Extra Game Options
At the Title screen, hold B while choosing Arcade Mode to unlock new options.

All Songs
Choose Arcade Mode, then at the Difficulty Selection screen, highlight Hard. Then press Right, Right, Right, choose Hard, then begin the game.

Hidden Mode Option
Choose Arcade Mode, then choose any difficulty setting. Now while holding the Analog-Stick in any direction, press Up, Down, Up, Down, Up, Down, Up, Down.

Mirror Mode Option
Choose Arcade Mode, then choose any difficulty setting. Now while holding the Analog-Stick in any direction, press Left, Right, Left, Right, Left, Right, Left, Right.

Little Mode Option
Choose Arcade Mode, then choose any difficulty setting. Now while holding the Analog-Stick in any direction, press Left, Down, Right, Down, Left, Down, Right, Down, Up.