Monsterex (Teenage Mutant Ninja Turtles Adventures) is a two-headed mix of vampire, werewolf, gillman, mummy, and Frankenstein's monster.
Kevin Levin (Ben 10) can become a Amalgam of aliens by absorbing the DNA energy from the Omnitrix dubbing himself as Kevin 11.
Ultimate Kevin (Ben 10: Ultimate Alien) after absorbing energy from the Ultimatrix.
Kevin 11,000 (Ben 10) transformed after he absorbed the power of the other aliens.
Omniverse Kevin (Ben 10: Omniverse ) in his mutation form.
Kevin's Flashback Mutation (Ben 10: Omniverse) in his mutation form.
Ultimate Aggregor (Ben 10: Ultimate Alien) in his mutation form.
Devlin Levin (Ben 10) in his mutation form.
Amalgam Ben (Ben 10 Reboot)
Stink Arms (Ben 10), the fusion of Stinkfly and Fourarms.
Rath Arms (Ben 10 Heroes)
Shock Blast (Ben 10 Heroes)
Diamond Matter (Ben 10), the fusion of Diamondhead and Grey Matter.
Heat Jaws (Ben 10), the fusion of Heatblast and Ripjaws.
Humungoopsaur (Ben 10: Omniverse), the fusion of Humungousaur and Goop.
Fourmungousaur (Ben 10: Omniverse), the fusion of Fourarms and Humungousaur.
Atomic-X (Ben 10: Omniverse)
Crashocker (Ben 10: Omniverse)
Uprigg (Ben 10: Omniverse)
Big Chuck (Ben 10: Omniverse)
GrandGeneramon (Digimon Fusion)
Frankencreep (Scooby Doo! Frankencreepy)
Ebon-streak (Static Shock) is the gestalt form of Ebon and Hotstreak, having been bonded together and empowered by over-exposure to the mutative gas that gave them their powers.
Green Goblin (Spider-Man: Into the Spider-Verse/Marvel Comics)
The Amalgamation (Codename: Kids Next Door- Operation: V.I.D.E.O.G.A.M.E.), the fusion of Captain Stickybeard, Knightbrace, Count Spankulot, Gramma Stuffum, the Common Cold, and the Toilenator.
The Ultimate Elementor (Max Steel), the fusion of the Earth, Water, Fire, and Air Elementors.
Mega Elementor (Max Steel the fusion of the Earth, Water, Fire, Air and Metal Elementors.
The Delightful Reaper (The Grim Adventures of the Kids Next Door), the merger of several children, including Billy and the Delightful Children from Down the Lane.
Zaskermodo (The Secret Saturdays), the fusion of Zak Saturday, Fiskerton, and Komodo.
Venom and Carnage (Spider-Man Unlimited) fused together.
Creepweed (Teenage Mutant Ninja Turtles 2012 TV series) is the combined form of the Creep and Son of Snakeweed.
The Mega Shredder (Teenage Mutant Ninja Turtles 2012 TV series), the fusion of the three Shredder Mutants.
Ultimate Drako (Teenage Mutant Ninja Turtles 2003 TV series), the fusion of the Ultimate Ninja and Drako.
Bebop and Killer Croc (Batman/Teenage Mutant Ninja Turtles)
Rocksteady and Clayface (Batman/Teenage Mutant Ninja Turtles)
Bopsteady (Teenage Mutant Ninja Turtles IDW), the fusion of Bebop and Rocksteady.
Chaos Devil (Sonic & Mega Man: Worlds Collide), the fusion of Chaos and the Yellow Devil.
Venustoise (Pokémon Series)
Carnom (Lego Marvel Super Heroes 2), the fusion of Venom and Carnage.
After being fused with a housefly on the molecular-genetic level during a teleportation test, Seth Brundle (The Fly) gradually transformed into the mutated, asymmetrical Brundlefly.
MegaDragonBowser (Mario + Rabbids Kingdom Battle), the fusion of Bowser and the Megabug.
Shiny RoboBowser (Mario & Luigi: Paper Jam), the merger of Bowser, Paper Bowser, and several of Paper Bowser's minions.
Best Fitness Friends (Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey) in their merged monster form
The Bat-Thing (Amalgam Comics)
Elemental Hero Flame Wingman (YU-GI-OH! GX)
Elemental Hero Steam Healer (YU-GI-OH! GX)
Elemental Hero Giant Thunder (YU-GI-OH! GX)
Elemental Hero Rampage Blaster (YU-GI-OH! GX)
Elemental HERO Mudballman (YU-GI-OH GX)
Mumm-ator (He-Man/Thundercats) is the result of Mumm-Ra and Skeletor using the Ancient Spirits of Evil's power to merge into a single entity.
Composite Superman (DC Comics) possessed all legion of super-heroes' powers.
Combo Man (Marvel Comics) possessed marvel comics' superheroes and villains' powers and abilities.
The Atrocity (Spider-Man: Edge of Time), a gestalt entity formed from Walker Sloan, Anti-Venom, and Dr. Octopus.
Mega-Mix (Crash Bandicoot: The Huge Adventure), the fusion of Dr. Cortex, N. Gin, Dingodile, and Tiny Tiger.
Titans (Crash of the Titans/Crash: Mind over Mutant)