Woo! The english version!
The Japanese version was released two days ago. Look four or five roms back, it's called something something island.
As I said in the Japanese thread, this game can be quite fun. You use the face buttons to control the top screen, occasionally finding a button which triggers a warioware style minigame in the bottom screen. It requires you to use both, which is quite doable.
You can also wifi to have one player control each.
A hint for anyone playing it, the shoulder buttons double as action buttons, making wielding a stylus and the buttons easier.
Also, if anyone works out how to kill the music boss, please let me know.