Somari/Hidden content
From Sonic Retro
Unused artwork
Various unused sprites found through debug or other methods.
Special Stage art
Unused Music
The Chaos Emerald jingle from Sonic the Hedgehog. There are no Chaos Emeralds in this game but the sound effect was used in Kart Fighter, another pirate game.
The continue jingle from Sonic the Hedgehog. Unused because there are no continues in this game.
Scrap Brain Zone
Using Game Genie code IEVAZZAA will take the player to the remnants of Scrap Brain Zone after losing a life. The title card reads "Final Zone Act 1" and uses tiles from Star Light Zone and Final Zone, using the former's music.