When I was a kid, I LOVED fucking around with Game Genie & Action Replay codes in the Genesis Sonic games.
The bad thing is, many of these codes got easily lost or didn't work for me.
So, as a love-letter to this era of my life, I have saved codes for various Sonic games from various sources and put them all here!
MOST codes have been tested via Kega Fusion, but may not work on other emulators.
Some codes have not been tested, but they probably work.
The most interesting codes have been saved in a Cheat file that load automatically on boot if your ROM has the same name.
Put this Cheat file wherever you've set your Cheats folder in Kega's config.
(Cheat files can be easily edited in a text editor)
Have fun! Perhaps more games and codes will be added eventually.