No, the only way you can unlock him is to get a rank star in all 100cc races I'm afraid. (but I've done it so you'll get it soon!)
Sorry, I dont think giga bowser is a character in Mario Kart Wii.
you only get dry bowser. bowser jr and bowser/ /not golden bowser
You sure can.
I think you can in Mario Kart for wii.
In Mario Kart Wii you have to get a rank star or more on all of the 150cc grand prix cups
No
You unlock Dry Bowser
He definitly can't
King Boo, Bowser, Dry Bowser, Rosalina, and Funky Kong all use large karts on Mario Kart Wii.
Dry Bowser is Bowser, dead. In bones. Bony Bowser. To unlock him, unlock Funky Kong. I think...
You don't. You can use it from the beginning of the game.
N64 Bowser's Castle in the lightning cup