If you have a PAL Wii, don't waste your time and money getting the Jap Wii Fit package. Nothing works. Here is what I put on another forum.
"i did the stupidest thing, first updated my PAL wii to USA firmware with Mario Galaxy then updated with Wii Fit to Jap firmware and then back to Pal firmware with Mario Galaxy. My Wii remains semi-bricked, can't access the Wii settings. I also bought a Jap Wii Fit package with the balance board and tried to play it on my machine. Even the board doesn't sync with my machine. I bought it as a present for my other half. The only reassurance is that the console still play games. Any advice with fixing this problem will be much appreciated. Also I have got another (2+2) 4 additional news and weather channels."
Also don't let your chipped console update with the wrong region firmware (which often comes with downloaded/backup games). I didn't know that when I got mine chipped.