Beat Mania Codes -

Hidden Mode 1:
Hold L + R (the two back keys on the Beat Mania controller) and press Start when the menu with the "Press Start Button" selection appears. Release those buttons and press Left + X (the two white keys on the left and right side). A sound will confirm correct code entry. The "Hidden Mode 1" option will now be available.

Double play mode:
Hold Left + Square + X (the three white keys) and press Start when the menu with the "Press Start Button" selection appears. Release those buttons and press L + R (the two black keys). A sound will confirm correct code entry. An option for double play mode will now be available.