From the Super Mario Wiki, the Mario encyclopedia
The Studio Entrance is the third room of Paranormal Productions in Luigi's Mansion 3. It can be accessed from an open hallway from the Entrance Hall, or when the player eventually unlocks the door to the Backstage they can enter from there. On the right wall, there is a shelf with three invisible Gold Bars that the player can uncover via the Dark-Light Device. Directly below the shelf, there is a hole covered by a grate that the player can pull off using a Suction Shot. Gooigi can squeeze into the hole, which sends him on a ride until he slides out with several Coins and gold bars following him.
On the right side of the room, there is a front desk with a metal gate blockading the way to get behind it that only Gooigi can bypass. Behind the desk are several objects of monetary value. On the front of the desk, there is a loose lever-like object that the player can pull with their Poltergust G-00 that activates a wall decoration to raise, revealing a Gem behind it that drops down to behind the desk. On the left side of the room, there’s a rug. Blowing at the rug will reveal a section of the floor beneath it that raises up, revealing another hidden gem.
Using a boxing glove aquired from the Entrance Hall, the player can shoot the two audio boxes in the room by blowing exhaust, busting the audio boxes and sending several Bills flying out of them.
On the left side of the room, there is a television the player can turn on by flashing it with the Strobulb. It can teleport the player to a part of the Elevator Hall, where they can obtain a Key that is used to unlock the door to the Backstage.
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