Metapod, Caterpie’s next stage. It has encased its body in a hard shell. This specimen reached this stage faster than any previously discovered Pokémon of this variety.
– Ash’s Pokedex
Metapod has a bored expression on its face. I guess it’s because it’s in a cocoon, in the process of evolving, and there’s nothing else for it to do.
Metapod only learns one move, Harden. If it evolved from a Caterpie, then it would know moves that Caterpie learns. But for some reason, wild Metapods only have Harden.