Para Para Paradise Cheats

Go all the way to the right when choosing difficulty (Hard), and hold the Right selection button down for two seconds until it moves past Hard to Expert.

To enable the extra options for ''Hi-speed mode'' (arrows move faster), ''Hidden mode'' (arrows dissapear halfway up the screen), ''Sudden mode'' (arrows only appear halfway up the screen), and ''Shuffle mode'' (random arrow position), hold both the song select buttons down until an extra screen appears. Scroll through the options with the song select buttons and press the ''OK'' button to toggle them on and off. Press ''OK'' on EXIT when you're happy with your selection.
For ''Stealth mode'' (no arrows appearing) just turn on both ''Sudden mode'' and ''Hidden mode''... and if you're feeling really confident, turn on ''Shuffle mode'' as well. :)