How Shadow turns against Gerald
Rouge is one big character who doesn’t appear in the film’s main story, but there’s another key player who doesn’t show up when they do in the games: Amy Rose. The pink hammer-wielding hedgehog shows up in the post-credits scene, but in Sonic Adventure 2, she tagged along with Sonic’s crew, and was eventually the person who reminded Shadow of his true memories of Maria, rather than the distorted ones Gerald gave him to carry on his revenge plot. Since Amy’s not around and Shadow isn’t brainwashed, his turn from villain to hero comes from a different source: Sonic. After the two enter their super forms and beat each other senseless, Sonic comes to his senses and has a heart-to-heart with his rival about the futile nature of revenge, eventually reminding Shadow that even if Maria is gone, his love for her still lives on, leading to the sick as hell team-up as the hedgehogs save the day.
