Find all six gems in 4F — The Great Stage. 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 green gem is inaccessible until the Super Suction upgrade during the 12F story. The other five can be collected earlier.
White gem — Women’s Restroom
Check the mirror for a missing tap. Restore it with Dark-Light above the right sink, then defeat the crystal ghost.
Red gem — Dressing Room
After the piano boss, enter the room left of the stage. Restore the missing piano parts with Dark-Light and interact with the piano to release the red gem.
Blue gem — Concession Stand
Send Gooigi behind the barrier in the men’s restroom and pull the flush mechanism. Use the newly activated Boo passage to reach the concession stand. Blow across the bottle tops from left to right to play the tune and open the safe.
Green gem — Auditorium — Super Suction return
Return after obtaining Super Suction during the 12F story. Burst on the square stage hatch to expose its socket. Clear the rear stage wall and ghost orchestra with Super Suction. Use the revealed television to reach the upper balcony and vacuum the popcorn bag containing the gem.
Purple gem — Elevator Hall — brass instrument
Have one character blow into the brass instrument while the other vacuums its opening. Keep the first action held while switching to collect the purple gem.
Yellow gem — Elevator Hall — popcorn machine
Flash the popcorn-machine sensor repeatedly. Continue until the machine bursts and drops the yellow gem.
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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