When given the takes to retrieve Baxter Stockman after he escaped the Foot's custody, Dogpound believing the scientist can turn him human again. But during an ensuing fight with the turtles, Dogpound is knocked into a mutagen vat and is painfully mutated further into a skeletal zombie-like werewolf mutant. Renamed Rahzar by Michelangelo, he takes some pride in his new form despite Shredder's initial comment that he looked terrible. When Tiger Claw is named the new second-in-command, Rahzar forms a sincere friendship with him while revealed to be third-in-command of the Foot whenever Shredder or Tiger Claw are absent. In the third-season finale, "Annihilation: Earth!", Rahzar joined in the alliance between the turtles and Foot Clan in an effort to save the world. Rahzar battled several Triceratons before watching in shock as Shredder killed Splinter in an act that doomed Earth to destroyed by the black hole generator. But in the fourth-season episode, "Earth's Last Stand", the Turtles create a new timeline when they save the Earth from the Triceratons, negating Rahzar's death in the process.