The first super-pet crossover story was published in Action Comics #277, "Battle of the Super-Pets", in which Krypto and Streaky competed with each other. The story ended with the surprise appearance of Beppo, who had appeared a couple of years earlier in Superboy. Significant appearances during the Legion's Adventure Comics run include issue #322 in which Proty II is initiated onto the team; issue #343 in which the Super-Pets help the Legion battle the Luck Lords; and issue #364, "The Revolt of the Super-Pets!" The team only rarely appeared after the Silver Age and have not made any appearances post-Crisis, though Krypto has become a supporting character in the Superman titles.
Fictional background
The alien creatures known as the Brain-Globes of Rambat decide that in order to succeed in their plan to move Earth to their own solar system, they must 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, Streaky the Supercat and Beppo the Super-Monkey, and Comet the Super-Horse 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 II would later join the team. An assembly of new Super-Pets was seen in Super Sons Annual #1. This version in the post New 52 and DC Rebirth universe consists of Krypto, Titus, Streaky, Flexi the Plastic Bird, Bat-Cow, and Clay Critter. The group brokeapart after a battle with Dex-Starr and Harley Quinn's hyenas Bud and Lou resulted in Clay Critter's demise. However, Krypto and Titus reformed the group to rescue a number of missing dogs from an alien thief.
Other appearances
Beppo and Comet appear in issue #6 of the Krypto the Superdog comic series.
In other media
The Legion was parodied in an episode of Robot Chicken. Comet, Streaky, Krypto, and Beppo appear, along with "Hissy the Super-Snake". Superman returns to the Fortress of Solitude from a month in space to find the pets have all frozen to death because their babysitter mistakenly thought she was watching them the month after. The Legion of Super-Pets appear in the DC Nation Superman 75th Anniversary short that was shown at New York Comic Con 2013 and was included in the Man of Steel DVD and Blu-Ray.
Film
In July 2018, Jared Stern has been hired by the studio to write and direct a CGI-animated film based on the team. By January 2019, DC Films announced Super Pets with a scheduled release of May 21, 2021. Sam Levine was later hired as co-director. On May 22, 2019, the release date was delayed to May 20, 2022.
