yea but i has to fit duhhh
Mario can have 8 karts and 8 bikes.
That's completely opinion based.
For the karts the Wild Wing. For the bikes the Mach Bike.
Karts go faster, but bikes can wheelie for more speed.
You have to complete certain cups, and do certain trials but you can only get them on single player!
you have to complete certain things to unlock stuff. this website shows you how to unlock everything, including karts. http://www.videogamesblogger.com/2008/04/18/how-to-unlock-all-mario-kart-wii-secret-characters-bikes-karts-and-more-guide.htm
If your playing multiplayer there are options in the corner of the screen or if you use a wii remote in grand prix to allow you to use karts and bikes in 50cc.
To get Rosalina, you have to have a New Super Mario Galaxy save file. Also, you have to beat time trials to unlock certain characters and bikes.
Bikes, you drive like normal karts but they are a little different. You can do wheelies if you jerk the Wii wheel up (but you can't steer during a wheelie) to go back Dow you Jerk the Wheel down. Bikes are sometimes harder to control with two wheels but like I said, are pretty much like Karts
No, Baja motorsports does not sell water bikes. They only sell ATV's, dirt bikes, go-karts, minibikes, and scooters. They also sell certain bike parts.
You are legally aloud to ride go karts and pocket bikes on public roads.
There are 30 different vehicles further split into 15 bikes and 15 karts, and even further split into Small, Medium, and Large categories. There are 26 characters, counting Mii A and Mii B as separate.