Yu-Gi-Oh! Duel Monsters International 2 Cheats (GameBoy Advance)

Successfully complete the game to get a purple title screen. Press Up(2), Down(2), Left,
Right, Left, Right, B, A at the title screen to it change back to its original blue
color.

Successfully complete the game, then press Up(2), Down(2), Left, Right, Left, Right, B, A
while playing a game.