Boo's Horror Castle

Boo's Horror Castle is one of the seven boards of Mario Party 9. The players ride in a magic carpet-like vehicle. The captain seems to be holding a lantern. The miniboss of this board which is fought in a boss castle is a giant Dry Bones. The actual boss which is fought at the top of the castle and through a Bowser Gate is the dreadful King Boo.

Layout
The players start out in the front yard of the castle. They ride up the steps and through the front door. They arrive in a room which they navigate through. The players eventually ride out the left side which is where the boss castle is and where the Dry Bones is fought. After that the players enter the castle again. The players eventually reach the the roof which they navigate through and finally reach the uppermost tower where the bowser gate and King Boo are located. The main gimmick that appears most here are the Boos that come out of mysterious pictures. These particular boos follow the players, and the boos also roll a dice. If they hit the captain player, the player will lose Mini Stars. The castle has many rooms such as: Lobby, Kitchen, Front Yard, Left Yard, etc. All the rooms may be a reference to Luigi's Mansion.

Dry Bones Battle
The players start on a rock platform. Dry Bones appears then leaps into the air. A lot of cards appear on the screen then flip. The player must memorize what colour is on each cards. Dry Bones lands on a colour. The players must choose which colour Dry Bones is on to damage him. The more damaged Dry Bones is the more colours appear. Sometimes the cards moved when they appear.

King Boo Battle
The only thing known about this battle is that it is like a puzzle and power-ups are involved.

Official Description

 * Flag of USA.png "Spooky... This haunted castle is infested by Boos and Scaredy Rats. Look sharp!"
 * Flag of Europe.png "As you and your party make your way through Boo’s Horror Castle on a floating bed, do your best to stay ahead of the ghostly Boo - who gives chase once you pass his portrait and helps himself to half of the Captain’s Mini Stars if he catches up."