From Bulbapedia, the community-driven Pokémon encyclopedia.
Shieldon is a small, yellow, ceratopsian-like
reptilian Pokémon. It has white toes and a white bump on its back. Shieldon has a dark-gray elliptical face, with a prominent white brow and a white rim on its black snout. Its facial hide is extremely hard; however, it is vulnerable when attacked from behind.
100 million years ago, Shieldon lived in dense forests. It has a habit of polishing its face against tree trunks. It is speculated that few enemies would have considered challenging its armored face. It eats grass, tree roots, and [[Berry|Berries]]. Its fossils show no sign of damage to its face.