Caterkiller

The Caterkiller (ナール Nāru, lit. "Nal") is an enemy that appears in the Sonic the Hedgehog series. It is a mass-produced, caterpillar-based Badnik model created by Dr. Eggman that possesses a hard defense system and the ability to scatter its segments if destroyed incorrectly. This model has been modified multiple times, leading to the creation of multiple sub-models, examples being the Sandworm and Catakiller, Jr..

Caterkillers are based on real-life caterpillars, both in shape and in the way they move across the ground, stretching their body parts up and down to crawl. Their body in particular consist of four spherical segments with curved yellow yellow spikes on the sides. They also have two antennae located at the tip of their heads. They are mainly purple in color, with white fangs in their mouths and gray underbellies, and the tops of their antennae are yellow. They also have cyan eyes.