Mario Kart (Wii)

Starting Characters

Baby Mario, Baby Peach, Toad, Koopa, Mario, Luigi, Yoshi, Peach, Wario, Waluigi, Donkey Kong, Bowser

How to Unlock Stuff Through Game Play

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

Glitches and Cheats

More than one person can be the same character

First, make P1 choose the character you both want to be. Then unselect the character and move off of it. Move P2 over, and select the character. Go back one screen, then go into the character select again. You should both be on the same character. Both of you select the character. Do whatever you want from there on.

Note: In the character select screen and options, whenever one of you does an animation, both of you will. Also, if P2 chooses a different kind of vehicle than P1, P1 will look strange. Don't worry, this won't actually happen in the game.

I haven't tested this with P3 or P4 yet, but in theory, it should work.

REF: BTAxBTA