Almost incapable of moving, this POKéMON can only harden its shell to protect itself from predators.
Able to move only slightly. When endangered, it may stick out its stinger and poison its enemy.
Although it is a cocoon, it can move a little. It can extend its poison barb if it is attacked.
From this form, it will grow into an adult. As its body becomes soft er, the external shell hardens.
Nearly incapable of movement, it leans against stout trees while waiting for its evolution.
— Pokédex entries (via PokeAPI)