front page and special features. Even franchises set in the 20th century rather than an arbitrary space-age future, such as ''Series/MyFavoriteMartian'', were worked into the continuity [[AWizardDidIt by a hair]], being construed as visual reports from "the [=TV21] Time Machine".

* Creator/ChrisBoucher's ''Franchise/DoctorWhoExpandedUniverse Literature/PastDoctorAdventures'' novel ''Corpse Marker'', and his semi-licenced audio series ''Kaldor City'', both indicate that ''Series/BlakesSeven'' takes place in the Franchise/{{Whoniverse}}. Specifically, these show that ''Blake's 7'' takes place in the same time period as Boucher's popular ''Series/DoctorWho'' story "[[Recap/DoctorWhoS14E5TheRobotsOfDeath The Robots of Death]]".
** This was very nearly canonical, as it happens; the [[OutsideContextProblem invasion force from another galaxy]] from the finale of Season 2 of ''Blake's 7'' were intended to be the Daleks at one point, but for one reason or another the idea was dropped.
** Creator/DouglasAdams' character Professor Chronotis from the novel ''Literature/DirkGentlysHolisticDetectiveAgency'' came from Adams' ''Doctor Who'' TV serial "[[Recap/DoctorWhoS17E6Shada Shada]]", which was left incomplete due to an electricians' strike. In the novel, at least partially for copyright reasons, it's not explicitly stated that Chronotis is a Time Lord in hiding, but it's clearly meant to be the same person. There's even an oblique little reference at the end to [[TheNthDoctor a strange young man]] permanently disabling his time machine while the POV character wasn't around...
* In TheFifties, [[ComicBook/DisneyMouseAndDuckComics Disney Comics]] began to spread until the {{canon}} of the comic stories encompassed not only the regular Donald-Mickey-Silly Symphonies[[note]]The ''Silly Symphonies'' universe refers to Bucky Bug and the Three Little Pigs, mainly.[[/note]] melting-pot, but also several animated features by the studio, the most notably integrated into the canon being ''Film/SongOfTheSouth'', ''WesternAnimation/SnowWhiteAndTheSevenDwarfs'' and ''WesternAnimation/{{Pinocchio}}''. It was later taken to ridiculous extents in TheSixties and TheSeventies, as the creators were beginning to run out of ideas. Aside perhaps of ''Snow White'', ''The Sword and the Stone'' and ''Song of the South'', the stories featuring such crossovers are very much CanonDiscontinuity, though some fans disagree with that decision of the company — they say that some of those stories were ''bad'', sure, but that they were bad because the writers didn't do their job, not because the crossover idea in itself was bad.

** The [[Fanfic/TheElementsOfHarmonyAndTheSaviorOfWorlds Hasbroverse]] follows a similar premise, which also includes ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' and ''WesternAnimation/DungeonsAndDragons''. The author sets the G1 MLP as G4's distant past, and used some BroadStrokes by using mostly Marvel's ''[[ComicBook/GIJoeARealAmericanHeroMarvel G.I. Joe]]'' and having the G1 Transformers each possess a spark (a concept introduced in ''WesternAnimation/BeastWars''). The Earth Defense Command, meanwhile, is a descendant of both the original Joe Team and their Russian counterparts, the Oktober Guard; their respective leaders (General Clayton "Hawk" Abernathy and Colonel Ivan Brekhov) are now the leaders of the US and Russia, while Cobra [[CurbStompBattle got decimated in 1994]] after an ill-advised attack on the Decepticons; only Cobra Commander and a few others managed to escape.

** And ''[[ComicBook/Revolution2016 Revolution]]'' not only welds together their ''Transformers'' and ''[[ComicBook/GIJoeIDW G.I. Joe]]'' comics [[ComicBook/HasbroComicUniverse into one universe]] (with the statement being that all the ''Joe'' issues took place during a time where the Cybertronians were absent from Earth), but also brings in rebooted versions of [[ComicBook/RomIDW Rom the Space Knight]], [[ComicBook/MicronautsIDW the Micronauts]], ComicBook/ActionMan and WesternAnimation/{{MASK}}[[note]]the ''ComicBook/JemAndTheHolograms'' comics are an odd case - they apparently exist in the new Hasbro Universe, but for "reasons of tone" they're ExiledFromContinuity; the ''[[ComicBook/MyLittlePonyFriendshipIsMagicIDW My Little Pony]]'', ''ComicBook/DungeonsAndDragons'', and ''TabletopGame/{{Clue}}'' titles aren't part of it at all[[/note]], with all sorts of connections between characters and plot threads between everything - Miles Mayhem was a member of Joe Colton's Adventure Team (and founded M.A.S.K. as an anti-Cybertronian deterrent team, with parts of their technology reverse-engineered from their captive, Decepticon triple-changer Blitzwing), Colton himself was on of a few Joe Team members who got replaced by Dire Wraiths (Rom's sworn enemy), Baron Karza found that Microspace was created by Micronus Prime (one of the 13 Primes of Cybertronian lore), and Ore-13, a powerful energy source created by Decepticon Shockwave and seeded on Earth during the ice age, is what drives the plot, as ''everyone'' is trying to use it. [[spoiler:It's eventually revealed that Mayhem, Karza and the Dire Wraiths were working together to exploit Ore-13 for their own ends, only for Karza to go OneWingedAngel when he absorbs a bunch of Ore-infused Wraiths with his "enerchange" ability and takes down Mayhem; it ultimately takes the Micronauts, Rom, Soundwave, Matt Trakker and Mainframe working together to bring him down.]]

* The ''VideoGame/SoulSeries'' is confirmed by WordOfGod to take place in the distant past of the ''VideoGame/{{Tekken}}'' universe due to the presence of [[LegacyCharacter Yoshimitsu]] in nearly every installment of both series (the ''Soul'' series Yoshimitsu didn't debut until ''Soulcalibur'', and he is [[LegacyImmortality eventually succeeded by]] Yoshimitsu the Second in ''Soulcalibur V''). The presence of ''Franchise/TheLegendOfZelda'', ''Franchise/StarWars'', ''VideoGame/GodOfWar'', Image Comics, and ''Franchise/AssassinsCreed'' characters are non-canonical (although Lizardman's character profile in ''SCV'' seems to imply that [[spoiler:he ate Kratos]]). As for ''Tales of Symphonia'' and ''Sgt. Frog'', it's left ambiguous.

* ''Creator/TeamFourStar'' connected their LetsPlay of ''VideoGame/DragonBallXenoverse'' to ''WebVideo/DragonBallZAbridged'' by way of AscendedFanon: namely, that their character Dumplin is a younger, less experienced Mr. Popo.

* The writers at Pixar had a hand in co-writing the Toybox stage of ''VideoGame/KingdomHeartsIII'', and were so pleased with the results, they apparently stated that Toybox is canon to the ''Toy Story'' films (set between 2 & 3).

** And then ''Series/KamenRiderGaim'' meets up with Kikaider. Namely, the version from ''KikaiderReboot'' instead of the one we met in "Let's Go, Kamen Riders."

** ''Let's Go, Kamen Rider'' also gives us cameos of Series/Inazuman, Series/{{Kikaider}}, Kikaider 01, and even ''Series/KaiketsuZubat''. So basically everything with Creator/ShotaroIshinomori's name on it officially coexists now, even if you didn't take ''Goranger vs. JAKQ'' (which had ''Series/KamenRiderV3, Series/KamenRiderAmazon'', and ''Series/{{Kikaider}}'' stated to be fighting the same LegionOfDoom overseas.) seriously before. Then one of the ''Kamen Rider Fourze'' movies goes and introduces Inazuman... based on ''Inazuman'' the manga, not the show, and so not the Inazuman encountered in ''Let's Go Kamen Riders.''

* Creator/ShotaroIshinomori's later ''Manga/SkullMan'' manga incorporates his earliest concept for the titular character of ''Kamen Rider'', monsters from said show, and Series/KamenRider himself, along with appearances of Joe Shimamura from the anime ''Manga/{{Cyborg 009}}'' and cameos from ''Series/HimitsuSentaiGoranger'', ''Series/RobotDetective'', ''{{Inazuman}}'', and ''Series/{{Kikaider}}.'' A later anime version of ''Skull Man'' has a DownerEnding that connects it even more explicitly to ''Manga/{{Cyborg 009}}'': [[spoiler:Skull Man is defeated and turned into Black Ghost, the BigBad of ''009''.]]

** When a Matt Trakker figure was released as ''Specialist Trakker'' in one of the ''G.I. Joe'' toylines, ''WesternAnimation/{{MASK}}'' was ''adopted'' into the ''G.I. Joe'' universe. (''M.A.S.K.'' originally started as Creator/{{Kenner}}'s counterpart to the Joes and the Transformers; it came under Hasbro's umbrella when tkey acquired Kenner Parker Tonka in 1991).

** ''Let's Go, Kamen Rider'' also gives us cameos of Inazuman, Series/{{Kikaider}}, Kikaider 01, and even ''Series/KaiketsuZubat''. So basically everything with Creator/ShotaroIshinomori's name on it officially coexists now, even if you didn't take ''Goranger vs. JAKQ'' (which had ''Series/KamenRiderV3, Series/KamenRiderAmazon'', and ''Series/{{Kikaider}}'' stated to be fighting the same LegionOfDoom overseas.) seriously before. Then one of the ''Kamen Rider Fourze'' movies goes and introduces Inazuman... based on ''Inazuman'' the manga, not the show, and so not the Inazuman encountered in ''Let's Go Kamen Riders.''

** The ''Transformers'' and ''Franchise/GIJoe'' often take place in the same universe. The G1 cartoon continuity also includes ''WesternAnimation/{{Jem}}'', ''WesternAnimation/{{Inhumanoids}}'', and ''WesternAnimation/{{COPS}}''; most of these series all had cameos from Hector Ramirez, an in-universe news reporter and a [[NoCelebritiesWereHarmed takeoff on Geraldo Rivera]]. ''WesternAnimation/MyLittlePonyAndFriends'' was close to being in the same universe, due to ''WesternAnimation/MyLittlePonyTheMovie1986'' nearly including scenes where Firefly encounters Shipwreck of ''G.I. Joe'' (who was drunk) and Optimus Prime.

* In TheFifties, [[ComicBook/DisneyMouseAndDuckComics Disney Comics]] began to spread until the {{canon}} of the comic stories encompassed not only the regular Donald-Mickey-Silly Symphonies[[note]]The ''Silly Symphonies'' universe refers to Bucky Bug and the Three Little Pigs, mainly.[[/note]] melting-pot, but also several animated features by the studio, the most notably integrated into the canon being ''Film/SongOfTheSouth'', ''Disney/SnowWhiteAndTheSevenDwarves'' and ''WesternAnimation/{{Pinocchio}}''. It was later taken to ridiculous extents in TheSixties and TheSeventies, as the creators were beginning to run out of ideas. Aside perhaps of ''Snow White'', ''The Sword and the Stone'' and ''Song of the South'', the stories featuring such crossovers are very much CanonDiscontinuity, though some fans disagree with that decision of the company — they say that some of those stories were ''bad'', sure, but that they were bad because the writers didn't do their job, not because the crossover idea in itself was bad.

* In TheFifties, [[ComicBook/DisneyMouseAndDuckComics Disney Comics]] began to spread until the {{canon}} of the comic stories encompassed not only the regular Donald-Mickey-Silly Symphonies[[note]]The ''Silly Symphonies'' universe refers to Bucky Bug and the Three Little Pigs, mainly.[[/note]] melting-pot, but also several animated features by the studio, the most notably integrated into the canon being ''Film/SongOfTheSouth'', ''Disney/SnowWhiteAndTheSevenDwarves'' and ''Disney/{{Pinocchio}}''. It was later taken to ridiculous extents in TheSixties and TheSeventies, as the creators were beginning to run out of ideas. Aside perhaps of ''Snow White'', ''The Sword and the Stone'' and ''Song of the South'', the stories featuring such crossovers are very much CanonDiscontinuity, though some fans disagree with that decision of the company — they say that some of those stories were ''bad'', sure, but that they were bad because the writers didn't do their job, not because the crossover idea in itself was bad.