Shadow the Hedgehog is an anti-hero character in the Sonic the Hedgehog series, who debuted in Sonic Adventure 2, later remade in to Sonic Adventure 2: Battle. He was created by Dr. Eggman's grandfather, Gerald Robotnik, with the DNA of Black Doom, and was made to be the Ultimate Lifeform. However, after the Space Colony Ark was destroyed, which took the life of Shadow's good friend, Maria.