Tic-Tac-Glow

Tic-Tac-Glow is a mini-game that appears in Mario Power Tennis game. The game is in Delfino Plaza Court, which the player must shot water balls to the opposite field filled of goop (3x3 goop spots) to free Shine Sprites. Rules are: This game has the same Tic-Tac-Toe style play.
 * Turn on a water nozzle to receive a water ball.
 * Obtain points making a line on the goop spots.
 * Make again this, then Piranha Plants will soil again to accumulate points for you.
 * Obtain max points on a restrict time.

Trivia
This is the only minigame that has players take turns.