Pachycephalosaur

From Wild World Wiki

The Pachycephalosaur is one of the dinosaurs that appears at the museum after all its fossil parts have been found. The three pieces of the Pachycephalosaur are the Pachy Skull, Pachy Torso and Pachy Tail.

This is what Blathers has to say about the Pachycephalosaur:

“Wooo HOO! Simply spendid! I’m awash in delight! I must tell you a smidgen about the pachycephalosaur! This unique creature was one of the last dinosaurs to roam the earth, wot? Though it is known primarily for its rounded head… It was basically all bone! There was hardly a brain to speak of inside! These brain-boggling dinos never cease to amaze me! Hoo, so intriguing! Ah. My my! Terribly sorry. I babble… You must wonder if I’ve a brain in MY head!