Egg Bot

From the Sonic News Network, the Sonic Wiki

You may also be looking for the Eggbots from Archie Comics.

The Egg Bot is the final boss of Chapter 6 in Sonic Chronicles: The Dark Brotherhood.

Appearance-wise Egg Bot is a robotic counterpart of Doctor Eggman, just as Metal Sonic is a counterpart to Sonic and stands as an example of just of narcissistic the Doctor really is.