Exploring the spectral corridors of Luigi's Mansion 3 brings players face-to-face with numerous hidden secrets, including the elusive collectible gems scattered across each floor. Floor 6, known as Castle MacFrights, transports our green-hatted hero into a whimsical medieval theater filled with armor suits, castle walls, and tricky puzzles. Tracking down all six hidden jewels on this floor requires a mix of keen environmental observation and the clever application of Luigi's standard ghost-hunting tools.
Uncovering the Castle Entrance Gems
The first hidden jewel can be located shortly after entering the main castle grounds. Near the grand entrance gates, you will spot a conspicuous suit of armor standing guard against the wall. By using the Suction Shot to grab and pull the armor's chest plate, you can shatter the display and claim the red gem hidden inside. This straightforward puzzle introduces players to the physical destruction required to reveal many of the floor's deeper secrets.
Another well-hidden treasure awaits in the nearby hallway where a large tapestry hangs prominently on the stone walls. Players need to use the Poltergust G-00 to blow a steady stream of air against the fabric, causing it to roll up tightly. Revealing the space behind the tapestry exposes a secret alcove containing the beautiful green gem. These early discoveries demonstrate that looking beyond the obvious scenery is crucial for total completion.
Navigating the Colosseum Traps and Secrets
Moving deeper into the medieval stadium zone reveals challenges that require a combination of physics and timing. In the armor storage room, careful exploration shows a structural weakness near the back wall hidden behind some old wooden barrels. Breaking through these obstacles reveals a hidden vent that can only be traversed by deploying Gooigi into the pipe system. Your gooey doppelganger will emerge on a high ledge to collect the blue gem resting safely out of Luigi's normal reach.
Further along the path, you will encounter the dangerous cage trap room where teamwork between Luigi and Gooigi is absolutely essential. While one character stands on the pressure plate to keep the cages lowered, the other must navigate the spikes to find the yellow gem. Taking your time here ensures that you avoid unnecessary damage while completing the puzzle safely. It is highly recommended to study the room layout before making a move toward the prize.
Mastering the Final Stage Treasures
The remaining collectibles on Floor 6 are tied directly to the theatrical elements of the castle boss arena. After defeating King MacFrights, players can explore the royal balcony areas that were previously inaccessible during the main battle. Heading to the upper left seating section reveals a broken stone wall that leads to a hidden outdoor parapet. Following this narrow ledge allows Luigi to find the purple gem shimmering under the torchlight.
The final clear gem requires a precise use of the Dark-Light device on an empty torch stand located near the main arena exit gates. Flashing the spectral light onto the missing object causes the structural illusion to solidify completely. Once the torch returns to reality, a ghostly chest will materialize nearby, offering the last valuable treasure of Floor 6. Completing this collection rewards completionists with total mastery over the medieval floor's unique environment.