For all those who like to play honest instead of cheating all those Chaos Emeralds together, there's an alternate - yet simple - way to become Super Sonic in Emerald Hill Zone 1. It involves some serious work, however:1. Complete the special stages as you would usually do and collect as many emeralds as you want.
2. Press RESET.
3. Start a new game USING THE OPTIONS MENU! This is crucial! Otherwise your emeralds are gone for good!
4. Continue collecting the emeralds, if you don't have them all, yet and repeat point two and three until you got them all.If you did everything correctly, after your last reset you should have all the emeralds from the very beginning and without using any code ever thus making Super Sonic available from the very beginning.This has been tested and confirmed with the PAL version of Sonic 2 playing on a PAL Megadrive II.