By Beating cups
When you hack the game.
Get gold trophy in grand prixs to unlock karts and characters.
Karts. It can have longer turbo boosts.
You do an amount of races or you can finish cc's.
King Boo, Bowser, Dry Bowser, Rosalina, and Funky Kong all use large karts on Mario Kart Wii.
They Are Exactly the same cups in the same order as Mario Karts DS
you have to unlock the different karts by racing the world cups.
That's completely opinion based.
If you want to use Wi-Fi on either Mario Karts (Mario Kart Wii, Mario Kart DS) you must make sure you have a strong WEP connection.
To get 36 karts on "Mario Kart DS", you have to come in first on every race and cup.
Yes. If you hack Mario Kart, your Mii will come out looking a little strange, even if you change it. Plus I think your Karts are not as fast as usual.
Actually, Baby Mario has 6 karts (if you can unlock them) in Mario Kart Wii. He has the Standard Kart S, Baby Booster, Concerto, Cheep Charger, Rally Romper, and Blue Falcon. For the 6 bikes, he has the Standard Bike S, Bullet Bike, Nanobike, Quacker, Magikruiser, and Bubble Bike.