Shelgon

Shelgon appeared in 2002 video game called Pokémon Ruby & Sapphire. Shelgon is an Endurance Pokémon. From the outside, Shelgon appears completely motionless as it awaits Evolutionbut within its shell, it's undergoing rapid changes on a cellular level. During this period, it hides in a cave and consumes no food nor water.

Shelgon is a quadruped Pokémon that resembles a pupal stage. There are bone structures covering its body, which form a shell with two openings and three ridges on top. One opening is in front, revealing two yellow eyes, while the other opening is in the back. This bony covering repels enemy attacks, but it makes Shelgon heavy. As a result, this Pokémon moves sluggishly and hardly eats. Inside the shell, its body is busy forming for its next evolution. The moment this Pokémon evolves, its shell peels away. Its gray legs are visible protruding from underneath the shell, each with a short red stripe on the inner surface. It can be found in caverns.