A giant stegosaurus (albeit a carnivorous one), Big Steggy is the pet of Cave Man. They reside in the time capsule known as Kronosaur, where they feast on any human they can lure in. Max, teleporting into Kronosaur, was immediately attacked by Cave Man and Big Steggy. However, Max tripped Cave Man, who was fed to Big Steggy. Max left Big Steggy to feast on its master.