Below you find how to Unlock Characters in Mario Kart 7: Each character will need to be unlocked at minimum 50cc and upto 150cc. See the list below on where you need to unlock each character and how. Mario Kart comes with 17 characters and 9 of them will need to be unlocked during the game.
Mario Kart 7 Walkthrough
Mario Kart 7 Tracks
Mario Kart 7 Cups
King Boo – Win 50cc Star Cup
Diddy Kong – Win all 50cc Cups
Baby Daisy – Attain at least 1 Star Rank for all 50cc Wii Grand Prix Cups
Mii (Outfit A) – Win 100cc Special Cup
Mii (Outfit B) – Unlock 32 Expert Staff Ghost Data in Time Trials
Mii (Outfit C) – Get 15,000 points in VS mode – *unconfirmed & probably fake
Dry Bones – Win 100cc Leaf Cup
Bowser Jr. – Attain at least 1 Star Rank for all 100cc Retro Grand Prix Cups
Daisy – Win 150cc Special Cup
Dry Bowser – Attain at least 1 Star Rank for all 150cc Wii Grand Prix Cups
Funky Kong – Unlock 4 Expert Staff Ghost Data in Time Trials
Baby Luigi – Unlock 8 Expert Staff Ghost Data in Time Trials
Birdo – Play Time Trials on 16 different courses/Get 250 wins online
Toadette – Play Time Trials on all 32 different courses
Rosalina – With a Super Mario Galaxy save, win a series of Grand Prix cups/Without Galaxy save, Attain at least 1 Star Rank for all Mirror Grand Prix Cup