Level Select
From the Options screen, press A, Down, B, Down, C, Down, A, B, Up, A, C, Up, B, C, Up. To activate, hold A and press Start for level 2, hold B and press Start for level 3, or hold C and press Start for level 4.
Note: These codes represent the original SEGA Genesis controller button layout. Your Wii Virtual Console input device will reflect different button names.
Sound Effect Codes
Choose the Sound FX option and play the following sound sequences for the desired effect.
00, 05, 01, 03, 07, 00 - 25% speed
00, 04, 02, 09, 06, 04 - 50% speed
00, 04, 02, 05, 05, 07 - Sped up Music
00, 09, 00, 01, 06, 08 - Free movement (Pause the game and press 1+2)
00, 02, 01, 01, 06, 06 - Huge Sprites
00, 01, 01, 07, 07, 03 - Reset Mode (Pause the game and press 1+2)
00, 05, 02, 08, 07, 00 - Reset to title screen
00, 02, 02, 00, 06, 09 - Invert colors
00, 09, 01, 02, 05, 04 - Invert colors, sped up music
01, 01, 01, 01, 04, 09 - Scene: 1st Bonus Stage
01, 01, 01, 01, 04, 03 - Scene: And there comes Sonic and Tails...
01, 01, 01, 01, 04, 08 - Scene: Bonus Screen
01, 01, 01, 01, 04, 04 - Scene: Sonic, go ahead!!
01, 01, 01, 01, 04, 01 - Scene: Title Screen
01, 01, 01, 01, 04, 07 - Scene: Toxic Tools Boss
01, 01, 01, 01, 04, 05 - Scene: Toxic Tools Screen
01, 01, 01, 01, 04, 06 - Scene: Toxic Tools Stage
01, 01, 01, 01, 04, 02 - Scene: Veg-O-Fortress rising
00, 05, 00, 03, 06, 00 - Show year and version
00, 02, 01, 05, 06, 06 - Stage Skip (Press DOWN to skip stages on pause screen)
00, 03, 01, 01, 05, 05 - Start with 9 lives
00, 03, 01, 09, 06, 08 - Strong gravity
00, 08, 00, 07, 07, 01 - Strong inverted gravity
01, 01, 01, 02, 05, 00 - Weak gravity
00, 08, 02, 07, 06, 06 - Weakest gravity