Find all six gems in 1F — Grand Lobby. The colours are white, red, blue, green, purple and yellow. Gem collection is separate from the ending money rank; completing all seventeen floor sets unlocks Suction Shot Type-C.
Required tools and return visits
The white gem needs Dark-Light; the blue and yellow gems need Gooigi. Finish these after the laboratory tutorial.
White gem — West Lobby — hidden sofa
Aim the Dark-Light at the empty space beneath the west-side window. Restore the sofa and defeat the crystal ghost that emerges.
Red gem — East Lobby — desk emblem
Use Suction Shot on the circular hotel emblem on the desk right of the main stairs. Pull it to open the nearby picture and reveal the red gem.
Blue gem — Upper West Lobby — carpet grate
Blow the long red carpet backward to expose its grate. Send Gooigi down, move him behind the wall-mounted gem and use Burst to knock it onto the desk below.
Green gem — East Lobby — plant pot
Pull the pot beside the elevator with Suction Shot and smash it. Pick up the green gem from the broken plant.
Purple gem — Reception desk
Burst over the reception counter. Flash the green switch behind it to drop the purple gem onto the rear desk.
Yellow gem — Lobby chandelier
Stand Luigi and Gooigi on the two floor pads on opposite sides of the chandelier. Keep one vacuum running while switching characters, then spin the chandelier with both vacuums until the yellow gem falls.
Six-gem check
Open the floor collection screen and check all six colour slots. A missing colour identifies the exact entry to revisit above. Gem ghosts must be fully captured before their gem is awarded.
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