How do you unlock stuff on Mario Kart wii?

Answer 1

There are many things you can do to unlock things. First off, you can complete Cups in the Grand Prix to earn more tracks, characters and karts. Another thing you can do is to beat staff records in Time Trials, usually the more records you beat, the more characters you unlock. A third way to unlock things is to race. A lot. I mean A LOT!!! If you have thousands apon thousands of races, you can unlock characters without beating any time trials. The fourth and final way to unlock characters is to have certain save data on your Wii. You can unlock 1 secret character if you have save data for Super Mario Galaxy 1 on your Wii's memory. It doesn't even have to be your own save data...you can borrow someone else's memory card.