M.U.G.E.N

MUGEN is a 2D fighting game engine developed by Elecbyte. Content is created by the community, and thousands of fighters, both original and from popular fiction, have been created.

Often authors will port popular characters from 2D fighting engines such as the Street Fighter series, or from TV, book, and game series such as Teenage Mutant Ninja Turtles, The Simpsons, Pingu, Super Mario, Sonic The Hedgehog, Pokémon, Sailor Moon, and Touhou. Many authors will also create original content.