Find all six gems in 6F — Castle MacFrights. 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
Unlock Gooigi and the Dark-Light Device before completing the floor. Clear the story route first if a door or room mechanism remains locked.
White gem — Coliseum Balcony
After King MacFrights, take the right stairs to the balcony. Vacuum the armour and popcorn on the route back to the entrance to uncover the white gem.
Red gem — Hall of Armor
Use Dark-Light in the empty upper-right armour alcove. Pull the restored suit down with Suction Shot and collect its red gem.
Blue gem — Cellar
Open the rightmost large barrel with Suction Shot. Enter it, turn into the side opening and climb the hidden ladder to the blue gem.
Green gem — Royal Coffers
Remove the tapestry in the corridor before the Coliseum and restore the missing door with Dark-Light. Enter the treasury and collect the green gem among the gold.
Purple gem — Armory
Pull the suspicious central patch of rear-wall bricks with Suction Shot. Open the chest in the secret room behind it.
Yellow gem — Cage-Lift Room
At the lower level, turn the wall propeller to lower the gem cage. Send Gooigi through its bars to collect 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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