Stegmutt is a Stegosaurus in Darkwing Duck, who was originally a duck before he was turned into a dinosaur. Stegmutt first appeared as the tetartagonist in the two "Just Us Justice Ducks" episodes AKA Justice Ducks Unite (44 and 45 in production order), but due to the episodes airing out of order, his introduction episode, "Jurassic Jumble" (28th in production order), aired a week later. He also appears in "Darkwing Doubloon," his only other episode.