View Pictures
Press Select while in the sound room. You will be able to see several pictures from the game. Press Left and Right to cycle through all of the pictures (26 in all) or press B to exit.
In-Game Reset
Hold Start + Select + B during game play.
Deleted Saved Games
Hold L + Right + Select when turning on the Game Boy Advance.
Nintendo Mountain Map
Use the following trick to get to a map with the text “Nintendo” made with mountains. When you are at the selection with: Design Maps-> Map or CO, highlight “Map” and hold A + L + R for a second. The screen will turn blank. After a few seconds. it will be done.
Japanese Character Mountain Map
Use the following trick to get to a map with the three Japanese characters made with mountains. When you are at the selection with: Design Maps-> Map or CO, highlight “Map” and hold L + R for a second.