DS Luigi's Mansion

Luigi's Mansion is the last race course of the Mushroom Cup in the game Mario Kart DS. Outside the mansion is Boo Woods which has a graveyard surrounding the mansion and beyond it, a swamp of mud with moving trees. When a character runs into one of these trees, instead of spinning out or rolling over, the character instead will just get stuck on the tree as if it were a wall.

Racers start outside the mansion in a section of Boo Woods, and they will go through a curl path to the entrance of the mansion, running along a narrow hall that leads the racers downwards to a room beneath the lobby. Various portraits of Portrait Ghosts from Luigi's Mansion can be seen hanging on the walls. The racers then go out of the mansion, crossing a stone path tunnel, where they reach the graveyard, leaving the mansion. Finally, racers end up crossing the swamp to cross the checkered line.

Missions
Missions 1-6 and 2-4 take place on this course, with Luigi driving in both of them.

In mission 1-6, the player has to exit the mansion in reverse, and in mission 2-4 the player must destroy 5 item boxes.

Mario Kart 7
Luigi's Mansion appears as a Retro course in Mario Kart 7 as the final track in the Shell Cup. The only changes are the ramp that lets racers use gliders, and the Boo and the portraits are replaced by solo arts of Boo who attempt to pop out when the racer passes. The mansion's foyer has been redesigned to more closely resemble its original appearance, instead of the relatively simple single-story room seen in Mario Kart DS. Also, there is a glider ramp towards the end of this course in the muddy swamp and another glider ramp is added in the graveyard section. Additionally, part of the gate wall leading to the swamp is broken as a small shortcut to cross through with one Mushroom.

Halloween Tour
In the Halloween Tour, Luigi's Mansion appears as the first course in the Luigi Cup, the second course in the Shy Guy Cup, the location of the challenge in the Baby Luigi Cup, and the location of the challenge in the King Boo Cup. It also has a Reverse variant which appears as the second course in the Waluigi Cup, and a Trick variant which appears as the third course in the Rosalina Cup and the second course in the King Boo Cup.

Paris Tour
In the Paris Tour, Luigi's Mansion appears as the third course in the Luigi Cup, the second course in the Roy Cup, the location of the challenge in the Baby Luigi Cup, and the location of the challenge in the Dry Bowser Cup. It also has a Reverse variant which appears as the first course in the Bowser Cup, as well as a Trick variant which appears as the first course in the Lemmy Cup and the third course in the Metal Mario Cup.

Official descriptions

 * European website: "After rescuing Mario from the dark dungeons of this dreary old place, Luigi has decided to make some money from his mansion by turning it into a racetrack. Perpetual darkness means you'll need your headlights on for this one, especially since the trees have a tendency to walk around..."

Trivia

 * The Boos that pop out of the portraits in Mario Kart 7 were originally going to appear in Mario Kart DS.
 * Luigi's Mansion is the only Luigi-themed race course in the series that isn't a "Circuit" type course.