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 mid-boss of this board which is fought in a boss fort is a giant Dry Bones. The stage 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 then ride up the steps and go through the front door. They then arrive in a room in which they navigate through. The players eventually ride out the left side which is where the boss fort is and where a mid-boss (Dry Bones in solo mode) is fought. After that the players then enter the castle again. The players head through more rooms and then up more stairs. The players eventually reach the the roof which they navigate through and finally reach the uppermost tower where the bowser gate and a Stage Boss (King Boo in solo mode) is located. In order the stage boss, each player must roll high numbers to reach a certain number to open a gate to fight him otherwise they would have to do another lap of the last section. The main gimmick that appears the most here are the Boos that come out of mysterious pictures. These particular boos follow the players, and the boos move three spaces each turn. If they hit the captain player, the player will then lose Mini Stars. This board seems to be a reference to Ghostly Galaxy, which may have been a reference to Luigi's Mansion.

Scaredy Rat Race
In this Captain Event, a Scaredy Rat appears and steals two, three or fur Mini Stars from each player depending on how many players there are. The players give chase, still riding their vehicle. The Scaredy Rat rolls a 1-3 Dice Block to escape along a course featuring several Dash Spaces, and the players roll standard 1-6 Dice Blocks in an order determined by the captain. If a player catches the Scaredy Rat, that player earns all of the stolen Mini Stars and the event ends. The event also ends if the Scaredy Rat reaches the end of the path and escapes, meaning that no player recovers the Mini Stars.

Dry Bones Battle
The players start on a rock platform. Dry Bones then 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 after they flip.

King Boo Battle
The battle starts out showing the inside of a tower in Boo's Horror Castle. King Boo appears and the battle begins. The players must line-up pictures of the same power-up. Once three or more are in a row, they will fly at King Boo doing damage. The player will get one point for each extra lined up (for example: If four Fire Flowers are in a row, the player will get four points). If the player lines up three Lightning Bolts, they will unleash a powerful attack giving the player ten points. Once King Boo is at orange HP, he will send Boos to do his bidding. The Boos chase the player's marker. If the Boos capture the player's marker, it will freeze and the player will have to shake the Wii Remote to break out.

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."