The Glaxxons are an extraterrestrial species appearing in the 1987–1996 animated series, in the Cyber-Turtles episode. A small spacecraft from the Glaxxon Federation was returning to their home with the Firestar when it was shot down to Earth by Shredder and Krang, and the Firestar was stolen.
They seem to be an extremely warlike species, as the spacecraft was returning from several months of combat, and Commander Korak declared that the Glaxxons have no friends, only enemies. To this end, they have developed powerful mecha-like Cyber-Suits that allow them to launch devastating attacks, growing in size and strength.
The Glaxxons are notable for resembling anthropomorphized Earth animals, such as birds, lions and snakes.