Wii Sports/Bowling

Controls
Use the D-Pad to aim left or right. Press A to switch between moving left and right to facing left or right. When you are happy with your aim bring the Wii remote up to you then hold B and swing back, then swing forward releasing B when the controller is facing down.

Unlock
Become a pro at the game then you will get a shiny bowling ball to play with.

Other
If you get your aim and throw correct then you can get your bowling ball into other players' lanes.