Chainsaw Werewolves are one of Viceroy's creations designed to destroy the Ninja. He uses them every so often.

In "Dawn of the Driscol" when the Ninja turned up in Viceroy's room, he set a werewolf on him, the creature managed to destroy part of Viceroy's room till Randy informed him that Driscol was alive again.

In "Nukid on the Block" after McFist destroyed the screen, he sent in several werewolves to retrieve Nukid. They broke into the school, Randy managed to destroy all three of them, but the event exposed Nukids true identity.