Ace Duck is an alien from the planet Perdufus and and a wrestler for Slump's Intergalactic Wrestling circuit, of which he is reigning champion. Though he never actually fought or interacted much with the turtles themselves, he was always seen fighting in a match before the turtles would face their own match. The first time we see Ace Duck fighting it out with Leatherhead, and the second time he battled a werewolf-type monster named Bloodbath. In both fights, Ace started out mocking his opponent, but his constant babbling about how perfect and amazing he is always becomes his own undoing.