Kabuto

Kabuto appeared in 1996 video game called Pokémon Red & Green. Kabuto is a Shellfish Pokémon. Kabuto uses its hard shell to protect itself from attacks. This Pokémon species was plentiful a long, long time ago, but only a small number exist in the wild today.

While concealed, Kabuto leaves exposed only its hard shell, which protects it from predators, while the small, black eyes on its back allow it to continue monitoring its surroundings. If it is flipped upside-down, it becomes helpless and defenseless as it is unable to flip over on its own. It may be based on the Horseshoe crab.