In Mario Kart Wii there are three Weight Classes: Light, Medium and Heavy.
- Light characters have high off-road (how much you are affected by grass and mud, etc, high being positive), high acceleration and somewhat low topspeed.
- Medium characters are balanced.
- Heavy Characters have low acceleration, low off-road and high top speed.
Light characters use small vehicles, medium characters medium vehicles, heavy characters, large vehicles.
Additionally, a heavier character may ram other lighter characthers, making them lose speed.
List of Characters
- Light: Baby Luigi, Baby Mario, Baby Peach, Baby Daisy, Toad, Toadette, Koopa Troopa, Dry Bones.
- Medium: Mario, Luigi, Peach, Daisy, Yoshi, Birdo, Bowser Jr., Diddy Kong
- Heavy: Wario, Waluigi, Donkey Kong, Bowser, Rosalina, Dry Bowser, Funky Kong, King Boo.