Caterpull is a caterpillar enemy that usually appear in groups in the Forest of Notus, Burble Hekelot's stage in Mega Man Zero 2. While going through the stage, Caterpull fall out of the trees and crawl slowly toward Zero. They also appear when Zero fight against Burble Hekelot, when he jumps on the wall and shakes it to make them fall out. There are some golden colored ones, too. These can be a distraction in the fight, but Burble can also eat them to grow bigger and be able to roll on Zero.
Caterpull is very similar to the Pokémon Caterpie.The green version and the golden version were the same colors of the Normal and Shiny Caterpie respectively.