To unlock everything, here you are...
Unlockable Characters:
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
Unlockable Karts:
Cheep Charger (small kart) - Attain at least 1 Star Rank for all 50cc Retro Grand Prix Cups
Blue Falcon (small kart) - Win Mirror Lightning Cup
Rally Romper (small kart) - Unlock 1 Expert Staff Ghost Data in Time Trials
Turbo Blooper (medium kart) - Win 50cc Leaf Cup
Royal Racer (medium kart) - Win 150cc Leaf Cup
B-Dasher (medium kart) - Unlock 24 Expert Staff Ghost data
Piranha Prowler (large kart) - Win 50cc Special Cup
Dragonetti (large kart) - Win 150cc Lightning Cup
Aero Glider (large kart) - Win all 150cc Retro Grand Prix Cups with 1 star or better
Unlockable Bikes:
Quacker (small bike) - Win 150cc Star Cup
Bubble Bike (small bike) - Win Mirror Leaf Cup
Magikruiser (small bike) - Play Time Trials on 8 different courses
Rapide (medium bike) - Win 100cc Lightning Cup
Nitrocycle (medium bike) - Attain at least 1 Star Rank for all 100cc Wii Grand Prix Cups
Dolphin Dasher (medium bike) - Win Mirror Star Cup
Twinkle Star (large bike) - Win 100cc Star Cup
Phantom (large bike) - Win Mirror Special Cup
Torpedo (large bike) - Unlock 12 Expert Staff Ghost Data in Time Trials
Misc Unlockables:
Picture option to send to Wii Message Board - Complete all 8 Cups in a class
Karts & Bikes (50cc) - Earn trophies in all 50cc Grand Prix Cups
Karts & Bikes (100cc) - Earn trophies in all 100cc Grand Prix Cups
Mirror Class - Win all 150cc Cups
Alternate Title Screen - Win all Cups
Expert ghosts
Defeat a normal course ghost with a time at least seven seconds faster to unlock the expert ghost for that course.
Alternate title screen and ending sequence
Get a "One Star" rank or better in all Cups, including those in Mirror mode to unlock an alternate title screen and ending sequence.
Special credits
Win all trophies in a class to view the credits and see a congratulations screen featuring your Mii with Mario and Peach. Win all Grand Prix Cups to get another congratulations screen featuring your Mii with all the racers.
Quick start
When the countdown starts, wait until the "2″ begins to disappear, then hold 2 to get a boost at the start of the race.
Quick recovery
When you fall into an obstacle, press 2 precisely when you land to get a temporary boost.
Profile name stars
You can add a star next to your profile name on the results screen and the Wi-Fi races by completing all Grand Prix races with a certain rank:
One star profile name: Earn a "One Star" rank in all Grand Prix races.
Two star profile name: Earn a "Two Star" rank in all Grand Prix races.
Three star profile name: Earn a "Three Star" rank in all Grand Prix races.
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More Mario Kart Wii coverage on WiiNintendo:
Mario Kart Wii Soundtrack (mp3 download)
Watch my 2 hour video of all 32 tracks, direct feed 150cc!
Mario Kart Wii shortcuts video
Share your friend code and setup/join competitions in our forums
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How to avoid the POW block:
Shake the wii remote as soon as the POW block is very small.
To avoid blue shells
Use speed when it is about to pound on you.
Hope this helps :)
there is no cheat for it
try ceatcc.com to get the answer.
you get coins
there is no goomba to unlock 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.
You can't unlock Pauline in Mario Kart Wii,he isn't in that game.
To unlock different characters, vehicles, and stages on Mario Kart, you either have to play a lot of matches under the tournament section, or be very good at them. Playing battles also helps, but I've never done that and I've unlocked nearly everything there is on Mario Kart.
there is no baby rosalina in Mario kart.
You cannot unlock Baby Mario in Mario Kart DS. He is only in Mario kart: Double Dash!!! and Mario Kart Wii.
Wiggler is not unlockable in Mario Kart Wii.
There is no diddy kong in Mario kart
You can't unlock Bowser Jr on Mario Kart DS.