Shieldon

Shieldon (meaning "shield tooth") and (Japanese: タテトプス Tatetopusu) is a Rock/Steel-type Pokémon and Fossil Pokémon, revived from the Armor Fossil.

https://vignette.wikia.nocookie.net/pokemon/images/e/e2/410Shieldon.png/revision/latest?cb=20140329034152

Physiology
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 Berries. Its fossils show no sign of damage to its face.

Evolution
Shieldon evolves into Bastiodon at level 30.

Anime
In the Pokémon Diamond and Pearl anime, Ash Ketchum and his friends, along his old rival, Gary Oak must protect a group of Shieldon from Hunter J and her goons.
 * Newton's Shieldon

Trivia

 * It's name was used for a Sentai villain name Shieldon from Kaizoku Sentai Gokaiger.

Origin
Shieldon is based on Zuniceratops hatchling.