Pokémon #139 in the National Pokédex, a Rock/Water type, and a fossil Pokémon.
It is the evolution of Omanyte, and has blue skin along with a spiked yellow shell. It also features a circular mouth, as well as yellow sclera and slit pupils.
Its shiny form changes its skin to purple.
Japanese name: Omstar
Prior Pokémon: Omanyte
Next Pokémon: Kabuto