M.U.G.E.N (also known simply as MUGEN) is a freeware 2D fighting game engine designed by Elecbyte. Content is created by the community, and thousands of fighters and stages, both original and from popular fiction, have been created, including Mega Man content. Many Mega Man characters and stages were done in different styles, specially from fighting games like Rockman Power Battle Fighters, Rockman Battle & Fighters, and Marvel vs. Capcom.