Punch in the code at the Sonic/Tails selection screen. You'll get a free emerald.
Code Effect Up, Down, Up, Down, 1, 2, 1, 2, 1, 2 Free Emerald
Go the the title screen and punch in the code.
Code Effect Up, Up, Down, Down, Right, Left, Right, Left, Start Level Select
At the Sound Test screen, press down, down/right, right, 1 or 2 . Sonic will throw a fireball
Contributed By: Numbuh 128bit.
Get the 5 Chaos Emeralds to see a special background during the credits,featuring Sonic and the Emeralds you found! (Only Sonic can get the Chaos Emeralds).
Unlockable How to Unlock Secret credits Get the 5 Chaos emeralds in 1 play. (Can only be done as Sonic).
Contributed By: GOLD_sonic.
Go the the title screen and press Down, Down, Up, Up, Left, Right, Left, Right, 1, 2, Start. You should now have a sound test. Note that this code is often confused with the Level Select Code.
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