Modders replace Sonic's default skin with the Sonic Unleashed model and re-texture stages like Sky Sanctuary or Blue Coast to look like Windmill Isle (Apotos) or Rooftop Run (Spagonis).
Memory overflow during video playback. Fix: Delete or rename the movie folder inside the ISO using UMDGen. This skips all FMVs but keeps gameplay intact. Sonic Unleashed Psp Rom