Sonic the Hedgehog (2006 game)/Hidden content
From Sonic Retro
Unused Character Intro Animations
By swapping character files of some Amigo mode characters with those of regular characters they will be shown to have a character select screen animation.
Unused icons
These HUD icons are not all used in the game.
Unused Warp Gate images
These images are displayed on the warp gates that appear on the Soleanna map. Among them are images which aren't used anywhere.