After the orchestral atmosphere of floor 4 and the fight against Amadeus, it's time for the Castle MacFruights, floor 6 of Luigi's Mansion 3. Go through the first door, then pass the gate that blocks you with Gooigi. He can then pull the rope opening the way to the real Luigi.
Walk past the entrance of the castle and step forward to the stage to see that a strange villain awaits you in the arena. To join him you will have to pass a few small trials: without further delay, go through the left door and clean the basic ghosts.
Go down to the next door, which will first require you to cross the spikes thanks to Gooigi who will, once again, pull a rope to lower the spikes and open the way for its twin.
To find the key, throw a suction cup on the central barrel and remove the lid to grab the key and move on to the next room.
Nothing complicated for this new puzzle since it uses the same principle: make Gooigi pull the rope, go back to Luigi who will interact with the ball at the bottom right to release a trapdoor. Once at the bottom, flash the white barrel that will produce a small flame, take the torch next to it, then burn the large canvas that prevents you from passing. Go to the end of the room, then climb the small ladder to reach Gooigi.
This new multi-level room will require you to operate an elevator with the vacuum cleaner. First, raise it to your level by sucking the propeller just to the right of the elevator. Pass one of the two Luigi into the cage, then blow on the propeller to lower the cage. Once at the bottom, repeat the manoeuvre but with the lower propeller to lower the one that remained at the top. Now that the duo is together, play a Dark-Light Device on the right wall to reveal a new room.
Here, a new wall of arrows prevents you from continuing your journey: get Gooigi, go to the other side of the flight of arrows and then suck the wire stuck just above: now that you have the two ropes, pull on one, then on the other, to make the scaffolding fall. Cross the small stream and the required key in the previous room awaits you in a chest. When you come back in this previous room, a bunch of mini red ghosts await you to fight it.
Be careful, in this new room you will have to be rather reactive since a trap will be triggered as soon as you have activated the last rope. First, open the cage with the chain at the end of the room, with Gooigi so that Luigi can go in the water and get the key. Then, ghosts will begin splashing Gooigi which will close the gate, while the walls filled with spikes will start to close on Luigi.
Place Luigi well in the center of the room, then take Gooigi and cross the grid to fight the ghosts that have locked you up. Once this is done, pull the chain near the door again to open the gate once and for all. Go through the door to reach the new trial.
This room full of spades will require a bit of judgment, but don't worry, nothing complicated: one of the two Luigi will pull the rope just below the door, freeing a propeller that will move the two deck halves. To connect all this, suck in the propeller until the two deck parts are the same as in the second image below. All you have to do is blow once and then you can cross the room without any problem.
Start by pulling on the first reel that will drop apples into the cart. Then take Gooigi to aspirate the cart and move it forward to block the first half of the arrow throwers. Keep Gooigi, go right in front and make the trolley appear with the Dark-Light Device where 4 wheels are visible. Same operation: pull the cart to block the last arrow throwers, take Luigi back, and go to the last room for the boss fight.
Floor 6: Castle Macfrights Boss, King Macfrights
This new ghost boss is not really tough, but you have to know how to disarm him. Stay in constant motion and wait until he charges you with his horse. King MacFrights will briefly let his head appear, this is the moment! Flash him then throw a suction cup in the center of his armor, then pull him to cause damage.
Repeat the operation 3 times, after which the ghost king will come in melee combat. Wait until he spins with his circular attack. Flash, vacuum and start again. You should succeed in defeating King Macfrights in 2 of those cycles.
