|This character exists primarily or exclusively within the Sonic the Comic continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
- This character should not be confused with Metallix (Mecha Sonic), a Metallix model based on Mecha Sonic (Sky Sanctuary Zone).
Mecha Sonic is an early robotic copy of Sonic the Hedgehog, which defended Robotnik's Death Egg. It is about twice as tall as Sonic, coloured a uniform metallic grey, and gets its speed from jet boosters on its back and on the heels of its feet. Sonic considered it a pathetic imitation.
Sonic encountered Mecha Sonic on his first trip to the Death Egg (as recorded in Sonic the Hedgehog 2) and believed that he had trashed the robot. However, although the Death Egg had been heavily damaged and rendered useless to Robotnik, it was still in orbit around Mobius. Some time later its orbit began to degrade, and was set to crash into the Emerald Hill Zone. Sonic and Tails returned to the Death Egg, where they found Mecha Sonic damaged but operational. It told them that intruders may not pass, by order of "the omnipotent Doctor Robotnik".
- In this continuity, the robot was not referred to by name. It is called Mecha Sonic on this page by reference to Mecha Sonic (Death Egg Zone), the robot on which it was based.
- In Nigel Kitching's original script for the story in Sonic the Comic #6, it is mentioned that the Mecha Sonic actually repaired itself after Sonic's previous encounter with it.