King Boo's Puzzle Attack

King Boo's Puzzle Attack is a boss minigame in Mario Party 9.

Introduction
The camera is zoomed in on a window outside the tower. The view will then enter the tower; King Boo will appear next, laugh, and the items will then fall from above, followed by the cursors appearing.

Gameplay
The game involves the players trying to line up three or more of the same items to deal damage to King Boo. There are five items: Green Shells, Red Shells, Ice Flowers, Fire Flowers, and Thunderbolts. The former four will earn the player three points, while the lightning gives ten, along with reducing the other players points by three. After losing half his health, King Boo will send a Boo down to the playing field, in order to temporarily stun any player's cursor that makes contact with it; players must shake the Wii Remote to free themselves.

The player who lands the final attack adds an additional 10 points. Whoever has the most points is declared the winner.

Ending
King Boo will spin away and disappear, disappointed and several Mini Stars will then appear.

In-game text

 * Rules – "Line up three or more of the same item to launch an attack on King Boo. Line up lightning bolts for an extra powerful attack!"
 * Controls – "Hold the Wii Remote sideways. Press to move the cursor. Press  to select an item, then press up, down, left, or right on  to trade places with another item."

Trivia

 * This is the only boss minigame to give a final attack 10 points.