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Sink Whole is a downloadable microgame in WarioWare: D.I.Y. and WarioWare: D.I.Y. Showcase. It was released on June 3, 2009 in Japan, May 3, 2010 in North America, and June 4, 2010 in Europe. The title for this microgame is a pun on "sinkhole".
There is a pool table with two balls on. The cue ball and the yellow-and-white 9 ball. The object is for the player to hit the cue ball with the cue stick so it will hit the 9 ball into the corner pocket. However, the cue stick is moving from side to side. The nine ball is already aligned with the corner pocket, so all the player has to do is tap the screen while the cue is in front of the ball. If this happens, the cue ball will hit the 9 ball and the game will be won. If the player taps the cue when it is anywhere else or if they don't tap the screen at all, the game will be lost.