Sonic the Hedgehog 2 Sega Genesis Cheats

Debug Mode
After the level selection, also the number of codes in the "Sound Test".
 * 01
 * 09
 * 09
 * 02
 * 01
 * 01
 * 02
 * 04

Level Select
At the title screen, scroll "Options" and then scroll "Sound Test" and press C and START button to reset the game, also the title screen, press A and START.
 * 19
 * 65
 * 09
 * 17

Super Sonic
After the level selection, also the number of codes in the "Sound Test" and collect 50 rings then press A to jump into "Super Sonic".
 * 04
 * 01
 * 02
 * 06