Bulldust is the alpha and protector of the Pachyrhinosaurus herd. He's the husband of Patchi's mother. He's also the father of Patchi, Scowler, and a number of unnamed hatchlings. He was first seen resucing his son Patchi from a Troodon by blocking it's way. He was seen challenging his rival Major in a duel for leadership.He was leading the herd on a migration and into the forest. Then he tried saving his family from Gorgon and his pack of Gorgosaurus. He battled Gorgon in single combat. He is eventually killed by Gorgon, thus finally meeting his match.