Wargs are Asgardians wolves used as steeds. As part of his grand plan to trick Power Pack into going to Asgard and get the Golden Apples of Idunn for him, Loki send a pack of these wolves to attack the Pet Avengers in Central Park. Power Pack noticed the battle while on the roof of the hospital in which their Grandmother was hospitalized, and came to the Pet Avengers' aid. With the help of a book about Norse Mythology given to her by a nurse (actually Loki in disguise), Julie figured out what the Wargs were and how to subdue them. Once subdued, Power Pack rode the Wargs through a portal created by Throg in order to reach Asgard.