=>GBA Bonus: If you visit the Battle Maps shop with Advance Wars in the GBA
slot, Heschi will offer two bonus maps and a wallpaper, each priced at only
one point. If you have Advance Wars 2: Black Hole Rising in the GBA slot,
two different bonus maps and a wallpaper will be available to purchase.
->Advance Wars Map: On the main menu, highlight Map Design, hold [L]+[R] and
press A. You'll load up a special map composed of the words "Advance Wars."