Metal Robotnik/Dark Eggman

Metal Robotnik, also known as "Dark Eggman", was a mech used by Dr. Robotnik in the animated film Sonic the Hedgehog: the Movie. It was part of a plot by Robotnik created by Eggman to actvate Metal Sonic, though the robot was destroyed by Sonic, Tails and Knuckles. He was the main villain and final boss in the video game Sonic Robo Blast 2.