sure
Go to Youtube.com they have friend code videos for Mario Kart Wii.
Mario
i don't think you can only if your friend has Mario kart ds
No
Fte4g1r
Check the comments for friend codes.
first go to Mario kart channel in the game.then go down to the last selection and it will tell you if you want Mario kart channel.press A and then wait a few minutes and you will get Mario kart channel.
If you want to use Wi-Fi on either Mario Karts (Mario Kart Wii, Mario Kart DS) you must make sure you have a strong WEP connection.
I think it should be for DSi like while you play Mario kart wii a friend that has a DSi can connect and play.
It is random my friend got a kart at 5000 coins that I got at 100 coins
2341-7052-9964
Well, you need Super Mario Galaxy (or borrow it from a friend). Simple start a new game and save it. Then, play 50 races in Mario Kart Wii. Then you will get Rosalina.