Shadow the Hedgehog

Shadow The Hedgehog is a character of Sega and has a rivalry with Sonic The Hedgehog and friend of Maria Robotnik.

Sega
Shadow is one of the antagonists of Sega. He first appeared in Sonic Adventure 2. He first meets Sonic in the game. He leads to Dr. Eggman's directions though he'd rather commit revenge on the planet for the death of his friend, Maria Robotnik. He first appears along with Rouge The Bat and E-123 Omega.

Megaracing
He first appeared in Megaracing. He is the main antagonists of the game.

Kart: Black and white G.U.N. vehicle with tank-like treads called the Dark Tread.