

He is currently voiced by Kōji Yusa in the Japanese version, and by David Humprey, Jason Griffth, and Kirk Thornton in the English version. He also appears as the secondary antagonist-turned-supporting character in the anime series Sonic X and a minor antagonist in the Sonic Boom spin-off cartoon franchise. In his appearances, Shadow is the main antagonist in Sonic Adventure 2 a supporting protagonist in Sonic Heroes and Sonic Rivals the protagonist in his own titular game of the same name, Sonic Rivals and its sequel one of the two deuteragonists (alongside Silver the Hedgehog) in Sonic 2006 and a major character of Sonic and the Black Knight as Lancelot, Sonic Free Riders, Sonic Colors, Sonic Generations, and in Sonic Forces, as well as the protagonist in its DLC pack Episode Shadow. According to an official poll, Shadow is the second most popular character in the series, second only to Sonic himself. However, he does what he needs to do to accomplish what he knows to be right.

In contrast to Sonic, Shadow is typically portrayed as a tortured, or a renegade who can just as easily serve the forces of evil as those of good. His past was almost a complete mystery until the game Shadow the Hedgehog revealed the events surrounding his creation. Shadow is Sonic's arch-rival yet frenemy and Rouge and Omega's best friend. Since his debut, Shadow has appeared in a multitude of games, television shows, and comic books. Shadow is immortal, however that doesn't mean that he does not feel pain. He was created as the " Ultimate Lifeform" by Professor Gerald Robotnik. Shadow the Hedgehog is one of the major characters of the Sonic the Hedgehog video game franchise and Sonic's arch rival.
