While usually serving as Eggman's obedient and silent enforcer, Metal Sonic is an intelligent robot with a very dark side. Cold-hearted and ruthless, he is obsessed with proving his superiority to Sonic and eliminating him for good to the point where he has rebelled against Eggman more than once to achieve his goal. 

Voice Example: David Sobolov - Shockwave (Transformers Prime: Beast Hunters - Predacons Rising)

If you can't add a robot filter I will for you so don't worry ;D