Ghost House

Ghost Houses, listed in the Super Mario World manual as Haunted Houses, are large buildings where Boos and other ghosts live. They first appeared in Super Mario World and soon appeared in later Mario platformer games such as New Super Mario Bros. and New Super Mario Bros. Wii.

Super Mario World
Ghost Houses' first appearance was in Super Mario World, where there were six Ghost Houses in Dinosaur Land: two in Donut Plains, one inside the Vanilla Dome areas, one in the Forest of Illusion, one on Chocolate Island, and one in Valley of Bowser. As with Castles, Yoshi will stay outside of the Ghost House when Mario or Luigi enters. The given reason is Yoshi's fear of ghosts, but the technical reason is because the doors inside ghost houses (and castles) can't be entered while riding Yoshi, and some enemies located inside do not work properly with Yoshi.

New Super Mario Bros.
Several Ghost Houses are in New Super Mario Bros.; these introduced more new ghost species such as the Phantom Hand. The game also featured the exclusive Ghost House quirk of having Boos cover up the bottom screen while Mario or Luigi was inside a Ghost House.

New Super Mario Bros. Wii
The Ghost Houses from the previous game re-appeared in New Super Mario Bros. Wii, this time with Boos flying around them, just like in Super Mario World.

Super Mario 3D Land
In Super Mario 3D Land, Ghost Houses are found in World 4-4, World 6-3, World 8-4, Special 4-2, Special 5-5 and Special 6-5 of the game. Unlike Super Mario World, New Super Mario Bros. and New Super Mario Bros. Wii, Ghost Houses are considered as simple levels.

New Super Mario Bros. 2
Ghost Houses reappear in New Super Mario Bros. 2 for the Nintendo 3DS. Unlike in previous games in the series, the first Ghost House is encountered earlier in the game in World 2.

Other appearances
The mansion of Big Boo's Haunt of Super Mario 64 is a Ghost House. Sirena Beach's Hotel Delfino is similar to a Ghost House in many ways, as is World 2's fortress in Super Mario Bros. 3. Ghostly Galaxy from Super Mario Galaxy contains a ghost mansion which Luigi is kept in, and Boo Mushrooms as well. In Super Mario Galaxy 2, Haunty Halls Galaxy features a ghost house that is invisible unless Yoshi eats a Bulb Berry. The second, Boo Moon Galaxy, features a pop-up book with a ghost house, as well as a graveyard, and a ghost tower where Mario becomes Boo Mario.

Yoshi's Safari
The level Ghost Mansion in the game Yoshi's Safari is a large Ghost House. The level is full of Boos, Podoboos, Nipper Plants and a Lakitu boss that Mario and Yoshi must shoot down with the Super Scope. Mario and Yoshi will eventually reach the end to face Big Boo the level's main boss.

Paper Mario series
Boo's Mansion of Paper Mario and Creepy Steeple in Paper Mario: The Thousand-Year Door is a Ghost House. And also there will be one Ghost House at the new Paper Mario Game in production to be released to Nintendo 3DS.

Mario Party series
The boards King Boo's Haunted Hideaway from Mario Party 8, Boo's Horror Castle from Mario Party 9 take place inside Ghost Houses, inhabited by Boos and Scaredy Rats, as well as other creatures. Minigames that feature Ghost Houses are Locked Out, Eye Sore, Candlelight Flight, Light Up My Night, Ghost in the Hall, Boo-ting Gallery and Specter Inspector, Manor of Escape, King Boo's Puzzle Attack, Boo-Bye, Boo Tag, Peek-a-Boo.

Luigi's Mansion
Luigi's Mansion from the game of the same name is all Ghost House, as is its upcoming sequel, Luigi's Mansion: Dark Moon.

Dance Dance Revolution: Mario Mix
During Dance Dance Revolution: Mario Mix a Ghost House is found in Wario's Carnival. Though this so-called "Ghost House" is actually a traditional false haunted house (as seen in several real world carnivals), it actually contains Boos and the occasional Big Bubble.