Bastiodon (Japanese: トリデプス Torideps) is a dual-type Rock/Steel Fossil Pokémon. It evolves from Shieldon starting at level 30, after it is revived from an Armor Fossil.
Bastiodon appears to be a cross between a Zuniceratops and a bulldozer. The small, shield-like growth this Pokémon had before evolution has grown into a large shield bearing some resemblance to a castle wall, with yellow spot patterns on it. The shield is large enough to protect Bastiodon from attacks. On its feet, smaller, shield-like growths sprout upward to protect the Pokémon's legs. There are also small gray spikes on a ridge of black along Bastiodon's back. Bastiodon's tail is also black in coloration.