Instructions
Load the Wii Sports disk into the Wii and select "Wii Bowling."
Choose the number of players and your Mii. To scroll through the options, point the Wii remote at the television screen and press the directional pad either left or right.
Press the "A" button when the warning about hitting people with your Wii displays on screen.
At this point (before the game starts), press and hold the directional pad for around two seconds. Press the pad up for a blue ball, down for green, right for yellow and left for pink. When your game begins, your bowling ball will be a different color.