From the Super Mario Wiki
The Butler's Room is a room found in Area Two of Luigi's Mansion.
After Luigi lights Shivers' candles, Luigi follows the ghost back to his room. When Shivers burns himself using a candle, Luigi sucks him up with his Poltergust 3000. This causes the Key to the Conservatory to appear.
The Butler's Room has many items within its confines. A large tool cabinet is in the northwest corner, and continuing south along the wall, there is an ironing board and a small bucket. In the exact center of the room is a table with three stools. A sewing machine and an ironing board are north and south of the table, respectively. Along the east wall is a bucket of water, a stack of toilet paper, and a mouse hole. One of these objects holds a jewel. The mouse hole leads to the Hidden Room when Luigi inspects it with the Game Boy Horror.
Ghosts in the Butler's Room
Ghosts in the Butler's Room in the PAL Hidden Mansion
Ghosts in the Butler's Room during the blackout
Names in other languages