Actually, you can't......
You just.... can't...
If you want to play Sonic Adventure 2 Battle, you'll have to buy the game Sonic Adventure 2 Battle (Not trying to sound stupid by the way.)
You can`t.
There are no minigames for the GBA that you can unlock in Sonic Adventure 2 Battle. You can unlock the boss battles and racing minigames, but they are played on the GC like the rest of the game.
Collect emblems
after beating the game 1000times
You can't. It's not on Sonic Mega Collection or Sonic Mega Collection Plus. Sonic CD is only available on Sonic Gems Collection for Nintendo Gamecube.
To unlock the jewel race you have to complete all of the beginner races.
how can i unlock or do the moon gravity on spiderman2 for gamecube
She is not in kart racing.
unlock him by shagging the boss
Sonic adventure for the dreamcast was the first sonic game(sonic 3d blast does not count as a 3d sonic game),sonic adventure was very successful and alot of people loved it and bought it,there was also a port to the gamecube called sonic adventure DX directors cut which was also very successful and alot of people loved it and bought it,the only difference between the dreamcast version and the gamecube version is thats the graphics are better on the gamecube version,on the gamecube version you could unlock metal sonic and on the gamecube version there were extra levels
Sonic adventure for the dreamcast was the first sonic game(sonic 3d blast does not count as a 3d sonic game),sonic adventure was very successful and alot of people loved it and bought it,there was also a port to the gamecube called sonic adventure DX directors cut which was also very successful and alot of people loved it and bought it,the only difference between the dreamcast version and the gamecube version is thats the graphics are better on the gamecube version,on the gamecube version you could unlock metal sonic and on the gamecube version there were extra levels
Amy is already unlocked, just choose to play as her