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.
No as Sonic Advance 2 came out after Sonic Adventure 2 Battle and Sonic Adventure 2 Battle was only made to be compatible with Sonic Advance.
In Sonic Adventure 2 Battle(she is very hard 2 unlock get all rank A's with sonic!)Sonic Adventure DX,Sonic Advance 1 2 and 3(in 1 of them you have 2 unlock her).Sonic Riders.
Gold chao can only be found in sonic advance for the gameboy advance. Then you put it on sonic adventure battle
Sonic Adventure Sonic Adventure 2: Battle Sonic Advance Sonic Advance 2 Sonic Advance 3 Shadow the Hedgehog
...Sonic Advance 2 Battle doesn't exist. But either of the following games it could be are not on XBox, anyway. -Sonic Advance 2 is a GBA exclusive. -Sonic Adventure 2: Battle is a Gamecube exclusive, although it was a port of the original Sonic Adventure 2 on the Dreamcast.
unlock him by shagging the boss
That's only in Sonic Battle for GBA!
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.)
Collect emblems
after beating the game 1000times
You can only send rings Sonic Advance to Sonic Adventure 2 Battle. You cannot do this the other way around.
Sonic X's first season sports an original storyline, and the second is mostly based on the Sonic Adventure games and Sonic Battle. Sonic X doesn't follow the story of Sonic Advance games, though it does feature Cream and Cheese from the Sonic Advance series.