Suggestion:
no,the data that you played for all goes on your wii console that you played it on.But if you play the game on a different wii,It will just start a new file on that wii.But it won`t delete anything on your wii.Games will just save on wii system,not the disc.Even if you have a SD card to save that game,so you can take it to other wii.You can`t,Just because of the Friend codes.
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no its not all the data is saved on the wii itself not the disc
Okay okay okay first off, the games aren't saved on the CD itself.
Its saved on YOUR console.
So none of the 'saved' stuff you did on your console will be on another console.
its the same concept as a computer, its all saved on the wii. dont worry bout it.