Instructions
Win the 50cc Star Cup, gain a star in all of the 50cc's Wii-Cups and finish the Retro 50cc Cups. This gives you Baby Daisy and King Boo.
Receive a star in every 100cc Retro-cup, win the 100cc Leaf Cup and win the 100cc Special Cup to unlock Bowser Jr., Dry Bones and Mii in Outfit A.
Complete every 150cc Wii-Cup tournament and receive a star and win the 150cc Special Cup to unlock Daisy and Dry Bowser.
Run a Time Trial race on 32 courses to unlock Birdo and Toadette.
Complete all of the expert staff-level ghost data in Time Trial modes to unlock Mii Outfit B, Baby Luigi and Funky Kong.