The legendary Super Ghost

Quick Summary: Somehow, Dark Danny escaped the thermos and returned to amity park more evil and powerful than ever. Danny Phantom tries valiantly to stop his evil self, but he is defeated with no effort by Dan Phantom. As Dark Danny shots his final attack, Sam jumps to receive the shot, thus saving danny but putting her own life at the edge of death. A furious Danny unleashes the legendary warrior that lived within him, and the final showdown is about to begin.

[link] This is what the legendary Super Ghost looks like.

(Any likeness with Dragon Ball Z is just mere coincidence)