Mudroom Exterior (F1)

If players look throught the window in the Mudroom, they'll see Polterpup playing with the gemstone before getting it stuck on top of the tree. Gamers can then go outside by flashing the Poltergust 5000's light on the switch in the Mudroom, which will unlock the door, allowing them to go outside and suck up the gemstone.

Yard (F1)

To get the second gemstone, players have to leave the mansion through front door in order to get to the yard. Then, they must flash Luigi's light on the second purple flower located on the left side of stairs leading up to the house.

Parlor (F2)

While in the Parlor, gamers have to look up using X and then shine Luigi's light on the clock's green switch.

Studio (F1)

There is a gemstone on the window of the Studio, which gamers can spot if they look through the camera facing the mirror on the wall - reach it using the Poltergust 5000.

Entrance (F1)

Players must interact with the knight armour on the right to get its helmet to fall off. Then, they can grab it using the vacuum and throw it against the helmet painting up on the wall.

Dining Room (F2)

To get the gemstone in the Dining Room, players have to shine the Poltergust 5000's light on the ceiling, above the right-hand side of the dining table.

Kitchen (F1)

If gamers open the fridge in the Kitchen, they'll find a frozen gemstone; they can thaw it by placing it next to the stove on the left.

Foyer (F1)

Even though this gemstone is located in the Foyer, gamers can only reach it by going out of their way. They must uncover the secret entrance that leads to the area behind the aquarium. To get there, they first go to the Patio, which is located between the Kitchen and the Common Hall. To get behind the aquarium in Luigi's Mansion 2, gamers have to shine dark light on the wall on the left side of the patio - this will reveal a door that leads under the stairs of the Foyer. Inside this secret pocket, there's another door on the left, which gives them access to the area of the Foyer that's blocked by the aquarium.

Patio (F1)

There are two fish statues in the fountain in the Patio: one in the center and another one on the right side. Gamers can shine dark light on the left side of the fountain to uncover a hidden statue as well as a gemstone.

Library (F1)

There is a hidden globe on the southwestern corner of the library, and it can only be revealed if players shine dark light near this area. Next, they have to vacuum the globe with the Poltergust 5000 to collect the tenth gem.

Study (F2)

If gamers shine dark light on the painting in the Study, they'll recover the next Gloomy Manor gemstone.

Rafters (F3)

Once gamers get access to the attic in Gloomy Manor, they will find the gemstone on top of a vanity in the southeastern area of the Rafters room.

Bedroom (F2)

There is a divider in the bedroom, which can only be accessed if there is no spiderweb between it and the wall. To get rid of the spiderweb, enter mission A-5, activate the furnace, and use the Poltergust 5000 to make the ceiling fan spin around cause the spiderweb to catch fire.