There are eight characters of each weight class. The cast of characters has 19 returning characters from the series and six new characters Baby Peach, Funky Kong, user-created Miis, Rosalina, Dry Bowser, and Baby Daisy. Twelve characters are available from the beginning the other twelve and the two Mii variants become available after finishing certain elements of the game. In addition to this, there are 12 different kinds (3 weight classes, 2 genders, 2 outfits) of the Mii, the digital avatar made by Nintendo. Mario Kart Wii has 24 selectable Nintendo characters, more than any of the other Mario games. One new item to the series is the 'Lightning Cloud', which raises the user's top speed briefly, but shrinks the user if it is not passed on to an opponent by colliding with them. allows the character to send a shockwave to all the players in front of them, spinning them out of control and making them drop any items they may be carrying (there is no effect, however, on those who are airborne). It allows the character to grow very big in size and flatten other players. New items from Mario platform games are introduced, like the 'Mega Mushroom' from New Super Mario Bros. Players get items by driving through item boxes, which can be used for either defense, offense, or for powering up the engine. Plus, up to twelve characters can play in a race. Mario Kart Wii has 32 different tracks, having 16 new tracks, four tracks each from Mario Kart 64, Mario Kart: Double Dash!!, and Mario Kart DS, and two each from Super Mario Kart and Mario Kart: Super Circuit. Each car has seven different parameters for characteristics: speed, weight, acceleration, handling, drift, off-road, and mini-turbo.

A character's weight decides the available types of karts and motorbikes, and their performance on the tracks. The cars are classified into three different weight classes. In Mario Kart Wii, players choose a character from a roster having of up to 24 characters and from 36 cars.

Mario kart wii download free