Pokémon #597 in the National PokéDex, a dual type Grass/Steel Pokémon.
Ferroseed is a cave-dwelling Pokémon resembling a durian. It has many green thorns around its body that are used for protection. It has a metallic body with band-like stripes, along with small yellow eyes with black pupils. It can stick its spikes into cave walls to absorb the minerals from the rocks. If threatened, it can shoot a barrage of spikes so it can escape by rolling away.
It evolves into Ferrothorn
Japanese Name: Tesseed
Prior Pokémon: Galvantula
Next Pokémon: Ferrothorn