Baby Daisy: Get a "One Star" rank or better in all 50cc Cups.
Baby Luigi: Unlock seven Expert Staff Ghost Data** in Time Trials mode.
Birdo: Play 16 different courses in Time Trials mode.
Bowser Jr.: Get a "One Star" rank or better in all 100cc Retro Cups.
Daisy: Win* the 150cc Special Cup.
Diddy Kong: Successfully complete all 50cc Cups.
Dry Bones: Win the 100cc Leaf Cup.
Dry Bowser: Get a "One Star" rank or better in all 150cc Wii Cups.
Funky Kong: Unlock four Expert Staff Ghost Data in Time Trials mode.
King Boo: Win the 50cc Star Cup
Mii (Outfit A): Win the 100cc Special Cup.
Mii (Outfit B): Unlock all 32 Expert Staff Ghost Data in Time Trials mode.
Rosalina: Get a "One Star" rank or better in all Mirror Mode Wii-Cups. Or if you have a saved game file from Super Mario Galaxy, you should win 50 Grand Prix races.
Toadette: Play on all 32 courses in Time Trials mode or win 1,000 Wi-Fi online matches.
* Winning a Cup means getting first place.
** Expert Staff Ghost Data itself is unlocked by beating a regular staff ghost by 10 seconds.
Read more: http://www.videogamesblogger.com/2008/04/18/how-to-unlock-all-mario-kart-wii-secret-characters-bikes-karts-and-more-guide.htm#ixzz0m45kq0HB
You have to get gold on all of the grand prix on the 50cc 100cc and 10cc.
I usually go on Google and if you type in "Ways to unlock all of the Mario kart wii characters" a website will come up with a full sheet of how to do that,
There is only one unlock in the Grand Prix - the Mirror Cup. This is unlocked by getting a Gold Cup on each Cup in each CC - the 50, 100 and 150. Gulp...XD
You go to ign.com/Mario kart Wii to see the unlockables and cheats
there is no goomba to unlock in Mario kart wii
You can't unlock Pauline in Mario Kart Wii,he isn't in that game.
Wiggler is not unlockable in Mario Kart Wii.
If you need to unlock her in Mario kart wii here is the answer: Win the 150cc Special Cup. If you need to unlock her in Mario Kart 7 here is the answer: Win the 150cc Mushroom Cup. Source: I beat Mario Kart Wii, and I unlock Daisy in Mario Kart 7.
There is no 300cc cup on Mario Kart Wii.
ROB is not in Mario Kart Wii, he is only in Mario Kart DS.
Baby Mario is already one of the starting characters on Mario Kart Wii.
Rob is not in Mario Kart Wii.
You can not get ROB in Mario kart wii, only in the DS version of the game.
You can't unlock toad on mario kart Wii.Toad is already there.
In Mario kart wii you have to win the 150cc special cup
No, there isn't