Rahzar is often seen as a partner to Tokka, and first appeared with him in the film Teenage Mutant Ninja Turtles II: Secret of the Ooze. He was introduced as a young wolf pup who exhibited simple, child-like intelligence after being exposed to the mutagen. He also appears in the Turtles in Time games with Tokka (on the pirate ship in the original arcade version, and in The Technodrome on the SNES). He has fire breath in the SNES version and can ride Tokka's shell like a skateboard. In Manhattan Project, he also appears in the Technodrome, and has ice breath.
In the 2012 animated series, the character Rahzar is also Chris Bradford, who was previously the mutant Dogpound, but received a second dose of mutagen turning him into a thin, wolf-like mutant with visible skeletal features.