Metal Sonic (メタルソニック Metaru Sonikku?) is the evil robotic counterpart of Sonic the Hedgehog, created by Dr. Ivo "Eggman" Robotnik. As well as resembling Sonic, he can also perform many of Sonic's moves, including his homing attack. Metal Sonic is always on the dark side throughout the series, with Sonic Rivals 2 being the only game where he takes a protagonistic role as a playable character. He's noteworthy for being the second most recurring villain in the series, only below Dr. Eggman himself.
Metal Sonic's first appearance was in Sonic CD for the Sega CD console. In this game, he is under the control of Doctor Robotnik and is sent back in time to change the past so that Robotnik can rule the future. Later, he kidnaps Amy Rose, who had been following Sonic. In the Stardust Speedway Zone, he challenges Sonic to a race rather than a traditional boss battle, with Robotnik on their trail and chasing Sonic with a death laser. Periodically, he uses one of two moves - if Sonic is ahead of him, he will explosively accelerate with the V. Max Overdrive Attack, which will make him go four times as fast temporarily and attempt to blast through Sonic. If Sonic is behind him, he'll instead use the Ring Spark Field (Black Shield), which is an electric attack that has a wider range but requires him to decelerate.
If Sonic does not reach the goal in time, the door will close as the scientist kills Sonic with the death laser, while the robotic duplicate looks on and mockingly mimics Sonic's smug finger wave. If Sonic succeeds, the door will close in front of Metal Sonic- unable to stop in time, this causes him to crash and fall off the platform. Robotnik retreats, allowing Sonic to finally rescue Amy and proceed to the last zone. In the Japanese manual, it was claimed that he had all the abilities of the original Sonic and more, but in-game he does not demonstrate this.
Finally a Final FoeEdit
Metal Sonic appears as a surprise boss Sonic or Tails must face in Sonic Triple Trouble. Unlike Sonic CD, it is not a race; it is an actual battle, though Metal Sonic uses his flight and evasion to attack. After being defeated, he wanders off and isn't seen for the rest of the game.