Kakuna

Kakuna are the second stage of evolution for Weedle, and practically incapable of moving, this Pokemon can only harden its shell to protect itself from predators. While their powers are limited in this stage, Kakuna provided a clever camouflaged hiding place for Ash's Metapod after it was captured by a swarm of Beedrill.

First appearance: Episode 4—"Challenge of the Samurai"