Honestly, Chip-Chan Kick is the only reason why I could see owning a PCFX. I can't read Japanese so that eliminates a lot of great titles. Is it possible to crank up the difficulty on this game so that it offers more replay value?
You can choose the difficulty level in the game option menu (Easy, Normal, Hard).I think also that you can adjust the number of lives you have. I don't know about the replay value of the game because till yet I haven't managed to beat it.
One feature which adds a lot for me, is the fact that it saves the scores. That's a thing that not so many games do.
All in all I can recommend Chip Chap Kick, I like it!