This transformation exists primarily or exclusively within the Post-Super Genesis Wave continuity. Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Neo Metal Sonic disguised as Dr. Eggman when he attempted to give away Casino Park to Breezie the Hedgehog. However, Breezie immediately caught on that this Eggman was an imposter, thus, Neo Metal Sonic revealed his true identity to her. When Metal threatened to harm her should she warn Sonic, Breezie simply brushes it off. Metal's plan was later discovered, but by then it was ready to use the gathered data to transform into Metal Madness and then Metal Overlord. Super Sonic, along with a super-charged Miles "Tails" Prower and Knuckles the Echidna, were able to defeat the robot, returning him to his original powered down form.
Powers and abilities
Neo Metal Sonic has the ability to shape shift, as seen when he nearly fooled Breezie that he was Dr. Eggman.