Legion of Super-Pets

The Legion of Super-Pets were a team of super-powered pets in the Pre-Crisis DC Universe. Members included Krypto the Super-Dog and Streaky the Supercat. The team first appeared in Adventure Comics #293 (February 1962), though most of the members had appeared in earlier issues.

Origin
The alien creatures known as the Brain-Globes of Rambat decided that, in order to succeed in their plan to move Earth to their own solar system, they would have to defeat Superboy. When they are unable to gain control of Superboy, they summon Cosmic Boy, Lightning Lad, and Saturn Girl of the Legion of Super-Heroes from the future and mentally command the trio to capture him.

After Superboy is defeated, the Brain-Globes of Rambat release their hold on the Legionnaires. When they notice that the Brain-Globes cannot control animals, the Legionnaires gather Krypto the Super-Dog (from Superboy's present), Streaky the Supercat and Beppo the Super-Monkey (from Superman's present), and Comet the Super-Horse (from a few weeks in Superman's future) to battle the aliens. The pets defeat the aliens and are named the Legion of Super-Pets, the animal branch of the super club. They are then returned to their proper time periods. Proty would later join the team.

Whizzy has also been listed as a member.

Other appearances
The team has not made any appearances Post-Crisis, though Krypto has become a supporting character in the Superman titles.

Krypto also has his own animated series on Cartoon Network, and Streaky is one of the other characters on the show.