Sonic X Shadow Generations physical pre-orders now include a reversible cover. Sonic X Shadow Generations is one of the Sonic fanbase's most anticipated releases, combining a remaster of the original Sonic Generations with a bonus story campaign starring Shadow the Hedgehog. Shadow's presence as a playable character in the updated re-release has been a hot topic of discussion, as he gets his own levels from his past appearances, as well as facing off against one of his most personal foes, Black Doom.