The Egg-O-Matic Tunnelizer and Town Terrorizer is able to drill through the ground quickly and effortlessly. Much like the standard Egg-O-Matic it possesses the ability to hover and be steered from the inside. It has a protective closed glass dome over the cockpit and a built in telephone with headset.
Robotnik invented the Egg-O-Matic Tunnelizer and Town Terrorizer for the soul purpose of draining the Mobius reservoir to steal the water and flood the town nearby. In order to succeed in his plan, Robotnik created his special agent Breezie to seduce and distract Sonic so he would not get in his way. To Robotnik's annoyance, Scratch and Grounder have no idea what the vehicle is supposed to be when he shows it to them.
Sending Scratch and Grounder to assist Breezie, Robotnik tunnels underground, heading for the reservoir. While he is traveling, Breezie has betrayed him and told Sonic his plan. Before Robotnik reaches the reservoir, Sonic confronts him with Mobius' longest bungie cord which he hooks onto the Egg-O-Matic Tunnelizer and Town Terrorizer. Robotnik and his Egg-O-Matic Tunnelizer and Town Terrorizer are slingshot to a crashing end.
Much later, Scratch and Grounder used the Egg-O-Matic Tunnelizer and Town Terrorizer to capture Sonic's friend, Big Mike. Big Mike gets trapped under a car, and Scratch and Grounder tie the car to the back of the Egg-O-Matic Tunnelizer and Town Terrorizer and zoom through a tunnel. Big Mike gets dragged behind under the car.
- The "Tunnelizer and Town Terrorizer" is very reminisent of Doctor Robotnik's Jet Drill Pod that appeared in Sonic the Hedgehog 3.