Unlock the following bonus tricks to either help get a strike or counteract a dirty trick:
Rocket - This trick gives you a "guaranteed strike" if you aim directly at the elves. When the rocket is armed, the aiming device will swing back and forth across the elves. Click the mouse when it aims anywhere on the elves. If you wait a few seconds the aiming device may slow down.
Grow Ray - Depending on type obtained, this can grow the size of your ball, the size of the gutters (eliminating them or returning them to normal size) or the size of the elves (making them easier to hit or returning them to normal size).
Boxing gloves - Two boxing gloves on springs attach to either side of the ball giving you a chance to sweep all the elves away.
Extra speed - Places a patch on the lane that gives your ball a burst of speed that leaves burn marks on the lane and knocks elves away.
3x Bonus - Opens a slot machine that can give you a random combination of three bonuses and/or three dirty tricks or nothing.
Basketball - Turns your bowling ball into a basketball, which allows you to rebound off the elves and knock them down by slightly moving the mouse to the left or right. This can guarantee a strike if you can keep it in play. The basketball is also impervious to the electric field.
Rock Ball - The rock ball does not skid on oil slicks and explodes on impact.