Sonic Advance 2 Codes -

 

In-game reset:
Press + + + during game play.

Play as Cream:
Successfully complete the Leaf Forest level as Sonic.

Use Sonic and defeat the first Boss to unlock Cream. Cream is extremely useful when facing Bosses because her Chao will attack it when you press button. This makes it especially easy to defeat Bosses that are hard to hit, such as the fourth, sixth, and eighth.

Play as Tails:
Successfully complete the Music Plant level as Sonic.

Play as Knuckles:
Successfully complete the Sky Canyon level as Sonic.

Play as Amy:
Successfully complete the game with all seven Chaos Emeralds as Cream, Knuckles, Sonic, and Tails.

Tails follows Sonic:
Enter the character selection screen. Highlight Sonic then press . Highlight Tails then press . Highlight Knuckles then press . Highlight Amy then press . Then select Sonic as your character. Tails will now follow Sonic around.

Tiny Chao Garden:
Successfully complete the game with all seven Chaos Emeralds as any character.

Sound test:
Successfully complete the game with all seven Chaos Emeralds as any two characters. Note: For more sounds, successfully complete the Extra Zone with Sonic.

Boss option in time attack mode:
Successfully complete the game with all seven Chaos Emeralds as any three characters.

Bonus level:
Successfully complete the game with all seven Chaos Emeralds as Amy, Cream, Knuckles, Sonic, and Tails to unlock a new level at the end of Sonic's map screen.