Hey
Apparently my brother in laws Wii doesn't work with this game, just goes into the demo/quick play mod only, but his wii is completely softmodded (i did it my self), it definitely does not have a mod chip.
The softmod is a little old now though, its running Cioscorp 3.6 w/ Cios rev14 (pretty much followed the "mod any 4.2 firmware wii" guide thats on here when it was installing the Cios r14, and then Cioscorp 3.6 also for the disc channel stuff).
I wonder, since this game works with a softmod? coud it possibly be Cioscorp thats causing the game to think its got a mod chip. Im gonna get a hold of the wii+game on friday (just researching whats going on atm), i'll probably remove Cioscorp and update everything else unless anyones got any other ideas? (anyone tried playing this with Cioscorp?)