supersonic13

You have to get the 7 chaos emeralds with any character and beat the game.

P.S. You can get the tiny chao garden without sonic advance 1 and 2 all you need is a Gamecube Gameboy Advance cable hook it up then on your Sonic adventure 2 battle,bring a chao to the chao tranporter and select drop off click on the Gameboy advance on the screen it will give you a warning then click yes.

Oh one more thing when you turn off the gameboy advance the chao copy will be destroyed unless you transport the chao back to Sonic adventure 2 battle or sonic adventure DX .