Doesn't look like it, at least if the game's roster ends up consisting of the characters that were seen in the trailers.
My favorite character is (Mario)Luigi. But really, it is my Mii!
Wiggler is not unlockable in Mario Kart Wii.
Wiggler
No, Boo isn't in Mario Kart Wii.However, King Boo is unlockable in the game by winning a gold trophy in the 50cc Star Cup.
No Rosalina doesn't. But the stars are like her kids... kinda
No, Mario is not playable in the game. The only playable character is Wario.
Finish the tournaments with any character.
No.
My favorite character is (Mario)Luigi. But really, it is my Mii!
Wiggler is not unlockable in Mario Kart Wii.
no, he is not a playable character in super paper mario.
You cannot get Shadow Mario as a playable character in Mario Superstar Baseball.
Bowser is not a playable character.
wiggler is a boy.
Mario is not a playable character although you can play as him only as a custom character using game maker 8.
Dr Mario, Pichu, Roy, Young Link and Mewtwo
Like Mario Kart Double Dash you can unlock him and in some Mario Marioparties.