The Wii itself will inform you that specific data cannot be transferred. I think it has to do with Nintendo trying to make sure nobody loses rating points thens restores their record from better days..
I would have preferred it if they allowed you to transfer your non-Wifi data, and simply zeroed the Wifi records on the SD copy of the save. Restoring that save would simply place you back at a zero record, but you'd still be able to backup other important stuff and even take it over to a friend's if he still doesn't have everything unlocked.
I didn't flame, I applied sarcastic irony to a simple question. - The Chrono Master Currently Playing: Super Smash Bros Brawl