Sonic Advance 2 Cheats

Game Boy Advance - Sonic Advance 2 Cheats

To get each of the new characters:

To get Cream: Beat the Leaf Forest as Sonic.
To get Tails: Beat the Music Plant as Sonic.
To get Knuckles: Beat the Sky Canyon as Sonic.
To get Amy: Beat the game and get all seven Chaos Emeralds with Cream, Knuckles, Sonic, and Tails.

If you beat the game and collect every Chaos Emerald with every single character, it will unlock a new level for Sonic.