Press Right, I, Left, II, Up, Select, Down, Select at the
title screen. A sound will confirm correct code entry. Hold
Up/Right and press I + II + Select during game play to jump
to the next level.
Press Left, Right, I, II, Down, Select, Up, Select at the
title screen. Use the D-pad to display a two number sound
code at the bottom of the screen. Then, press I to play the
sound, or press II to reset the sound to zero.