From the Super Mario Wiki
The Master Bedroom is noticeable in that it is one of only two rooms with a ceiling fan, the other being the Billiards Room. Also in the room are Lydia's vanity, a cabinet, a nightstand, a bed, and a plant Luigi can water for a Green Jewel. From the window, one can see the Toad on the Balcony.
Ghosts in the Master Bedroom
Ghosts in The Master Bedroom during the blackout
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