Why would you need that? You can just go online and get a friend code yourself.
Getting a savegame from anyone isn't going to help you with a ban (23917) or the 7-day initial waiting period.

I hope no one gives a MKWii savegame away. It does not help a regular player, but maybe a hacker. So if you give away a savegame, the probability is high, that the profiles and also the creating console is banned.