Baby Tooth is a little arctic wolf pup who first appeared in Baby Tooth and Kid Musky. He starts biting Chris and loses a baby tooth, earning his name. And Chris puts the baby tooth in his Creature Souvenir Kit. His pack goes off hunting when Baby Tooth gets hungry. Later Chris races back to Baby Tooth and activates Arctic Wolf Powers and joins the pack.
Later in Muskox Mania, he grows into a juvenile arctic wolf who helps bring Chris' creature souvenir kit back. He loves hanging around Chris. And he last appears when he joins the pack in heading back to the den.