However, we've heard from NWF reader Nils that this isn't true, and an imported copy of Mario Kart has worked just fine on his Wii (we're still waiting to hear back on what version he imported). Still, we're sure Play-Asia wouldn't make such things up, since this will only lead to the site losing sales. So, at this point, just be cautious with your imports, and let's hope that Datel's Freeloader isn't outdated already.
We'll update the post if we find or hear more accounts from Mario Kart Wii importers, so be sure to tip us if you've tried it first hand.
[Via Go Nintendo]