Caterkiller

Caterkiller (キャタキラー) is a wall-climbing enemy in Mega Man X3. It shoots out bullets from its spines that stop and eventually come back to it. It looks more like a cactus than a worm, though. Acid Burst causes them to malfunction and paralyze. They appear in the Opening Stage, Toxic Seahorse's stage, Volt Catfish's stage, Neon Tiger's stage, and Doppler Stage 1.

