Characters are the people and animals you can play as in Mario Kart Wii. The characters all have different stats and abilities. They are divided into three groups: lightweight, medium weight, and heavyweight. The lightweight ones are Baby Mario, Baby Luigi, Baby Peach, Baby Daisy, Toad, Toadette, Koopa Troopa, and Dry Bones. The medium weight ones are Mario, Luigi, Peach, Daisy, Yoshi, Birdo, Diddy Kong, and Bowser Jr. The heavyweight ones are Wario, Waluigi, Donkey Kong, Bowser, King Boo, Rosalina, Funky Kong and Dry Bowser. There are also two Miis. To Unlock Most Of the Characters, You need to Get a fast staff ghost in time trials (Beating the Normal Staff Ghost by a certain amount of time (Time may vary, Depending on Coarse) and by Winning A star rank/ Getting First in Grand Prix mode. Rosalina and Birdo are the only 2 Characters in the game to have 2 ways of unlocking them, Rosalina: (Easy) Have a save File In Super Mario Galaxy on your Wii-(Hard) Get a Star Rank in all of the Mirror cups. Birdo: (Easy) Play on 16 courses on time trials (Note: It doesn't have to be an expert staff ghost.) (Hard) Play around 250 races online (Note: Once the Nintendo Wii Online Service stopped working, This Method became impossible.)
Starter Characters[]
Baby Mario
Baby Peach
Toad
Koopa Troopa
Mario
Luigi
Peach
Yoshi
Wario
Waluigi
Bowser
Donkey Kong
Time Trial Characters[]
Funky Kong: Unlock 4 Fast Staff ghosts
Baby Luigi: Unlock 8 Fast Staff ghosts
Birdo: Play 16 races on time trials/Play 250 online Races
Toadette: Play Time Trials on all Courses
Mii Outfit B: Unlock All 32 Fast Staff ghosts
Grand Prix Characters[]
King Boo: Win 50cc Star Cup
Diddy Kong: Win 50cc Lightning cup
Baby Daisy: Get a 1 to 3 star ranking on every 50cc Nitro Cup (Mushroom Cup, Flower Cup, Star Cup, Special Cup)
Mii Outfit A: Win 100cc Special cup
Dry Bones: Win 100cc Leaf Cup
Baby Bowser/Bowser Jr.: Get a 1 to 3 star ranking in every 100cc Retro cup (Shell Cup, Banana Cup, Leaf Cup, Lightning Cup)
Daisy: Win 150cc Special Cup
Dry Bowser: Get a 1 to 3 star ranking in the 150cc Nitro Cups (Mushroom, Flower, Star, Special)
Rosalina: Score a star rank in every Mirror Mode cup/Have a save file of Super Mario Galaxy on your Wii
Unused Characters[]
Petey Piranha
Koopa Paratroopa
Hammer Bro
Mii Outfit C