Exploring the massive Last Resort hotel in Luigi's Mansion 3 offers players plenty of secrets to uncover alongside the main ghostly campaign. The second floor, known as the Mezzanine, contains six hidden gems that require clever use of Luigi's Poltergust G-00 abilities. Finding every single collectible on this floor will test your observation skills and reward your thorough environmental interaction.

Locating the Restaurant and Kitchen Gems

The first collectible can be found inside the dressing room area adjacent to the main ballroom by using the vacuum on a hanging coat. Doing this drops the red gem directly onto the floor for Luigi to easily collect. Another jewel is hidden inside the kitchen freezer, which requires opening the heavy door with a suction shot. Once inside the cold room, you must use the vacuum to grab the frozen block and melt it on the stove to reveal the green gem.

The third floor jewel requires navigating to the main restaurant area where a large round table sits surrounded by chairs. Players need to use the Suction Shot on a specific sign on the wall to reveal a hidden compartment containing the clear gem. This area rewards players who take their time to inspect every corner of the dining environment carefully.

Discovering the Hallway and Restroom Jewels

Moving out into the grand hallway, you can spot a hidden mechanism near the large chandelier hanging from the ceiling. By using both Luigi and Gooigi to rotate the nearby floor switches, the chandelier will lower and release the yellow gem. This puzzle highlights the importance of using Luigi's gooey clone to interact with the hotel machinery.

The restroom area contains another hidden secret that many players accidentally overlook during their first walkthrough. Enter the rightmost restroom and use the Suction Shot to rip the grating off the wall to reveal a hidden pipe. Sending Gooigi through this drainage system allows him to reach a secret upper valve that dispenses the blue gem.

Securing the Final Mezzanine Collectible

The last treasure on this floor is located near the grand ballroom entrance where a large security door stands firmly shut. Players must use the dark-light device on the empty space to the left of the doorway to reveal a hidden cabinet. Opening this newly appeared container will yield the final purple gem for your growing collection.

Collecting all six treasures on the second floor unlocks a special achievement and brings you closer to full completion. Mastering the unique abilities of the Poltergust G-00 is the key to conquering these clever environmental puzzles. Check back often for more detailed guides to help you clear out every haunted floor in the game.