You have to beat the first championship then play the next championship to unlock volcano level in Madagascar Kartz Wii
If your playing multiplayer there are options in the corner of the screen or if you use a wii remote in grand prix to allow you to use karts and bikes in 50cc.
Get points
I have Mario Kart Wii and played it lots of times. I don't think you could unlock more characters. Or if you could, IDK.
You could get 24 characters in all
There is no maniac in Mariokart Wii. Check out the characters that you can get by asking this question in the green tab: "What characters can you unlock in Mariokart?"
Do cups. I think you unlock them by doing the 150cc on it.
You can unlock Peach, Jessica, Dragonlord, and Patty.
win 150cc to unlock
Get gold trophy in grand prixs to unlock karts and characters.
i will get some unlock in wwe 12
To unlock Characters in Mario Kart Wii you must beat the single player races. When you get a gold trophy in all of the races and a star ranking in all the races you will have all the characters