Metal Sonic (Classic)

Classic Metal Sonic is a earlier version of his modern self from an alternate dimension created by Eggman and is an antagonist of Sonic Generation, and the Sonic Mania series.

Sonic Generations
In Sonic Generations, Classic Metal Sonic is a rival boss. While waiting for Sonic in the Sonic CD timeline, he enters the limbo created when Eggman used the Time Eater to break the timeline, and challenges Classic Sonic to a racelike battle over the purple Chaos Emerald. In the Handheld version, Metal Sonic engages in a race across the Casino Night. In the Console version, They enter the bad future of Stardust Speedway from Sonic CD and battle while running across a crumbling path, and the fight ends with Classic Sonic kicking Metal Sonic into the air, and he explodes. He can still be found in the White Space and will offer a challenge if you approach him. (much like every stage and boss in the game).

Personality
Like his modern counterpart, Classic Metal Sonic has an fierce arch-rivalry with Sonic the Hedgehog and thinks of himself as the superior between them. He is always ready to race against his organic doppelgänger while also attempting to eliminate him, and is willing to continuously pursue Sonic until he achieves victory. Metal Sonic is shown to be quite intelligent, willing to bargain with people's lives to get what he wants, and loyally follows Dr. Eggman's orders when he is capable.

Trivia
In Sonic Generations, Metal Sonic is the only rival that doesn't appear in the Center of Time before Modern and Classic Sonic confront the Time Eater, or appearing at the party within completion of the game.