Floor 15: Master Suite

Lounge: Collect Bills under the sofa and near King Boo statues. Suck pillows for Bills. Use Luigi and Gooigi on separate elevated tables to open a compartment containing the Green Gem. Send Gooigi through the green pipe to collect Coins and Bills, then find the Purple Gem. Use Dark Light on an invisible plant bot for Gold. Find Gold and Cash near a tree with Rats. Defeat a Gold Spider. Send Gooigi through a pipe in the top-right corner. Inside, defeat Gold Spiders for Gold, suck up a Gold Bar, and find a G-Bag for Bills. Suck a chain on the left and jump off the ledge to reveal double doors.

Hallway: Suck dust for Bills under drawers. Reveal invisible drawers for Gold. Burst a King Boo trash can for Coins. Solve a statue puzzle in front of a King Boo portrait: align its shadow with King Boo's, then Luigi's, to get the Clear Gem and Gold. Collect Bills from a sofa pillow. Defeat a Trapper using Luigi and Gooigi by sucking its tongues simultaneously.

Library: Burst dust to reveal laser traps. Navigate the first set of lasers by following the wave motion. Collect a Gold Bar and Pearl in the northwestern corner. Avoid the second set of lasers by timing your run. Head down spiral stairs. Defeat two Gold Spiders. Burst a trash can for Coins. Find a secret room by peeking through a hole. Navigate lasers in a circle to reach an electrical box and pull it to disable all lasers. Burst a golden globe for Coins. Tug a glowing purple book on the eastern shelf to reveal a secret.