Ace Duck was Baxter Stockman's 74th attempt to make a mutantarmy for the Shredder. According to Stockman, he flies, swims and knows Taekwondo (a triple threat), but Shredder considers him completely ridiculous and an absolute failure. He only appeared as a picture in the episode The Lonely Mutation of Baxter Stockman.
Ace Duck has a human body and a giant duck head, wears a black leather jacket and a black cap. As Baxter said, he can fly and his arms seem to be human.
- Ace Duck's hypermasculine appearance, with the black leather cap, vest and pants, toned muscles and reclined pose, strongly resembles the artwork of Tom of Finland, a famous 20th century Finnish artist.