Metapod

Metapod is an insect Pokémon that resembles a green chrysalis. Its body is crescent-shaped, with several segments making up the lower point. The front of Metapod's shell resembles a face with heavy-lidded eyes and a sharply pointed nose. The back of its shell consists of several geometrically shaped portions and projections.

Metapod's soft body is protected by a hard outer shell as it undergoes metamorphosis. While this shell is said to be as hard as steel, a sudden, powerful impact could cause its liquid innards to pop out, leaving it completely exposed. Metapod generally remains motionless, rebuilding its cells for evolution. If an enemy discovers Metapod, it cannot do anything other than harden its outer shell. Metapod lives in temperate forests and jungles, often in groups. Pikipek is a natural predator of Metapod. As shown in Pokémon Sleep, Metapod is known to sleep while using the move Harden constantly to protect its innards. It stays still while sleeping to avoid getting attacked by foes[1].

He is level 9 It won't be long before he evolves into a Butterfree, he just needs to live a little longer.

he know that Caterpie is their non-evolved form as a Caterpillar, Metapod is already in the metamorphosis phase and need help not to die from the other Pokemon, Metapod would be in the chrysalis phase, now Butterfree is their last evolution, more or less a butterfly so he knows that a Caterpie, a Metapod and a Butterfree are the same race as him just in evolved or unevolved forms Metapod evolves from Caterpie and evolves into Butterfree.