The Green Eater is an object that appears in the Sonic the Comic series published by Fleetway Editions. It was a machine that was built by Badniks in the Scrap Brain Zone, designed to "bleed the planet dry".
When activated, the Green Eater started melting the Emerald Hill Zone, including a new rebel hideout. The project was overseen by the Terra-Droid. Sonic managed to destroy the Green Eater by using his super-speed to create a mini-tornado that tore it apart, then defeated the Terra-Droid by removing its battery.