Coach Crime's Big Play (10/20/1979)  
To infiltrate Coach Crime's gang of thieves and figure out who his real identity is, Mighty Man and Yukk pose as safecrackers.

Plot

Brandon Brewster is a millionaire with the secret identity of Mighty Man, the world's smallest superhero. Joining him on his quest is his companion Yukk!, the world's ugliest dog who always wears a doghouse to hide his ugly face. Mighty Man and Yukk would always get called in by the mayor to combat any threat that occurs in the city.