open/close all folders
G
- Galactic Shift Extend (BlazBlue and Ben 10)
- Galton's Children (Code Geass, Elfen Lied)
- Galvatron's Tiny Problem (She-Ra: Princess of Power, The Transformers)
- The Game (Wander over Yonder, Ratchet & Clank, and other downplayed franchises)
- Game of Touhou (Touhou Project, A Song of Ice and Fire)
- Gameplay (Persona 4, Durarara!!)
- The Games We Play (The Gamer, RWBY)
- Garfield and the Equestria Girls Series (Massive Multiplayer Crossover, primarily with Garfield and My Little Pony: Equestria Girls)
- GARO: SSBR of Makai (RWBY, GARO)
- Gatehammer Fantasy Battles (Warhammer, Gate)
- Gate: Thus the Dominion Fought There (Gate, StarCraft 2)
- A Gem in the Rough (Steven Universe, One Piece)
- Gems And Lanterns (crossover withGreen Lantern and Steven Universe)
- Gems Are Unbreakable (Steven Universe, JoJo's Bizarre Adventure)
- GETSU Tide (Bleach, One Piece)
- The Ghost Boy and the Combatants (DEATH BATTLE!, Western Animation, TV Series, Anime and Comic Books.)
- The Ghost, the Trickster and Molly McGee (crossover with The Ghost and Molly McGee and Avengers: Endgame)
- The Ghost Boy And The Super Girl (Danny Phantom, Justice League)
- Ghost in the Evangelion (Neon Genesis Evangelion, Ghost in the Shell, Serial Experiments Lain)
- Ghost Stories (Danny Phantom, The Avengers (2012))
- Ghost Story (The Dresden Files, Mass Effect)
- Ghoul Detective Series (Case Closed, Tokyo Ghoul, Animorphs, Attack on Titan, Fullmetal Alchemist, and Naruto)
- Ghoul Hunter (Tokyo Ghoul, One-Punch Man)
- girl in red (Harry Potter, Dungeons & Dragons)
- Global Order of Law and Defense (Genął, Cleopatra 2525, and X-Men, among others)
- Glorious Shotgun Princess (Mass Effect, Exalted)
- Go Gently (Worm, Welcome to Night Vale)
- Goin' KABOOM! (Danny Phantom, Animaniacs)
- Go Tell Aunt Rhody (Resident Evil 7: Biohazard, Total Drama)
- God of War - Not All Gods (God of War (PS4), Kid Icarus: Uprising)
- The Gods Awaken (The Owl House and Cthulhu Mythos)
- A Goddess Comes to Call (Bubblegum Crisis, Ah! My Goddess, several others)
- The God Empress of Ponykind (My Little Pony: Friendship is Magic, Warhammer 40,000
- God of Death (Warcraft, Warhammer 40,000)
- The God of Destruction comes to Remnant (RWBY, Godzilla, Jurassic World, The Land Before Time)
- God Slaying Blade Works (Fate/stay night, Campione!)
- Godzilla Goes to Hell... Again (Godzilla, Hazbin Hotel, Helluva Boss, and other Kaiju franchises)
- Going Native (Battlestar Galactica (2003), Star Trek: The Next Generation)
- Going Native (Ideas-Guy) (The DCU, Dragon Ball)
- Golden Age of the Sith (Harry Potter , Star Wars)
- Golden-Eyed Pixie Series (Heroes, The Twilight Saga)
- The Good Hunter (Bloodborne, Monster Girl Encyclopaedia)
- The Good, the Bad, and the Demon (Teenage Mutant Ninja Turtles (2012), Soul Hackers)
- Gospel of the Lost Gods (A Song of Ice and Fire, Worm)
- The Gotham Knights of Middle-Earth (Batman, Tolkien's Legendarium)
- Grand Tour Series (Ranma ˝, Star Trek, Magical Girl Lyrical Nanoha, Sailor Moon, many others)
- Gravity Soul (Gravity Falls Soul Eater)
- Gray Morality (The Familiar of Zero, Touhou'')
- The Great Disney Adventure Saga (Disney Animated Canon, Monsters, Inc., Pirates of the Caribbean, and cameos from various other disney products)
- The Great Escape (The Avengers, Sekirei)
- The Great Starship Battle (Doctor Who, Star Trek, Star Wars, Back to the Future, James Bond, The Hitchhiker's Guide to the Galaxy, etc.)
- Greg Veder VS The World (The Gamer, Worm)
- The Grim EDventures of Ed, Edd n Eddy (Ed, Edd n Eddy, The Grim Adventures of Billy & Mandy)
- The Grinning Snake (My-HiME, Hell Girl)
- Growth through Chaos (One Piece, Naruto)
- Guardians, Wizards, and Kung-Fu Fighters (Jackie Chan Adventures, W.I.T.C.H.)
- Guilty Crown: The Lost Kingdoms (Guilty Crown, Puella Magi Madoka Magica, YuYuGiDigiMoon)
- Gulch to Remnant (Red vs. Blue, RWBY)
- Gundam Agito Seed (Mobile Suit Gundam SEED, Gundam Build Fighters)
- The Gunslinger (Mugiwara N0 Luffy) (Goblin Slayer, Red Dead Redemption II)
- Gurren Jesus (Tengen Toppa Gurren Lagann, The Bible)
- Guyver Naruto (Guyver, Naruto)
H
- The Haddock Chronicles (Frozen, How to Train Your Dragon)
- Half & Half (No Country for Old Men, Tokyo Ghoul)
- The Half-Life of Element Zero (Mass Effect, Dragon Age)
- Halkegenia Online (The Familiar of Zero, Sword Art Online)
- Halkegenia Online Zero Hour (The Familiar of Zero, Sword Art Online)
- Halloween Unspectacular (various, including several Nicktoons, Gravity Falls, Steven Universe, and the Marvel Cinematic Universe)
- Halloween World (Buffy the Vampire Slayer Massive Multiplayer Crossover)
- The Hammer and the Rings (Halo, Warhammer 40,000)
- Hammerhand (Mass Effect, Warhammer 40,000)
- Hanging Ten Saga (Ben 10: Alien Force, Stōked)
- Harbinger (First Encounter Assault Recon, Mass Effect)
- Harbinger (Finmonster) (Danny Phantom, ParaNorman)
- Harmony's Warriors (My Little Pony Friendshipis Magic, Marvel Cinematic Universe)
- Harry and the Shipgirls (Harry Potter, KanColle)
- Harry Potter and the 7 Reincarnated Spirits (Harry Potter, Fairy Tail, Bleach, One Piece, Ranma ˝, Negima! Magister Negi Magi, Puella Magi Madoka Magica and Naruto)
- Harry Potter and the Alien Reality (Harry Potter, Stargate SG-1)
- Harry Potter and the Berserker (Berserk, Harry Potter)
- Harry Potter and the Boiling Isles, (The Owl House, Harry Potter)
- Harry Potter and the Cetra Heritage (Harry Potter, Final Fantasy VII)
- Harry Potter and the Endless Night (Harry Potter and Hellsing Ultimate Abridged)
- Harry Potter and the Ice Princess (Harry Potter, Frozen)
- Harry Potter And The Invincible Technomage (Harry Potter, Iron Man)
- Harry Potter and the Mystic Force (Harry Potter, Power Rangers Mystic Force)
- Harry Potter and the Not-Fatal-At-All Cultural Exchange Program (Fate/stay night, Harry Potter)
- Harry Potter and the Power of the Dark Side (Harry Potter, Star Wars)
- Harry Potter: Pokémon Master (Harry Potter, Pokémon)
- Harry Potter Shattered Prophecy (Dragon Age, Harry Potter)
- Harry Tano (Harry Potter, Star Wars)
- Has a Type (Scooby-Doo, The Weekenders, W.I.T.C.H., Mysticons, and Infinity Train)
- The Havoc Side of the Force (Harry Potter, Star Wars)
- Hazredous Interruptions (RWBY, Lyrical Nanoha)
- He's a Hero (My Hero Academia, One Piece, and Xenoblade Chronicles 3)
- Hear Me Roar (The Lord of the Rings, Game of Thrones)
- Hearts Are All as False as Stairs of Sand —Shakespeare (Harry Potter, Naruto)
- Heart of the Immortal (Ranma ˝, Blade of the Immortal)
- Heartless (Drich) (Kingdom Hearts, Digimon Tamers, Puella Magi Madoka Magica and Naruto)
- Heaven's Light (The Hunchback of Notre Dame (Disney), Tangled)
- Heimatfront: (Girls und Panzer, Company of Heroes, Fullmetal Alchemist, Attack on Titan)
- The Heirs to the Mantle (Inheritance Cycle, Halo)
- Heir to the Empire (Ranma ˝, Sailor Moon)
- Of Heists And Hustles (Sly Cooper, Zootopia)
- Hell Gate (Doom (2016), Gate)
- Hell Is a Martial Artist (Ranma ˝, Ah! My Goddess, with cameos from Sailor Moon and Negima! Magister Negi Magi)
- Hell's Boiling Point (The Owl House, Hellboy)
- Helluva Wizard (Harry Potter, Helluva Boss)
- Help from afar (Fullmetal Alchemist, Avatar: The Last Airbender)
- Herald (Worm) (Worm, Warhammer 40,000)
- Here be Dragons (Star Wars, Sword of the Stars)
- Here Be Monsters (Kid Icarus,The Incredibles,How to Train Your Dragon,RWBY,My Hero Academia,The Legend of Korra,Steven Universe)
- A Hero (Doctor Who, Puella Magi Madoka Magica)
- Hero Academia D×D (My Hero Academia, High School D×D)
- Heroes DxD: This is our story (My Hero Academia, High School D×D, Kingdom Hearts)
- "Heroes" Series (primarily a crossover with the Marvel Cinematic Universe, Arrowverse, Tolkien's Legendarium, Merlin (2008), the DC Extended Universe, and many others)
- Heroes Assemble! (Marvel Cinematic Universe, Harry Potter)
- Heroes and Villains (Frozen, Dr. Horrible's Sing-Along Blog, Buffy the Vampire Slayer)
- Heroes, Dreams, and Destiny (Fate/stay night, RWBY)
- The Heroes of Time (Kingdom Hearts, Hanna-Barbera)
- A Heroic Avenger (Is It Wrong to Try to Pick Up Girls in a Dungeon?, Fate/Grand Order)
- Heroic Myth (Is It Wrong to Try to Pick Up Girls in a Dungeon?, Fate/Grand Order)
- Her Shadowed Realm (Jackie Chan Adventures, Yu-Gi-Oh!)
- Hers Is the Fury (A Song of Ice and Fire, Ward)
- The Hidden Empire Series (Harry Potter , Star Wars)
- Highschool Dragon (My Little Pony: Friendship is Magic, High School D×D)
- The Hill of Swords (Fate/stay night, The Familiar of Zero)
- Hinata Ends With The Soul Calibur (Love Hina, Soul Caliber, Disgaea, The World Ends with You, Sherlock Holmes, Pokémon)
- History's Strongest Shinobi (Naruto, Kenichi: The Mightiest Disciple)
- Hive Daughter (Worm, Warhammer 40,000)
- Holding Back the Sea (Fate/Zero, Percy Jackson and the Olympians)
- Honoka's Bizarre Adventure (Jojos Bizarre Adventure,Love Live!)
- Hottie 3: The Best Fan Fic in the World
- Housemates (Being Human, Thor, The Avengers (2012))
- The House of Elendil (The Lord of the Rings, Game of Thrones)
- House Party (Sonic the Hedgehog, My Little Pony: Friendship is Magic, Sausage Party, and others)
- How Akuma Kicked Christmas' Ass (Capcom fighting games)
- How the Light Gets In (Arrow, Supernatural, and a little bit of The Flash (2014).)
- However Improbable (Sherlock Holmes, Star Trek: The Original Series)
- How To Drill Your Way Through Your Problems (Worm, Tengen Toppa Gurren Lagann)
- Hunted Tribes (Battlestar Galactica (2003), BattleTech)
- Hunters of Death (Pacific Rim, Mass Effect)
- Hunters of Justice (RWBY,The DCU)
- Hunter Then Hunted (Toriko, Ward)
- Hunter (UnwelcomeStorm) (Bloodborne, Worm)
- hush now, little one (Encanto, Turning Red)
- Hybrid Theory (many Anime, Manga and Games ranging from Ranma ˝, Sailor Moon, Rival Schools and Street Fighter to Resident Evil, Hellsing, Revolutionary Girl Utena, Blue Seed and Guyver)
I
- I Ain't Afraid of No Ghosts (Kung Fu Blaziken) (Danny Phantom, Extreme Ghostbusters)
- I Against I, Me Against You (Red vs. Blue, My Little Pony: Friendship is Magic)
- I am Superman (Worm, The Iron Giant)
- I Don't Want to Get Hurt, so I'll Become the Ultimate Defensive Hero (Bofuri: I Don't Want to Get Hurt, so I'll Max Out My Defense., My Hero Academia)
- I Just Love Killin' (Rick and Morty, Worm)
- Ice Fury (How to Train Your Dragon, Frozen)
- If Wishes Were Ponies (My Little Pony: Friendship is Magic, Harry Potter)
- Imaginary Seas (Fate/Grand Order, Percy Jackson and the Olympians)
- I'm Nobody (Kingdom Hearts, Mass Effect)
- Imperator (Bravely Second, Worm)
- The Impossible She Hulk (Kim Possible, She-Hulk)
- Inaccurate Legends (Fate/stay night, Monty Python and the Holy Grail)
- In an Instant (Avengers: Infinity War, Steven Universe)
- Incarnation of Legends (Fate/Grand Order, Is It Wrong to Try to Pick Up Girls in a Dungeon?)
- In Flight (Fate/stay night, Sekirei)
- The Infinite Loops (Ah! My Goddess, Ranma ˝, Harry Potter, Naruto, Bleach, Digimon, My Little Pony: Friendship is Magic, and Everything Else!)
- Infinity Crisis (Avengers: Infinity War, Arrowverse, et all)
- Infinity Legion: Heroes Unite (Max Steel, Danny Phantom, My Life as a Teenage Robot, Randy Cunningham: Ninth Grade Ninja, Sym-Bionic Titan, Kim Possible, American Dragon: Jake Long, Generator Rex, The Secret Saturdays, El Tigre: The Adventures of Manny Rivera, Miraculous Ladybug, Star vs. the Forces of Evil, Samurai Jack and Penn Zero: Part-Time Hero)
- Infinity Train: Blossomverse
- Infinity Train: Blossoming Trail (Infinity Train, Pokémon, Silent Hill)
- Infinity Train: Voyage of Wisteria (same as above minus Silent Hill)
- Infinity Train: Knight of the Orange Lily (Infinity Train, Pokémon, Yu-Gi-Oh! VRAINS)
- Infinity Train: Court of Cyclamen
- Infinity Train: Boiling Point (Infinity Train, The Owl House)
- Infinity Train: Crown of Thorns
- Infinity Train: Star Finder (Infinity Train,The Loud House)
- Infinity Train: Wake Me Up
- Infinity Train Book SU Gem Shards (crossover Infinity Train and Steven Universe)
- Infinity Train: Freezing Point (The Owl House, Infinity Train)
- Infinity Train Grace And The Angry Glitch Tech (crossover Glitch Techs and Infinity Train)
- Infinity Verse (Ohhh so many. Includes Kim Possible, Danny Phantom, SheZow, Randy Cunningham: Ninth Grade Ninja, Miraculous Ladybug, American Dragon: Jake Long, My Life as a Teenage Robot, Gravity Falls, Gargoyles, Code Lyoko, Transformers, Godzilla, Villainous, Teenage Mutant Ninja Turtles (2012), G.I. Joe, Alien, Predator, Friday the 13th, Jurassic Park, Elfen Lied, Black Lagoon, Black Butler, Power Rangers, Scooby-Doo and the Ghoul School, Sailor Moon, Storm Hawks, The Powerpuff Girls, Mortal Kombat, Street Fighter, Penn Zero: Part-Time Hero, Steven Universe, Hellsing & RWBY)
- Inglorious Bosh'tets (Mass Effect, The Legend of Zelda, Star Fox, Warhammer 40,000, Norse Mythology, Finnish Metal and a host of others)
- Project Gethinator (set in the same Bizarro Universe as the previous fic)
- Inheritance of Cards and Demons (Blue Exorcist, Cardcaptor Sakura)
- Innocence and Experience (pre-New 52 Batman universe with Young Justice (2010))
- The Inquisitor (Warhammer 40,000, Young Justice (2010))
- The Institute Saga (Superman/X-men Evolution crossover)
- Instruments of Time (a lot of stuff)
- Intelligence Factor (Pokémon and Star Trek: Deep Space Nine)
- The Interference (Kingdom Hearts, Fullmetal Alchemist, Chrono Trigger, Jak and Daxter)
- Intergalactic No Fault Collisions (Star Wars, Worm)
- Interventions (Buffy the Vampire Slayer, Heroes, minor crossover moments with Doctor Who and Torchwood).
- In the Shadow of Gods (Mass Effect, Halo)
- In Times of Trouble (Supernatural, Thor, Star Trek: The Next Generation)
- Iron Hearts (Warhammer 40,000, My Little Pony: Friendship is Magic)
- Iron Hero 7 (crossover with Iron Man and Big Hero 6)
- IS and Sekirei Brave New World (Sekirei, Infinite Stratos)
- It Must Be Tuesday (Fallout, My Little Pony: Friendship is Magic)
- Itachi, Is That a Baby? (Harry Potter, Naruto)
J
- Jade Cobra (Jackie Chan Adventures, G.I. Joe)
- The Jaded Eyes Series (Harry Potter, Hellsing, The Vampire Chronicles, Gargoyles, others)
- Jaune Arc, Lord of Hunger (RWBY; Star Wars, specifically Knights of the Old Republic II: The Sith Lords)
- Jedi Harris (Buffyverse, Star Wars, Stargate-verse, many more)
- Jigsaw Versus The Punisher (The Punisher, Saw)
- Joffrey from Game of Thrones Is Replaced with Octavian from Rome (A Song of Ice and Fire, Rome)
- JoJo's Alien Adventure (Ben 10, JoJo's Bizarre Adventure)
- Joseph Joestar: Hamon Hunter (RWBY, JoJo's Bizarre Adventure)
- Just an Unorthodox Thief (Fate/Zero, Lupin III)
- Justice (One Piece, Justice League)
- Justice League of Equestria (The DCU, My Little Pony: Friendship is Magic)
- Justice League of Equestria: Gods and Monsters (The DCU, My Little Pony: Friendship is Magic)
- Justice League: The Spider (Ultimate Marvel and DC Animated Universe, specifically Spider-Man and Justice League)
- Justice League: Thunderer (The Mighty Thor, Justice League)
- The Justice of a Tech-Priest (Warhammer 40,000, Young Justice (2010))
- Justice Society of Japan (The DCU, Tengen Toppa Gurren Lagann, Code Geass, Fate/stay night, Xenoblade Chronicles 1, Final Fantasy XIII, Neon Genesis Evangelion, Kingdom Hearts, Paranoia Agent, Fullmetal Alchemist, Puella Magi Madoka Magica, and countless others)
- Just Joking (Batman, My Little Pony: Friendship is Magic)
- J-WITCH Series (Jackie Chan Adventures, W.I.T.C.H.)
K
- Kabbalah: The Passive Conqueror (Fate/Grand Order, Date A Live)
- Kage (Jackie Chan Adventures, W.I.T.C.H.)
- Kamen Rider Coronet (Kamen Rider, Pokémon)
- Kamen Rider Days (Kamen Rider, School Days)
- Kamen Rider GX (Kamen Rider, Yu-Gi-Oh! GX)
- Kamen Rider Kuuga: Rising unto the Stars (Kamen Rider Kuuga, Pretty Cure)
- Kamen Rider OOO: The Metals of Ikki Tousen (Kamen Rider, Ikki Tousen)
- Kamen Rider Showa (Kamen Rider, Higurashi: When They Cry)
- Kamen Rider Zero-One: Edge of Dawn (Fire Emblem: Three Houses, Kamen Rider Zero-One)
- Kanius Production Abridged (YuYuGiDigiMoon, Digimon Fusion Kai, Guilty Crown: The Lost Kingdoms, Digimon Accel Stream, Various Anime and other popular culture)
- Kazuma V Tanya (Mistborn: The Original Trilogy, KonoSuba, The Saga of Tanya the Evil)
- Keeper of Terror (Diablo, RWBY)
- Kelly The Roman Warrior (Godzilla, Dracula, Harry Potter, Shrek, Hercules, Marvel Cinematic Universe, The Lord of the Rings'')
- The Ketsueki Quadrilogy (Mortal Kombat, Street Fighter, Tekken, Soul Series)
- The Keys of the Kingdom (Negima! Magister Negi Magi, Kingdom Hearts, Batman, Deadpool, Sailor Moon, Final Fantasy VII, Alice's Adventures in Wonderland, The Little Mermaid, Darkwing Duck, Fate/stay night, To Love Ru, Chip 'n Dale: Rescue Rangers, Toy Story, Neon Genesis Evangelion, UQ Holder!, etc. The list goes on and on.)
- Kimi No Na Iowa (KanColle, Your Name)
- Kim Possible: Axess Hero (MegaMan NT Warrior and Kim Possible)
- Kindred (Disney Princess)
- Kings and Khans (The Lion King, The Jungle Book (1967), Tarzan))
- Kingdom Crossovers (Kingdom Hearts, Invader Zim, Calvin and Hobbes, Planescape: Torment, and many more)
- Kingdom Hearts: Cody's Story (Kingdom Hearts, Total Drama)
- Kingdom Hearts: Grand Order (Kingdom Hearts, Fate/Grand Order)
- Kingdom Hearts: The Third Epic (Massive Multiplayer Crossover with Kingdom Hearts, Dragon Ball Z, Zoids, Mobile Suit Gundam SEED, and lots more.)
- The King Is Dead (World of Warcraft, A Song of Ice and Fire)
- King of Souls (Fate/Zero, Persona 3)
- King of Thrones (A Song of Ice and Fire, Yu-Gi-Oh!, with elements from Game of Thrones)
- King of the Monsters (Godzilla, Pacific Rim)
- Kings of Revolution (Lyrical Nanoha, Code Geass)
- Kill or Be Killed (Girls' Generation, Super Junior)
- Kir-Ben 10: Poyo Force (Ben 10: Alien Force, Kirby)
- Kiss Me You Animal (The Beatles, Big Brother, Warrior Cats, and others)
- Kitsune On Campus (Naruto, Negima! Magister Negi Magi)
- The Knight and Fairy of the Forward unto Dawn (Halo, Game of Thrones)
- The Knights of Earth (Code Geass, Mobile Suit Gundam Age)
- Knight of Lolicon (Twenty-six different fandoms)
- Knight of Death and Rebirth (Code Geass, Monster Girl Encyclopedia)
- A Knight's Tale as Inquisitor (Dragon Age: Inquisition, Fate/Zero)
- Knight Templar School (X-Men: Evolution, The DCU, Marvel Universe)
- Know Thyself: the Prelude (Harry Potter, The Matrix)
- Kouja No Senshi (Massive Multiplayer Crossover with Sailor Moon, Teknophage, and others)
- Kur and the Crown (Danny Phantom, The Secret Saturdays)
- Kyon: Big Damn Hero (Haruhi Suzumiya, TV Tropes, Higurashi)
L
- Ladybird (Worm) (My Little Pony: Friendship is Magic, Worm)
- Ladybug in a Half Shell (Miraculous Ladybug,Teenage Mutant Ninja Turtles (2012))
- Land of No Color (Pokémon, Digimon)
- Lantern Prime (Transformers, Green Lantern)
- Larry Boy and the Little Man of Purpleness (Star Wars, VeggieTales)
- Last Child of Krypton (Superman, Neon Genesis Evangelion)
- The Last Connor (Alien, Terminator)
- The Last Daughter (Superman, Worm)
- The Girl of Tomorrow: Rewrite.
- The Last Lion of House Reyne (Harry Potter, A Song of Ice and Fire)
- Last Mage of Krypton (Harry Potter, Superman)
- The Last Son (Superman/DC Comics, X-Men: Evolution/Marvel)
- The Last Spartan (Halo, Mass Effect)
- Leaf (The Cosmere, The Stormlight Archive, Worm)
- Learning from the best (whether you want to or not) (The Incredibles, Miraculous Ladybug)
- Legacy Of The Enginseers (Worm, Warhammer 40,000)
- Legacy of the Red Sun (Star Wars, Superman)
- Legacy (Sekiro/Kimetsu no Yaiba) (Sekiro: Shadows Die Twice, Demon Slayer: Kimetsu no Yaiba)
- Legendary Adventurers, Futuristic Saviors (Princess Mononoke, Inuyasha, Nausicaä of the Valley of the Wind, Howl's Moving Castle, Earthsea, Castle in the Sky, Godzilla, The Incredible Hulk and even Ferngully The Last Rainforest)
- Legendary Spider-Man (The Legend of Korra, Spider-Man)
- Legendary Spider-Girl (The Legend of Korra, Spider-Man)
- The Legend of Eevee (The Legend of Zelda, Pokémon)
- The Legend of Gobber the Belch (Brave, How to Train Your Dragon)
- The Legend of Ruby (RWBY, Avatar: The Last Airbender/The Legend of Korra)
- Legend of the Spider-Man (The Legend of Korra, Spider-Man)
- Legend of the Spider-Man: Reign (The Legend of Korra, Spider-Man: Reign)
- Lelouch of the Wings of Rebellion (Code Geass, Persona 5)
- Lethal Species (Buffy the Vampire Slayer, Alien)
- Lethal Job (crossover with Spider-Man and Inside Job (2021))
- The Life Is A Game Multiverse (Harry Potter, Marvel vs. Capcom, Mass Effect, Naruto, and many more)
- Life Ore Death (Young Justice (2010), Mistborn: The Original Trilogy)
- Light and Dark (Danny Phantom, Young Justice (2010))
- Light at the End (Metro: Last Light, RWBY)
- Lighting Candles (Big Hero 6, Rise of the Guardians)
- The Lightning Strike (Marvel Cinematic Universe, Harry Potter)
- Like Dreamers Do (Wreck-It Ralph, TRON, Disney Animated Canon)
- The Lion, The Witch, and The Fairy's Tail (Fairy Tail, The Chronicles of Narnia)
- Liquid Sample ([PROTOTYPE], The Familiar of Zero'')
- Little Black Death Note (Harry Potter, Death Note)
- The Little Foreigner (Worm, Fate/Grand Order)
- The Little Hitchhiker (The Haunted Mansion, Disney Theme Parks, The Little Mermaid, Song of the South, Hercules, Monsters, Inc.)
- The Little Pony Legend (My Little Pony: Friendship is Magic, The Legend of Korra with some elements from the Disney Animated Canon as well.)
- LMS (BIONICLE, LEGO Space, Rock Raiders)
- The Little Stark (The Little Mermaid, Iron Man)
- The Lonely Dragacorn (Wreck-It Ralph, Skylanders)
- The Long Road (Rise of the Guardians, How to Train Your Dragon)
- The Longest Hunt (Bloodborne, RWBY)
- The Looney Scientists Show (Kim Possible, King Arthur's Disasters, Phineas and Ferb, Recess)
- The Lost and the Damned (Fallout 3, Warhammer 40,000)
- The Lost Child Of Azarath (Teen Titans, Doctor Who)
- Lost in Camelot series (Lost Girl, Merlin)
- lost in the infinite lights (Yu-Gi-Oh!, My Hero Academia)
- Lost in the Woods & sequel (Star Trek: The Next Generation, Firefly)
- Lost to Dust (RWBY, Fate/Grand Order)
- A Loud Among Demons (The Loud House Helluva Boss)
- Loud Ed Drama (Total Drama with Ed, Edd n Eddy and The Loud House)
- The Loud House: Revamped (The Loud House, Massive Multiplayer Crossover)
- Loud Techs (The Loud House, Glitch Techs)
- Louds vs. the Forces of Evil (The Loud House, Star vs. the Forces of Evil)
- Love at First Sight (Once Upon a Time) (Once Upon a Time, Mr. Right)
- Lovehammer (Sailor Moon, Warhammer 40,000)
- Lovehammer Inc (Sailor Moon, Warhammer 40,000)
- Love Hina Double Trouble (Love Hina, Kamen Rider, School Days, Higurashi: When They Cry)
- Love Is All You Need to Destroy Your Enemies (The Dresden Files, Welcome to Night Vale)
- Loves Heartstrings (Hannah Montana, Kung Fu Panda)
- L.O.V.E vs. H.A.T.E (Massive Multiplayer Crossover)
- Love Worth Waiting For (Frozen, Mulan)
- Lulu's Bizarre Rebellion (Code Geass, JoJo's Bizarre Adventure)
- Lyrics of Sorrow (Castlevania, Lyrical Nanoha)
M
- Madhouse (Trexmaster) (Pokémon, Team Fortress 2)
- Mad World (Invader Zim/Johnny the Homicidal Maniac)
- Magicae Est Potestas (Artemis Fowl, Undertale)
- Magical Girl Convergence (Buddy Complex, Day Break Illusion, Izetta: The Last Witch, Lyrical Nanoha, Puella Magi Madoka Magica, Sailor Moon (Sailor Moon R/Black Moon Arc), Strike Witches, Vividred Operation, Yuki Yuna is a Hero)
- Magical Girls Unite Retransformed (Puella Magi Madoka Magica and almost every other Magical Girl story in existence)
- Magical Girl Lyrical Nanoha: AvengerS (Lyrical Nanoha, Marvel Cinematic Universe)
- Magical Girl Lyrical Taylor (Worm), (Magical Girl Lyrical Nanoha)
- Magical Pony Lyrical Twilight (Lyrical Nanoha, My Little Pony: Friendship is Magic)
- Magical Troubleshooting Crossover Fighting Federation Ultra (Ranma ˝, Slayers, Street Fighter, Final Fantasy VII, The Kingof Fighters, Neon Genesis Evangelion, Tenchi Muyo!, others)
- Magic and Mayhem (Casper, Hocus Pocus)
- Magic Kingdoms (Disney Animated Canon,Snow White and the Seven Dwarfs, Aladdin)
- The Magic of Torchwood (Torchwood, Doctor Who, Harry Potter)
- A Man Like No Other (The Hunger Games, The Avengers (2012), The 100).
- A Man of Iron (Game of Thrones/A Song of Ice and Fire, Marvel Universe)
- Man off the Moon (Fate/EXTRA, Mass Effect)
- The Man Who Sold the World (Bloodborne-centred Massive Multiplayer Crossover)
- The Man with No Name (Firefly, Doctor Who)
- Mandie's New Target (The Fairly OddParents!, Danny Phantom)
- The Many Dates of Danny Fenton (Danny Phantom-centric Massive Multiplayer Crossover)
- The Many Worlds Interpretation (The Big Bang Theory, Discworld)
- Maple Sugar Pretty Cure (Futari wa Pretty Cure, Turning Red)
- March of the Inevitable (Warhammer, Dragon Age)
- Mare Genius (Girl Genius, My Little Pony: Friendship is Magic)
- Marevel Alternate Universe (Marvel Cinematic Universe, My Little Pony: Friendship is Magic)
- Maribat AU (Batman, Miraculous Ladybug)
- Mario and Sonic: Heroes Unite! (Super Mario Bros., Sonic the Hedgehog)
- The Marvelous World Of DC (Marvel Comics, The DCU Vertigo Comics, Image Comics, Dark Horse Comics, and Harry Potter)
- Marvelous Little Ponies Universe (Marvel Cinematic Universe, Spider-Man, My Little Pony: Friendship is Magic)
- Mass Effect: Bionicle Revolution (Mass Effect, BIONICLE)
- Mass Effect: Clash of Civilizations (Halo, Mass Effect)
- Mass Effect Co OPA Voyage To The Galaxy (Mass Effect, Voyage)
- Mass Effect: Human Revolution (Deus Ex: Human Revolution, Mass Effect)
- Mass Effect The Equestrian Equation (Mass Effect, My Little Pony: Friendship is Magic)
- Mass Foundations
- Redemption in the Stars (Mass Effect, Fallout)
- All the World's a Stage (Doctor Who, Fallout, Soul Series)
- The Master of Death (Harry Potter, The Dresden Files)
- Master Potter of Kamar-Taj (Harry Potter, Doctor Strange (2016))
- The Matrix Rewinds (Life Is Strange, The Matrix)
- Max Wolf Revolutions (Pokémon, Avatar, Darkstalkers, others)
- Maybe I'm a Lion (The Garden of Sinners, [PROTOTYPE])
- Megami no Hanabira (Shin Megami Tensei, Sono Hanabira ni Kuchizuki Wo (a Girls' Love Visual Novel series))
- Megamix Tournament (Tournament-styled Massive Multiplayer Crossover)
- Meloetta: Melody of Discord (Pokémon, My Little Pony: Friendship is Magic, Vocaloid)
- Memories of Iron (Iron Man, Worm)
- Menburen no Tsuinzu (Ratchet & Clank, Kingdom Hearts)
- The Mermaid and the Genie (Aladdin, The Little Mermaid)
- Metastability (RWBY, Red vs. Blue)
- MIA (Gravitys Rainboom) (Halo, My Little Pony: Friendship is Magic)
- The Midnightverse: Too Huge to Be True (Chip 'n Dale: Rescue Rangers, TaleSpin), Lost and Found (Chip 'n Dale: Rescue Rangers, The Rescuers, Mrs. Frisby and the Rats of NIMH), Diamonds in the Desert (Chip 'n Dale: Rescue Rangers, Chip 'n Dale)
- A Midsummer Night's Dream (Killbles) (My Little Pony: Friendship is Magic, Pacific Rim)
- Mighty Morphin Mecha Rangers! (Neon Genesis Evangelion, Tengen Toppa Gurren Lagann, The Big O, Zoids, Vision of Escaflowne, Yu-Gi-Oh!, Transformers, FLCL, Megas XLR, Code Geass, Call of Duty, Read or Die, others)
- The Minkiad (Boy Meets World, Girl Meets World)
- Miraculous Escalation (Miraculous Ladybug, Worm)
- Miraculous Knight (Batman, Miraculous Ladybug)
- Miraculous Ladybug vs. the Forces of Evil (Miraculous Ladybug, Star vs. the Forces of Evil)
- Miraculous Ninja (Miraculous Ladybug, Randy Cunningham: Ninth Grade Ninja)
- The Misery Senshi Neo-Zero Double Blitzkrieg Debacle (Sailor Moon, Daria, Beavis And Butthead)
- The Misfits (Walker) (Dragon Ball, Breath of Fire II, Mobile Suit Gundam Wing, EarthBound (1994), Real Life, others)
- The Misfits Series (X-Men: Evolution, G.I. Joe: A Real American Hero)
- The Mission Stays the Same (Mass Effect, Warhammer 40,000)
- Mitraka (Gor, A Song of Ice and Fire, The Witcher, Star Wars, The Sword of Truth, Dragon Age: Inquisition)
- MLP Xenoverse (My Little Pony: Friendship is Magic, Dragon Ball Xenoverse)
- Monkey and Butterfly (One Piece, Star vs. the Forces of Evil)
- The Monkey D. Haru Series (Harry Potter, One Piece)
- Mononofu (Touken Ranbu, Onmyōji (2016))
- Monsters In Paradise (Pokémon, Touhou Project)
- Monsters of My Own (Pokémon, Young Justice (2010))
- Monsters Versus Aliens (Lilo & Stitch, Monsters, Inc.)
- The Moon's Flash Princess (Sailor Moon, Sword Art Online)
- More than Meets the Eye (Ultimate Marvel, Transformers)
- Morgan Freeman's Blessings on this Beautiful Hood! (The Boondocks, KonoSuba)
- Morphin Fate (Fate/Zero, Power Rangers, Kamen Rider Decade)
- Mortal Draw, Dragon's Breath (Sekiro: Shadows Die Twice, Demon Slayer: Kimetsu no Yaiba)
- Mortal Kombat vs Marvel Universe (Mortal Kombat, Marvel Universe)
- Mortal Kombat vs. The Owl House (Mortal Kombat, The Owl House)
- The Mountain and the Wolf (A Song of Ice and Fire/Game of Thrones, Warhammer Fantasy)
- MRA Trilogy (Frozen, Mass Effect, The Land Before Time and many, many more)
- Multiversal Constants (Young Justice (2010), Super Sons)
- The Multiverser Saga (Young Justice (2010), Neptunia, The League of Extraordinary Gentlemen and others)
- The MUSHU-Verse (Western Animation Massive Multiplayer Crossover)
- Mutants And Heroines (DC Super Hero Girls 2019, Rise of the Teenage Mutant Ninja Turtles)
- Mutant Storm (Harry Potter, X-Men)
- Muv-Luv: DYRL (Muv-Luv Alternative, Macross Frontier)
- My Bloody Academia (Kill la Kill, My Hero Academia)
- My Driver Academia (My Hero Academia, Xenoblade Chronicles 2)
- My Hero Academia: Unchained Predator (My Hero Academia, Doom (2016))
- My Hero Playthrough (My Hero Academia, The Gamer, Sailor Moon, others)
- My Hero Pokedamia (My Hero Academia, Pokémon)
- My Hero School Adventure Is All Wrong As Expected (My Hero Academia, My Youth Romantic Comedy Is Wrong, as I Expected)
- My Heroes Reborn (My Hero Academia, One Piece, Naruto, Fairy Tail, Ranma ˝, My Little Pony: Friendship is Magic, others)
- My Huntsman Academia (RWBY, My Hero Academia)
- My Ideal Academia (Fate/stay night, My Hero Academia)
- My Little Animaniacs (My Little Pony: Friendship is Magic, Animaniacs)
- My Little Castlevania, (My Little Pony: Friendship is Magic, Castlevania)
- My Little Caboose: Blue is Magic! (My Little Pony: Friendship is Magic, Red vs. Blue)
- My Little Community Friendship Is Awesome (My Little Pony: Friendship is Magic, Community)
- My Little Denarians (My Little Pony: Friendship is Magic, The Dresden Files)
- My Little HetaStuck MSTs (My Little Pony: Friendship is Magic, Homestuck, Hetalia: Axis Powers, Harry Potter)
- My Little Pirates: Luffy's Adventures in Equestria (My Little Pony: Friendship is Magic, One Piece)
- My Little Pony: Nakama Is Magic (My Little Pony: Friendship is Magic, One Piece)
- My Teen Romantic Comedybecamean Isekai Historical Fantasy (My Youth Romantic Comedy Is Wrong, as I Expected), (Romance of the Three Kingdoms)
- The Myth of Link & Zelda: Survivors of the Calamity (The Legend of Zelda, Marvel Cinematic Universe, DC Extended Universe, Super Mario Bros.).
- Breath of the Wild is the first story.
- Age of Calamity is the second story.
- My Trans Dimensional Overpowered Protagonist Harem Comedy Is Wrong (Is It Wrong to Try to Pick Up Girls in a Dungeon?, My Youth Romantic Comedy Is Wrong, as I Expected)
- My Wizarding Academia (My Hero Academia, Harry Potter)
- My Venom Academia: Symbiote's Justice (My Hero Academia, Venom (2018))
- My(stara's) Little Ponies: Friendship Is Adventuring (My Little Pony: Friendship is Magic, Mystara)
- Mythos Effect (Mass Effect, CthulhuTech)
N
- Nack and Psycho (Massive Multiplayer Crossover with Sonic the Hedgehog, Who Framed Roger Rabbit, and others)
- Nanoha Genesis Evangelion (Lyrical Nanoha, Neon Genesis Evangelion)
- Nanosuits And Soul Magic (Crysis, RWBY)
- Narnia and the North (The Chronicles of Narnia, Game of Thrones)
- Naruto the Shinobi Shaman of Konoha (Naruto, Shaman King)
- National Anthem (Fusion Fic/conceptual crossover between Super Smash Bros. and The Hunger Games)
- Necessary to Win (Girls und Panzer, Saki)
- The Necromancer (The Lord of the Rings, Once Upon a Time)
- Neither a Bird nor a Plane, it's Deku! (My Hero Academia, DC Comics)
- Neon Genesis Evangelion Senshi No Michi (Street Fighter, Neon Genesis Evangelion)
- Neon Genesis Madoka Magica (Neon Genesis Evangelion, Puella Magi Madoka Magica, potential Massive Multiplayer Crossover.)
- The Newest Challenger (Naruto, Street Fighter)
- New Game, New life (Ranma ˝, The Gamer, Sailor Moon, Campione!, Inuyasha, Kenichi: The Mightiest Disciple, Variable Geo, Ah My Buddha, Demon Slayer: Kimetsu no Yaiba)
- The New Lives Saga (Sailor Moon, Pokémon, Zatch Bell!, One Piece, Ranma ˝, Naruto)
- New Stars (Star Wars: The Clone Wars and The Orville)
- New Vegas Showtime (Fallout: New Vegas and Persona 5)
- A New World, A New Way (Pokémon, My Little Pony: Friendship is Magic)
- New World Blues (Fallout: New Vegas, RWBY)
- Next Grand World (Fate/Grand Order, Kamen Rider Zi-O)
- Nexus (Transformers: Prime/ Devil May Cry)
- The Night Unfurls (Bloodborne, Kuroinu: Kedakaki Seijo wa Hakudaku ni Somaru)
- Nights End, Days Begun (Worm, My Hero Academia)
- NiGHTS: Quatro Facets of Dreams (NiGHTS into Dreams…, Coraline, Spooky Month, Gravity Falls, and Undertale)
- The Nightmare Before Hogwarts (Harry Potter, The Nightmare Before Christmas)
- Nightmare in Arkham (Batman, A Nightmare on Elm Street )
- No one Escapes...Redemption?? (Dead by Daylight, Hazbin Hotel)
- The Nobody of Ever After High (Kingdom Hearts, Ever After High)
- Noah Maxwell Takes A Little Trip Here (RWBY, The Slender Man Mythos)
- Nobody Expects The Shinobi Inquisition (Naruto, Dragon Age)
- No Chance for Fate (Ranma ˝, Sailor Moon)
- No Gods, Only Guns (Mass Effect, Borderlands)
- NoHoper (Death Note, The House of Night)
- No Need For Destiny (Ranma ˝, Sailor Moon, Naruto, Ah! My Goddess, Slayers, Tenchi Muyo!, Yu-Gi-Oh!, Grenadier)
- No Need for Titles (Frozen, How to Train Your Dragon'')
- No Plumbers Allowed (Super Mario Bros., Worm)
- Nothing is Impossible (Kim Possible, Jackie Chan Adventures, The Powerpuff Girls and My Life as a Teenage Robot)
- Nothing Is True (Assassin's Creed, The 100)
- Not the intended use (Zantetsuken Reverse) (Castlevania, Shin Megami Tensei)
O
- The Odyssey Resurgence (Stargate SG-1, Independence Day: Resurgence)
- Of Crystal Shards and Dust (RWBY, Final Fantasy XV)
- Of Elder Scrolls and Huntsmen: Dragon Rose (RWBY, The Elder Scrolls)
- Official Fanfiction University (any fandom with one)
- Of Gods And Men (Death Note, Harry Potter)
- Of Lovebugs And Promises (White Collar, Marvel Cinematic Universe)
- Of Quirks and Magic (My Hero Academia, Marvel Comics)
- Of State (How to Train Your Dragon, Frozen)
- Oh Good Hunter (Worm, Bloodborne)
- Okron Tournament (Tournament-Style Massive Multiplayer Crossover)
- Old Meets New (original continuity Scooby-Doo and new Scooby-Doo! Mystery Incorporated )
- Olivia Goes West (The Great Mouse Detective, An American Tail)
- Omni Evolution (Ben 10, X-Men: Evolution)
- The Omnitrix Hero (My Little Pony: Equestria Girls, Ben 10)
- The Omniverse Event (Calvin and Hobbes, Yu-Gi-Oh!, Star Trek: Voyager, Bernice Summerfield, many more planned)
- On a Backwater Planet, a Commander Builds a Metal Extractor (Commander, Planetary Annihilation)
- On a Clear Day You Can See Forever, (Ranma ˝, Sailor Moon, Ah! My Goddess)
- On the Illusion of Might (Halo, Mass Effect)
- On the Run (Smallville, The Fast and the Furious)
- Once Upon A Shooting Star (Rock Band/Guitar Hero, Super Mario Bros., Pokémon, Mortal Kombat, Sonic the Hedgehog, Banjo-Kazooie, Tales of Symphonia, Final Fantasy, The Legend of Zelda, Team Fortress 2)
- Once Upon a Supernatural Time (Supernatural, Once Upon a Time).
- Once We Are Descendants (Once Upon a Time, Descendants)
- One and Only Son (Code Geass, Mobile Suit Gundam 00)
- One Foot – Another Multiverse SI (Marvel Universe, Bleach, Soul Eater, Avatar: The Last Airbender)
- One Helluva Broken Day (SCP Foundation, Helluva Boss, Hazbin Hotel)
- 100 Percent Hero (Mob Psycho 100, My Hero Academia)
- One Punch Deku (My Hero Academia, One-Punch Man)
- One Punch Gamer (One-Punch Man, Sword Art Online)
- One to Find All (My Hero Academia, RWBY)
- Onegai, Megami-Sama! (Ah! My Goddess, Please Teacher!)
- One Thousand Days (Maken-ki!, Negima! Magister Negi Magi)
- One Who Walks the Path of Night (Digimon, Puella Magi Madoka Magica)
- On Missing Limbs (Worm, Metal Gear Solid V: The Phantom Pain)
- The Onyx Stars (Halo, Mass Effect)
- Oogway's Little Owl (Kung Fu Panda, Worm)
- The Open Door (Neon Genesis Evangelion, Warhammer 40,000-centric Massive Multiplayer Crossover)
- Opening Dangerous Gates (Fairy Tail, Bleach)
- Operation Homecoming (My Little Pony: Friendship is Magic, S.T.A.L.K.E.R.)
- Origins (Mass Effect, Star Wars, Borderlands)
- Origin Story (Power Girl, Buffy the Vampire Slayer, set during Marvel's Civil War)
- ...Or is He Both? (Immortal Hulk, The Rising of the Shield Hero)
- Oskar Osäker: True Omnivore (My Little Pony: Friendship is Magic, [PROTOTYPE])
- The Otherworld Anthology (Western Animation Massive Multiplayer Crossover)
- The Otherworld Series (Anime Massive Multiplayer Crossovers)
- Out of the Corner of the Eye (Jackie Chan Adventures, Cthulhu Mythos)
- Outcry (Dark Souls, Worm)
- Outsiders (The Familiar of Zero, Pokémon)
- OverGamer (Sword Art Online, Overlord)
- Overlady (The Familiar of Zero, Overlord)
- The Owl Sanctum (crossover The Owl House and Doctor Strange (2016))
P
- Paper Mario X (Paper Mario, The Legend of Zelda, Sonic the Hedgehog, Kirby, Metroid)
- Paradoxical (Worm, Destiny)
- Paradoxus (Winx Club, World of Warcraft)
- Parallel Processing (Titanfall, Mass Effect)
- Paths Of Our Fathers (Kingdom Hearts II, Final Fantasy VII)
- Patroni In Winterfell (A Song of Ice and Fire, Harry Potter)
- The Pawn of Grisaia (High School D×D, The Fruit of Grisaia)
- Peace Day Never Came (Fallout/Metal Gear)
- PenJackson: A Traveler for Camp Half Blood (Percy Jackson and the Olympians, The Pendragon Adventure)
- Peace of Mind, Piece of Heart (Infinity Train, She-Ra and the Princesses of Power, Steven Universe: Future)
- People Like Us (Joker (2019), Taxi Driver)
- Percy Jackson: Spirits (The Legend of Korra, Percy Jackson and the Olympians)
- Percy Meet Dora (Percy Jackson and the Olympians, Dora the Explorer)
- The Persistence Of Loss (Kingdom Hearts, Golden Sun)
- Persona EG (My Little Pony: Friendship is Magic, Persona)
- Perturabo in Remnant (Warhammer 40,000, RWBY)
- Peter Parker Needs A Hug (Spider-Man and Batman)
- Petunia Evans, Tomb Raider (Harry Potter, Tomb Raider)
- A Phantom's Ghoul School Sweetheart (Danny Phantom, Scooby-Doo and the Ghoul School)
- Phantom Titan (Danny Phantom, Teen Titans (2003))
- Phineas and Ferb in Dimmsdale (Phineas and Ferb, The Fairly OddParents!)
- Phoenix's SSBB Case Files (Ace Attorney, Super Smash Bros.)
- The Phoenician of Blood and Fire (Warhammer 40,000, A Song of Ice and Fire'')
- Pillars of Sand (Avatar: The Last Airbender, Worm)
- Pink Alert 3 (My Little Pony: Friendship is Magic, Command & Conquer: Red Alert 3)
- Pirate Meets Gebler (Xenogears, One Piece)
- The Pirate's Soldier (Mobile Suit Gundam Wing, Tenchi Muyo!)
- A Place in My Dreams (Sword Art Online, Campione!}
- Planet of the Cats (Planet of the Apes, Cat Planet Cuties)
- Playing for Keeps (Kingdom Hearts, The World Ends with You)
- Playing With Legos (Supreme Commander, Worm)
- Plumbers, Farmers, and Mercenaries (Super Mario Bros., Harvest Moon, Team Fortress 2)
- Point Me at the Skyrim (The Elder Scrolls V: Skyrim, Ward)
- Points of Familiarity (The Familiar of Zero, Neon Genesis Evangelion)
- Pokémon Crossing (Animal Crossing, Pokémon)
- Pokémon: Harmony and Chaos (Pokémon, My Little Pony: Equestria Girls)
- Pokémon: Loud Version Kanto (The Loud House, Pokémon)
- Pokémon: Remix Hearts (Pokémon, BlazBlue)
- Pokemon Secret Journeys (Pokémon, Marvel Comics, Sonic the Hedgehog, Digimon Adventure, Power Rangers, Godzilla, and Disney Ducks)
- The Pokémon Squad (Pokémon, KaBlam!, Doug, Barney & Friends, The Penguins of Madagascar, Hetalia: Axis Powers, Sesame Street, Dora the Explorer, and others, though non-Pokémon franchises started to get downplayed as time went on)
- Ponies One Half (My Little Pony: Friendship is Magic, Ranma ˝)
- Pony Space (My Little Pony: Friendship is Magic, Dead Space)
- Portalborn (The Elder Scrolls V: Skyrim, Portal)
- A Possible Encounter for a Phantom (Danny Phantom, Kim Possible)
- Postnuptial Disagreements (Sekirei, Fate/Zero, Fate/stay night)
- Power Rangers: Victorious (Victorious, Power Rangers'')
- The Prayer Warriors (Percy Jackson and the Olympians, Harry Potter, though In Name Only)
- Prehistoric Park: Returned from Extinction (Prehistoric Park, Walking with Dinosaurs)
- Pretty Cure: Magic of the Rainbow (Pretty Cure, Rainbow Magic)
- Pretty Guardian Sailor Pokémon (K-On!, Pokémon, Cherry Tree High Comedy Club, Wonder Momo)
- Princesses of Power and Robots in Disguise (She-Ra and the Princesses of Power and Transformers)
- Primal (Final Fantasy XIV, Worm)
- Prince of Darkness No More (Castlevania, Touhou Project, Doom, A Super Mario Thing)
- The Prince Who Was Promised (Harry Potter, Game of Thrones)
- Princess Maniacs (Animaniacs, Disney Princess)
- Princess Tales (Disney Princess)
- The Princesses of Remnant (She-Ra and the Princesses of Power, RWBY)
- The Prodigy Fandom (Super Smash Bros., Massive Multiplayer Crossover)
- Prospit Nights (Homestuck, L.A. Noire, Halo, Mass Effect, BioShock, BioShock Infinite, Red Dead Redemption, Doom Patrol, Get Smart, Dead Poets Society, Final Fantasy XIII-2)
- Prinz Von Sommerhoffnung (Captain Ersatz/Not Using the "Z" Word/Writing Around Trademarks My-HiME-centric severe AU Massive Multiplayer Crossover)
- Project Arashi (Love Hina, Negima! Magister Negi Magi, Halo)
- Project Bluefield (Massive Multiplayer Crossover)
- Project Ignition (Armored Core, Muv-Luv Alternative)
- Project YVP (Pokémon, Yu-Gi-Oh!)
- Protectors of the Plot Continuum (Massive Multiplayer Crossover)
- Protoculture Effect (Mass Effect, Robotech)
- Prytaneum (Percy Jackson and the Olympians, Is It Wrong to Try to Pick Up Girls in a Dungeon?)
- Psi Effect (Mass Effect, X-COM)
- PSI Ponify (EarthBound (1994), My Little Pony: Friendship is Magic)
- Puella Arcana Somniator Madoka (Persona, Puella Magi Madoka Magica)
- The Pure Spark (Sailor Moon, The Transformers)
