Metal Sonic was created in the image of Sonic the Hedgehog and is thus mostly built of blue metal. He has a yellow circular depression in his chest with a black center, mirroring the peach skin on Sonic's chest. His head has metal fins resembling Sonic's quills and a pair of triangular "ears." Metal Sonic has a muzzle, shoulder plates, upper arms, legs, and fingers made out of silvery metal. His palms are black, while the backs of his hands are square yellow plates. His forearms and lower legs are blue metal like his head and torso, and he has red feet with white stripes designed to resemble Sonic's shoes. He has optic sensors with black sclera and red irises.

Following the Ifrit incident, Metal Sonic received a slight update in design which made him taller and gave him a more ellipsoid torso. He also gained more detailed hands, a brilliant blue paint job, joints on his arms and legs, and sharper eyeholes.

Metal Sonic's most dominating trait is his hatred and obsession with Sonic. Having been programmed for the sole purpose of destroying Sonic using abilities superior to his, Metal Sonic is obsessed with the conviction that he is better than Sonic in every way, which he assumes is logical since he possesses the best performance, a tireless body, and plenty of other factors that should make him unbeatable. He has even taken this logic further with the belief that his body was designed in Sonic's likeness because it was the best design to defeat him with. His greatest desire is therefore to overthrow the real Sonic and defeat him once and for all. However, since he has never been able to defeat Sonic, he finds himself caught in a logical paradox, unable to figure out a way to defeat Sonic despite possessing all the means to achieve this.

What his best Appearence from these 3 Games