Polterball is a downloadable microgame in WarioWare: D.I.Y. and WarioWare: D.I.Y. Showcase. It was released on October 14, 2009 in Japan, September 13, 2010 in North America, and October 15, 2010 in Europe.
Gameplay
At the start of the game, a guy is rolling a pinball to roll down a hill to hit a ghost, but there is a gap that only the flipper can fill. Hit the button too late, the ball will be flicked off the screen, avoiding the ghost. The idea is to press the button right away so that way the ball can roll over the flipper. Sometimes the ghost is in the air. Then the flipper shouldn't be used to bridge the gap but rather be timed to flick the ball.