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Mario Kart

Unlockables
Star Cup
: Unlocking conditions; Grand prix- Finish Mushroom cup and Flower cup in 3rd place or better.
Special Cup: Unlocking conditions; Grand prix- Finish Star cup in 3rd place or better.
Leaf cup: Unlocking conditions; Grand prix- Finish Shell cup and Banana cup in 3rd place or better.
Lightning cup: Unlocking conditions; Grand prix- Finish Leaf cup in 3rd place or better.
Expert Staff Ghost: Unlocking conditions; Time trial- Beat the courses default time.
Karts and Bikes on 50cc cups: Unlocking conditions; 50cc- All cups finished in 3rd place or better.
Karts and Bikes on 100cc cups: Unlocking conditions; 100cc- All cups finished in 3rd place or better.
Mirror Grand prix mode: Unlocking conditions- Finish all 150cc cups in 1st place or play 4,800 games.
New title screen backgrounds: Unlocking conditions; Grand prix- All difficulties, all cups finished in 1st place.
Normal ending: Unlocking conditions; Grand prix- Finish both Special and Lightning cups in any cc class.
True ending: Unlocking conditions; Grand prix- All dificulties, all cups finished in 1st place.
Star next to your name: Unlocking conditions; Grand prix- All difficulties, all cups: Score star or higher.
2 stars next to your name: Unlocking conditions; Grand prix- All difficulties, all cups: Score 2 stars or higher.    
3 stars next to your name: Unlocking conditions; Grand prix- All difficulties, all cups: Score 3 stars or higher.
Gold Wii wheel next to your name: Unlocking conditions- Wii wheel usage above 50% AND play 100 games.

Unlockable Characters

Baby Luigi: Unlocking conditions; Time Trial-Unlock 8 expert staff ghosts or Win 100 WFC ghost races or play 3,150 games.
Baby Daisy: Unlocking conditions; 5occ Grand prix-Score star or higher in all Wii cups or play 1,950 games.
Toadette: Unlocking conditions; Time Trial-Complete all courses or win 1,000 WFC races or play 2,550 games.
Dry Bones: Unlocking conditions; 100cc Grand prix-Finish Leaf cup in 1st place or play 1,050 games.
Daisy: Unlocking conditions; 150cc Grand prix-Finish Special cup in 1st place or play 2,850 games.
Birdo: Unlocking conditions; Time Trial-Complete 16 courses or win 250 WFC races or play 1,350 games.
Diddy Kong: Unlocking conditions; 50cc Grand prix-Finish Lightning cup in 1st place or play 450 games.
Bowser Jr: Unlocking conditions; 100cc Grand prix-Score star or higher in all Retro cups or play 3,450 games.
King Boo: Unlocking conditions; 50cc Grand prix-Finish Star cup in 1st place or play 750 games.
Rosalina: Unlocking conditions; Mirror Grand prix-Score star or higher in all cups or play 50 games AND have Super Mario Galaxy save data or play 4,950 games.
Funky Kong: Unlocking conditions; Time Trial-Unlock 4 expert staff ghosts or win 25 WFC ghost races or play 2,250 games.
Dry Bowser: Unlocking conditions; 150cc Grand prix-Score star of higher in all Wii cups or play 4,350 games.
Mii Racing suit: Unlocking conditions; 100cc Grand prix-Finish Special cup in 1st place or play 1,650 games
Mii Plumber's costume: Unlocking conditions; Time Trial-Unlock all 32 expert staff ghosts or win 5,000 WFC ghost races or play 5,100 games.

Vehicles

Karts
Cheep charger
: Unlocking conditions; 50cc Grand prix-Score star or higher in all Retro cups or play 1,800 games.
Tiny Titain: Unlocking conditions; Time Trial- Unlock 1 expert staff ghost or win 50 WFC games or play 1,200 games.
Blue Falcon: Unlocking conditions; Mirror Grand prix-Finish Lightning cup in 1st place or play 4,200 games.
Super Blooper: Unlocking conditions; 50cc Grand prix-Finish Leaf cup in 1st place or play 300 games.
Daytripper: Unlocking conditions; 150cc Grand prix-Finish Leaf cup in 1st place or play 2,700 games.
Sprinter: Unlocking conditions; Time Trial-Unlock 24 expert staff ghosts or win 3,000 WFC races or play 4,650 games.
Piranha Prowler: Unlocking conditions; 50cc Grand prix-Finish Special cup in 1st place or play 600 games.
Jetsetter: Unlocking conditions; 150cc Grand prix-Score star or higher in all Retro cups or play 4,500 games.
Honeycoupe: Unlocking conditions; 150cc Grand prix-Finish Lightning cup in 1st place or play 3,000 games.

Bikes
Shooting Star: Unlocking conditions; 100cc Grand prix-Finish Star cup in 1st place or play 1,500 games.
Spear: Unlocking conditions; Time Trial-Unlock 12 expert staff ghost or win 200 WFC races or play 3,600 games.
Phantom: Unlocking conditions; Mirror Grand prix-Finish Special cup in 1st place or play 4,050 games.
Zip Zip: Unlocking conditions; 100cc Grand prix-Finish Lightning cup in 1st place or play 2,100 games.
Sneakster:Unlocking conditions; 100cc Grand prix- Score star or higher in all Wii cups or play 3,300 games.
Dolphin Dasher: Unlocking conditions; Mirror Grand prix-Finish Star cup in 1st place or play 3,750 games.
Quacker: Unlocking conditions; 150cc Grand prix-Finish Star cup in 1st place or play 2,400 games.
Magikruiser: Unlocking conditions; Time Trial- Complete 8 courses or win 5 WFC games or play 900 games.
Jet Bubble: Unlocking conditions; Mirror Grand prix-Finish Leaf cup in 1st place or play 3,900 games.