Dark Man

Dark Man is a robot created by Dr. Wily to frame Proto Man in Mega Man 5. He appeared in the Proto Man Fortress in three forms before finally showing up looking like Proto Man himself. Luckily, the real Proto Man appeared and blasted away the disguise and reveal Dark Man in his final form. His final form is red and appears to be a combination of the previous three forms.

He appeared on two episodes of the cartoon series in one of his forms.