Ultra-sun: The cells within its body are changing at a bewildering pace. Its hard shell is made from the same substance as bone.Moon: They lurk deep within caves—motionless, neither eating nor drinking. Why they don’t die is not known.Alpha-sapphire: Covering Shelgon’s body are outgrowths much like bones. The shell is very hard and bounces off enemy attacks. When awaiting evolution, this Pokémon hides away in a cavern.