Metal Sonic is a powerful Badnik line based on Sonic the Hedgehog that was created by Dr. Eggman to serve as the ultimate match for Sonic. This Badnik has usually been loyal to Dr. Eggman to an extent and has proven to be an effective adversary against Sonic on numerous occasions. Numerous versions of Metal Sonic have been produced by Eggman, as successive units are destroyed in battle against Sonic and other enemies. Nevertheless, each successive model became more dangerous to confront, eventually gaining self-awareness, and its threat potential only increased after being joined by other similar Badniks as part of the Metal Series.

Has a cannon voice. Metal Sonic does have multiple cannon voices due to being voiced by different actors over the years, but I would like a voice similar to that of his modern form. For reference, check here (skip to 1:00 in video for beginning of acceptable voices):

https://www.youtube.com/watch?v=wU1lmIs2I_0