In Mario Kart Wii, if you are riding a motor bike, doing wheelies can give you an extra boost of speed. Here’s how:
Whenever you come across a point in the race when you will be going straight for a bit, build up as much speed as you can. Once you have a lot of speed built up, pop a wheelie by shaking the Wii-wheel and angling it upward as though you were really riding a bike. You won’t be able to steer, but you will get a nice little boost of speed.
The amount of speed you get from the wheelie will be related to how much speed you had when you started it. So it’s a good idea to do this when you’ve just finished a jump or using a mushroom.