All songs
At the title screen pick ARCADE MODE. When it says "Select Play Mode" Go to HARD and press RIGHT on the D-Pad 3 times. Then pick hard and dance the night away.
Character and Arrow Select
At the title screen pick ARCADE MODE. When it says "Select Play Mode" press the analog pad in any direction to bring up the charicter select and arrow select screen.
Select Vs, Double, Couple or Single Play Option
At the title screen pick ARCADE MODE while holding down the "B" button.
Unlock Little, Mirror and Hidden Modes
At the title screen pick ARCADE MODE. Select any play mode (easy, normal or hard). Now at the song selection press the analog pad in any direction then do the following to unlock the diffrent play modes: To unlock "Hidden" press U, D, U, D, U, D, U, D To unlock "Mirror" press L, R. L. R. L. R. L. R To unlock "Little" press L, D, R, D, L, D. R. D, U You can then toggle them on or off by pressing left or right.