Magneto

 is a main villain in the comic and TV show X-Men. He is the leader of the Brotherhood of Mutants. He has the ability to maniplulate gravity allowing him to fly and can move metal objects around (hence the name). The helmet he wears protects him from having his mind read. Aside from being a complex villain, he is top tier in Marvel vs Capcom 2, so he's popular with fighting game fans as well.

In M.U.G.E.N, he has been made by Kong, Sunboy, Nobuyuki, Bdc and aa250 and ZVitor & JETthePHOENIX.