To get serten characters, beat the levels with those characters in it.
you can't unlock characters
You start off with every character. There are no secret characters to unlock.
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.
yes only one
10996-yoshi & mario
I don't think he deserves to get a Starship. One of the people on Starship Mario said that it looked more like Luigi.
You could get 24 characters in all
All characters are already available.
you can unlock luigi detective.
Simple, beat the game. Walk into after you beat the game and you have the option of being Luigi whenever you want!
Do cups. I think you unlock them by doing the 150cc on it.
There aren't any more characters in it.