Bucky is a male Masiakasaurus who lives in the Masiakasaurus Meadow Station on the country of Madagascar during the Cretaceous Period. He appeared in "Buck-Tooth Bucky" where Don, Tiny, Buddy and Mr. Pteranodon visit him to find out the mysterious tooth is his. The first tooth he lost was when Mr. Pteranodon found it when he was young and the second tooth is when he was inviting the guests to lunch. He doesn't mind when offers Don his second tooth as a souvenir. When eating he uses his front teeth to stab and the back teeth for slicing then swallows. He also serves as the Pteranodons' river guide at Beelzebufo River.