Mayor Stinkypants cheats at games and likes to be as dirty and muddy as possible. If he spots any citizen carrying cleaning supplies, he confiscates their belongings and locks them up in the dungeon of his castle. He hated being clean until Robin Hood the Clean showed him how neat it is to be clean. He was leader of a festival known as the Festival of Dirt, but later renamed it "the Festival of Soap". With a newly found appreciation for bathtime and staying clean, Mayor Stinkypants helped villagers Uniqua, Tasha, and Tyrone clean up Filthingham.
Mayor Stinkypants is mostly of a purple color. He wears a green and white shirt, and a blue hat.
Austin has only played as Mayor Stinkypants in one episode of The Backyardigans: "Robin Hood the Clean," from season three.