Dan Phantom

Dan Phantom A.K.A. Dark Danny is the evil full-ghost version of Danny Phantom, created by the fusion of the ghost-halves of the show's protagonist and the show's most powerful antagonist, Vlad Plasmius Unlike most of Danny Phantom's enemies who have, to some degree, a moral conscience, Dan possesses no such trait; he is pure evil and craves destruction and chaos. He is effectively Danny's worst enemy, and is willing to kill to get what he wants, even if it is the people he once cared about