Super Hard Mode:

Shake the left maraca high 15 times quickly at the difficulty selection

screen.

Random Mode:

Shake the left maraca low 15 times quickly at the difficulty selection screen.

All Music Mode:

At the height selection screen in arcade mode, shake the left maraca high

15 times quickly to unlock all songs.

GameShark Codes

Unlock All Challenge Lvls 
5E97B80505050403
8373825200000005
 
     

Thanks to Revolution reader Ren!