A gang of thieves are using a dog and his trainer to help them rob jewelry stores--but Ace the Super-Dog and his humans Batman and Robin are on the case.
Best pals Streaky the Super-Cat and Krypto the Super-Dog are annoyed with each other, but when a bank is robbed, they must put their differences aside and join forces to save the day.
When the trouble-making imp Mr. Mxyzptlk, casts a spell on Krypto, Superman's super-pet, forcing the super dog to perform a series of practical jokes, until he figures out how to break the spell.
When his friends are captured by the evil Dr. Sivana and Dex-Starr the Red Lantern it is up to Shazam's super pet, Hoppy the Marvel Bunny, to use his superpowers to rescue them.