Level
Light-Switch Mansion
World	Fungi Mines
Game	Super Mario Bros. Wonder
Difficulty	★★
Primary power-up	Fire Flower
Wonder Effect	SummonsKing Boo to chase the players and sing "A Night at Boo's Opera", alongsideBoos andNoknoks
Music sample
Level progression ← Previous Loyal Poplin's House Next → — Super Mario Bros. Wonder courses

Light-Switch Mansion is a level inSuper Mario Bros. Wonder. This level takes place in a haunted mansion full ofBoos; it is the onlyGhost House-themed stage in the game. There are alsoLight-Switches that activate lights for a short time, revealing the locations of invisible blocks. It is found in theFungi Mines, in the first area of the world. The level is initially hidden by fog, but can be revealed if the player gets close to it. It contains twoWonder Seeds.

Layout[edit]

The player starts in an area where four Boos guard adoor. This room has a Light-Switch that activates the lights to both reveal the invisible blocks and to defeat the Boos in the area. After entering the door, the player must get through a hallway with more Boos, invisible blocks and lights. Along the way areNoknoks disguised as normal doors, some of which lead to new areas. After the first two Noknoks is a checkpoint.

After the first checkpoint is a bridge of invisible blocks that move once nearbyWow Buds are activated. There are then three rows of invisible blocks moving in spiral patterns, with Boos floating close by. After this section is a door close to what seems to be a pit, but invisible blocks create a bridge for the players. Entering this door will lead the player to the goal, but going across the bridge will lead the player to the second checkpoint.

Past this checkpoint is a door that leads to a seemingly empty area where aWonder Flower is. Upon collecting the Wonder Flower,King Boo appears and starts chasing the player down a hallway with chandelier platforms, lots of Boos, and more Noknoks. King Boo and the enemies sing "A Night at Boo's Opera" during this Wonder Effect. The player can look at King Boo, softening and muffling his singing, but he will continue to move. Near the end of the hallway is the Wonder Seed above a chandelier, appearing once the song is complete. When the Wonder Effect ends, King Boo will shrink into a regular Boo. TheGoal Pole is found through a door shortly after, with a staircase of invisible blocks.

Hidden Character Blocks[edit]

• ALuigiHidden Character Block can be found in the second area of the stage, near the first10-flower coin. It is located on the wall of an invisible L-shaped platform, which is ten blocks away to the left from the flower coin. It contains a singleflower coin.
• ADaisy Hidden Character Block can be found three blocks above the secondLight-Switch after the firstCheckpoint Flag of the level. It contains a1-Up Mushroom.

10-flower coins[edit]

Image	Location
	Protected by invisible blocks early in the level. The player must collect it from the right side, as the left side is blocked.
	In the background where the second Noknok is. The player must defeat it to enter its door to reach the background. Like the first 10-flower coin, it is protected by invisible blocks with an opening to the right of the coin.
	In the area where three rows of invisible blocks are moving in spiral formations. The coin itself is above the third row of blocks, close to Boos.

Enemies[edit]

• Boo
• Noknok
• King Boo (Wonder Effect)

Talking Flowers' quotes[edit]

• "Wheeeee! Hahahaha! I love this ride!" (said by a flower riding on the first row of spiraling invisible blocks)
• "Well? Were you scared?" (said by a flower at the end of the Wonder Flower area, after the Wonder Effect ends)

Gallery[edit]

• 

  The course's thumbnail

Names in other languages[edit]

Notes[edit]

• When playing this level while using the InvisibilityBadge, characters will become visible while standing in lights.
• "A Night at Boo's Opera", the song which plays during the level's Wonder Effect, is named after the 1935 American comedy filmA Night at the Opera and/orthe 1975 album of the same name by English glam rock bandQueen.

• Ghost Houses
• Super Mario Bros. Wonder levels

• Articles with unsourced foreign names