An orange tabby cat, Petey is the main and most recurring antagonist. He has a penchant for evil, and is a brilliant inventor who usually creates giant machines (robots, the like) to commit crimes, and to take down his arch-nemesis Dog Man. He's incredibly pessimistic, and insistent that everything in the world is horrible. He gets arrested constantly but always manages to escape jail, much to the dismay of the city. He later becomes an ally, undergoing a change of heart thanks to his son/clone Lil Petey.