Shadow the Hedgehog

Shadow the Hedgehog is an anti hero and arch rival of Sonic the Hedgehog. He was created as "The Ultimate Life Form" by Professor Gerald Robotnik. Shadow is immortal, however that doesn't mean that he does not feel pain. Shadow is ageless as well. His past was almost a complete mystery until the game Shadow the Hedgehog revealed the events surrounding his creation. In contrast to Sonic, Shadow is typically portrayed as a tortured anti-hero, or a renegade who can just as easily serve the forces of evil as those of good. However, he does what he needs to do to accomplish what he knows to be right.