I'm not really into the game, but if you list the PIN code (which can be used at Club Nintendo to earn points), I'll definitely bid on that. :) I'm all about Club Nintendo points right now!
Assuming you haven't registered it yet, of course. ^__^
Okay! Usually it's on a separate piece of paper where the manual is kept. Games made after Club Nintendo was created should say "Club Nintendo" on them, but games made prior will likely just say "Register your game" and have a PIN number (only games made by Nintendo itself will have these numbers).
I believe this game came out just prior to Club Nintendo coming to America. It would be so awesome if you have it, and I'll definitely bid (I'm guessing by your reply you haven't registered it, either. A registered code will do no good ^_^;).