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The Workshop is a room of the Old Clockworks in Luigi's Mansion: Dark Moon.
Description[]
It can be accessed by taking the left door inside of the Clock Tower Gate or by taking the right door on the first floor of the Warehouse. It's a small room covered in sand. It has a table and shelf with various tools.
Dark Moon Quest[]
In "A Timely Entrance," Luigi has to go through the Workshop in order to reach the Clock Tower Gate. He'll approach two invisible Greenies hammering a giant Robomb. These ghosts can be ignored to progress forward, however, if Luigi flashes the Robomb using the Strobulb, it will explode and stun the two Greenies, thereby locking the doors. Luigi can immediately vacuum the Greenies once they are stunned. If he tugs the right sided chain, a Gold Greenie will appear. On the top right shelf next to the Clock Tower Gate's door, he can find a stack of bills.
From "Underground Expedition" onwards, the Workshop serves no relevant purpose, except for the mission "Play Catch," where the Polterpup will be hidden in the machine. In "Outlandish Interruption," this may be one of the rooms infested with ghosts.