Studio 4: Micro Set

The Mirco Set is a room in Luigi's Mansion 3. It is found on the eighth floor of The Last Resort, Paranormal Productions.

The green gem can be found inside a bottle next to the cardboard box which Gooigi can enter.

There a giant coins where Luigi can use Suction Shot and slam it to reveal a bunch of coins. Inside the box are multiple Gold Spiders and Morty's megaphone attached to a web. When Gooigi appears on camera, he must use the suction shot to open the box, where the giant spider will come out. Gooigi must use the torch to burn the giant spider and the web where the megaphone is trapped. Luigi can now grab the megaphone and return to Morty.

Trivia

 * The Micro Set is a reference to the 1957 film , specifically the scene where Scott battles a spider.