Pachy skull

Pachy skull is one of the 2 pieces of the Pachycephalosaurus fossil. Dig up fossils at the cracks on the ground, have Blathers assess them, then donate it to the museum or sell spares for 4,000 Bells.

Pachycephalosaurus was a two-legged dinosaur from the Late Cretaceous with a domed skull up to 25 centimetres thick. Its name means 'thick-headed lizard', and experts still debate whether it head-butted.