Pokémon #558 in the National PokéDex, a dual type Bug/Rock Pokémon. Crustle is an orange Pokémon resembling an insect or crustacean. Its most distinguishing feature is its enormous shell, which resembles a cut-away block of sediment with multiple layers and strata visible. The tips of its pincers and six feet are dark gray. It has two glaring yellow eyes.