Crisis Crossover / Fan Works

• Cap-Force is basically a Capcom version of Marvel Comics' The Infinity War. A mysterious and powerful entity has caused most of the Capcom multiverse to become dust which nearly caused The End of the World as We Know It. Heroes from most of Capcom's franchises (Street Fighter, Darkstalkers, Mega Man X, Resident Evil, Devil May Cry, Final Fight, Phoenix Wright: Ace Attorney, Dead Rising, Power Stone, Rival Schools, Captain Commando, Ōkami, etc.) are brought together to combat this threat and hopefully undo the damage done to the multiverse.
• Coreline involves a tremendous amount of characters from various fictional sources (DC and Marvel Comics and Anime such as Neon Genesis Evangelion and cartoons like Inspector Gadget, to give examples) trying to deal with an Earth that has become a bunch of universes struggling for room a la Convergence and Secret Wars (2015).
• Hottie 3: The Best Fan Fic in the World and its sequels "Hottie 4: Even Better Sequel" and "Hottie 5: Fifty Shades of Epic".
• Mushroom Kingdom Fusion takes over a dozen video game mascots and puts them all into a single game.
• Sonic Generations: Friendship is Timeless: Chapter 1 has the Time Eater attacking both Sonic's world and Equestria, sending the characters through different moments of Sonic's past. The ponies must now work together with Sonic's friends to save both of their worlds.
• The Pony POV Series plays with this — all four generations of My Little Pony existed in the same timeline at different points (until the Alicorns and Draconequi erased G3 to prevent universal collapse), but they never actually meet up. Until the Final Battle of the Dark World timeline, when Twilight uses her connection with Minty Pie and the temporal paradoxes created by Nightmare Eclipse's "Groundhog Day" Loop plan to summon the G1, G2, G3 and G4 (pre-Reign of Chaos) mane casts in order to use multiple sets of the Elements of Harmony to defeat Eclipse and her Psycho Ranger Co-Dragons.
• This Victorious fanfic crossover wherein an united alliance, led by Maleficent, resurrects the three Ice Barrier Dragons (Brionac, Gungnir, and Trishula), all from YuGiOh, to attack numerous dimensions, and only the Chosen Ones (the actual Victorious gang), can stop them. Characters range from Disney Animated Canon, Descendants, Winx Club, Gravity Falls, Kung Fu Panda, Phineas and Ferb, Adventure Time, and The Fairly Oddparents.
• In this fanfic crossover sequel to Phineas and Ferb The Movie: Across the 2nd Dimension have the characters of Phineas and Ferb teaming up with characters from other franchises. such as My Little Pony: Friendship Is Magic, SpongeBob SquarePants, Sonic the Hedgehog, Marvel Universe and among others. for stop Dr. Heinz Doofenshmirtz, Plankton and villians from other universes from taking over the multiverse
• This fanfic is a shared universe for the Transformers and Marvel characters. while no official crossover have been written, Crisis Crossover stories are set to be written for conclude the Second and Third Phases of this fanfic.
• Multiversal Harmony is a rather unique example. It's a Massive Multiplayer Crossover of the universes of six different My Little Pony: Friendship Is Magic Alternate Universe Fics — The Lunaverse, The Dashverse, The Hasbroverse, The Manehattenverse, The Cadanceverse, and The Flipverse — in which the different Elements of Harmony from those universes are brought together on an adventure together.
• The Equestrian Wind Mage is a crossover between My Little Pony: Friendship Is Magic and The Legend of Zelda that increases in scope as the villains of Hyrule take notice of Equestria. This culminates in Season 3, when a permanent portal opens between both worlds, and Majora launches simultaneous attacks on them.
• Yu-Gi-Oh! Dissidia is a fairly blatant example given that it's Exactly What It Says on the Tin, being a crossover between its respective spin-offs. There are actually several fanfics like this, often done in the spirit of the Official crossover (see above).
• Beat the Drums of War brings together every Bait and Switch Original Character crew to date for the beginning of all-out war between The Alliance and the Iconians. The story is mainly told from the perspectives of Kanril Eleya and D'trel, with cameo appearances by Brokosh and Morgan t'Thavrau.
• Bring Me to Life features both the Scooby Gang and Angel Investigations teaming up to fight Jasmine and the First Evil.
• Shattered Skies: The Morning Lights brings together the Magical Girls of Sailor Moon, Cardcaptor Sakura, Pretty Cure, Lyrical Nanoha, and Puella Magi Madoka Magica to save reality.
• Mega Man Star Network brings together Mega Man Battle Network and Mega Man Star Force. As Cain and Hyde team up and form an evil time travelling organization. Starting with Cyber City and Wilshire Hills switching places.
• The Hours 'Verse brings together Persona 3, Persona 4 and Persona 5, while also occasionally featuring characters from Persona and Persona 2.
• The Ultimate Crossover Crisis Brawl is a crossover story that features characters from TV shows, video games and webcomics uniting for a stand after their worlds are attacked and wiped out one by one by a Big Bad with a personal grudge and an unknown motivation. Together, the big cast which contains characters from Keeping Up Appearances, My Name Is Earl, Deer Me, Night in the Woods, Seinfeld, Digger'' and many more planned out for the future fight not just to save and restore one world, but all worlds.
• Power Rangers:
  • "Restless Warriors" initially features Maya, Kelsey, Taylor, Dustin and Kira joining forces to oppose a demon invasion based on visions Maya has received from Trini's spirit and a prophecy in the Ninja Scrolls, but Eric, Tori and Conner soon join the group due to their bonds with Taylor, Dustin and Kira respectively, and the final battle brings in the other Yellow Rangers, from Aisha to Z.
  • While Crimson Rising focuses on Hunter Bradley learning his true history, all available Rangers up to Power Rangers Operation Overdrive join forces to oppose Ivan Ooze's latest invasion and his new villain army, even when some of them are rendered powerless and reduced to a 'support role'.
• Referenced in an omake of the Pokémon Reset Bloodlines sidestory "Gligarman Interlude". The titular hero is giving a lesson to the Night Watchers (a trio of Bloodliner superheroes), when suddenly, a portal opens up and out comes a being called Thomas T.H. Humba who tells them the universe has entered a period of crisis, and heroes are being recruited to save it, so the four of them immediately accept and go through the portal. The omake ends prompting the readers to check several essential comic book issues, including Blaziken Mask, Gligirl, The Black Arachnid, the Mighty Accelguard, among others.
• Infinity Crisis is a crossover between the Marvel Cinematic Universe and the Arrowverse where Thanos' use of the Infinity Stones dusts half the population of the entire multiverse, forcing Team Arrow, Team Flash, the Legends of Tomorrow, and Supergirl to team up with the Avengers to figure out a way to restore the balance. The sequels and spinoffs add even more into the fray, including The Orville, Merlin (2008), the DC Extended Universe, Doctor Who, and the most popular cartoon series of the 1980s.
• In Another Rainbow in Another Sky, it's mentioned that there's a civil war between the Dream Valley (G1), Friendship Gardens (G2), and Ponyville (G3) ponies.
• Multidimensional Dark Masters is a crossover between Tokimeki PokéLive! and TwinBee (It being a crossover between Pokémon, Love Live!, Tokimeki Memorial and Twinbee) and Wonder DigiIdolmaster (It being a crossover between Digimon, The Idolmaster and Wonder Momo) where the Dark Masters want to take over the PokéLive! and Digi-iM@s Earths by merging them and the Nijigasaki High Pokémon Trainer's Club and the 765Pro DigiDestined as well as their allies have to stop them from doing so.
• The Loki from Marvel Future Avengers and the Loki from Marvel Disk Wars: The Avengers team up in Marvel: Future Avengers x Disk Wars - Divided We Fall/United We Stand. Together, the pair defeat Annihilus. Taking over the entire Negative Zone. From which the pair plan to use his weapon, the Cosmic Control Rod to Mind Control the two versions of the Avengers from their respective worlds. Wherein the pair plan to attack the entire multiverse.

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