Luigi's Mansion 3

Luigi's Mansion 3 is an upcoming game in the Luigi's Mansion series for the Nintendo Switch, set to release on October 31, 2019. Unlike previous games in the series, the game takes place in a haunted hotel rather than an actual mansion. It is the third Luigi's Mansion game in the main series, being developed by Next Level Games, and the fifth game in the series overall.

Story
Luigi, Mario, Princess Peach, and various Toads are invited to a hotel called The Last Resort for a vacation party, which they travel to via a charter bus driven by Toad. Soon after Luigi and the gang arrive inside the first/second floor Grand Lobby during broad daylight and all check in at the front desk with the bellhop/receptionist ghost called Steward, they are then introduced and later escorted by the owner of the hotel, a mysterious purple ghost woman called Hellen Gravely, who is the one responsible for releasing King Boo, to take the elevator on the first floor within the Grand Lobby upstairs and the gang all stay on the RIP Suites fifth floor. Princess Peach is seen heading towards her respective hotel room (501), Mario to his (502), and finally Luigi departures into his own (503). Inside his hotel room (503), Luigi reads a novel whilst laying on a bed alongside Polterpup and quickly falls asleep, later having woken up on a rainy night accompanied with Princess Peach screaming now inside a haunted hotel with everyone but Luigi gone missing, having been trapped in paintings by Luigi's nemesis, King Boo. Luigi gets out of bed with simply a flashlight in hand and exits his RIP Suites fifth floor hotel room (503) and sees mysterious purple energy lurking through the hallway and walks towards the floor's elevator only to later find Hellen Gravely coming down from upstairs and walks out of the opened up elevator and shows Luigi the portraits where the remainder of the gang is trapped inside of with King Boo waiting right behind her in the hallway on the respective floor, who later chases Luigi through the hallway and can be seen attempting to trap Luigi inside a painting at the dead end of the hallway, though Luigi manages to escape by jumping into a laundry chute at the end of the hallway and falls all the way into a laundry hamper in Basement 1. Luigi is woken up by Polterpup and manages to find the Poltergust G-00 inside a red car, as well as the Dark-Light Device inside a vault on the Mezzanine second floor. After saving Professor Elvin Gadd from being trapped inside a painting on the Mezzanine second floor using the Dark-Light Device, Luigi has to save the rest of the gang, by navigating over seventeen stories (two below ground, fifteen above ground, and a roof) of the hotel in no particular order by collecting the elevator buttons from character-like boss ghosts at the end of every different themed floor. He also needs to defeat the ghosts with the help of Professor Elvin Gadd while inside Basement 1, using a new Poltergust called the Poltergust G-00 and a green doppelgänger called Gooigi. Once Luigi rescues Mario, Princess Peach, and the Toads from being trapped inside their respective paintings, they'll be waiting for Luigi at a place called the Safe Camp.

Gameplay
Luigi's Mansion 3 plays much like the two previous entries in the series, Luigi's Mansion and Luigi's Mansion: Dark Moon, allowing the player to re-explore already completed rooms and lacks missions respectively. The E3 2019 demo had a fifteen minute time limit. The Poltergust G-00 retains the basic qualities of the two previous vacuums, as well as the Strobulb item and the Dark-Light Device, though adds a targeting mechanism when blowing out items or a plunger. It also introduces new abilities, such as slamming ghosts on the ground or into each other, firing a grabable plunger with the Suction Shot, and creating a shockwave or being lifted up with a Burst. Luigi has a new device known as the Virtual Boo (VB), a parody of the Virtual Boy, which serves the same function as the Game Boy Horror and Dual Scream did from the two previous games. The money collected with the Poltergust G-00 can be used to buy Gold Bones (1,000 G), Boo Finder cartridges (1,000 G), Gem Finder cartridges (1,000 G), and also to buy hints from the Virtual Boo's E. Gadd Hotline while in the Lab inside Basement 1 to find in-game floor themed collectible gemstones and other various puzzles, which when brought will activate the HD Rumble in the Joy-Cons when getting close to a gemstone or Boo while in certain rooms on floors when using Gooigi, which can also be felt when using the Poltergust G-00. Professor E. Gadd will sometimes suggest Luigi to come to his Lab in Basement 1 to buy hints from him to solve the floor's puzzles and such whenever the player is struggling, though hints can be turned off in the Guide/Settings menu. There are six floor themed gemstones and six Boos on each floor. The game automatically saves progress whenever entering a room or elevator. There are in-game achievements for certain objectives. Story mode (co-op), ScareScraper (co-op), and ScreamPark can't be played in co-op multiplayer on the Nintendo Switch Lite without detached official Nintendo Switch Joy-Cons. There's a brightness slider to control the hue of a given area from darker to lighter in the game's Settings. Story mode can be beaten in roughly ten hours.

Gooigi, introduced in the Nintendo 3DS remake of the first Luigi's Mansion, reappears and is stored in the Poltergust G-00, hence Gooigi. Gooigi has up to 25 HP, while Luigi has over 99 HP, and can be called upon to pass obstacles Luigi cannot, such as spikes and bars. However, it is weak to fire and water, and will lose all its health immediately if it comes into contact with them, causing an immediate Game Over. The Game Over screen showcases King Boo having Luigi, Mario, Professor E. Gadd, Princess Peach, and the two Toads trapped inside paintings and ends saying, "Good Night!" Luigi and Gooigi cannot be controlled at the same time in single-player mode, but Gooigi can be controlled by a second player with the second Joy-Con (R) controller for co-op multiplayer. If Luigi attempts to enter a door with Gooigi out, Gooigi will automatically retract into the Poltergust G-00.

ScareScraper
Like its direct predecessor, ScareScraper also returns, allowing for up to eight-player co-op multiplayer (via four Luigis and four Gooigis)   to clear either 5, 10, or a random amount of floors with a five minute time limit for each floor, except the roof, which has a time limit of roughly ten minutes. The mode also features procedurally generated floors, with different challenges on each floor such as Capture the Ghosts!, Find the Toads!, and Collect the Money!. It acts very similar to its prequel appearance, though adds new abilities and functions such as the super suction, super strobe, a red siren trapdoor detector helmet, voice chat, and the Blackout. Boolossus awaits the Luigis and Gooigis at the top of the ScareScraper hotel roof upon completing all the set floors. ScareScraper is more challenging than story mode, however.

ScreamPark
A multiplayer party mode where two teams called Team Luigi and Team Gooigi consisting of Luigis and Gooigis respectively, set to compete against each other on different levels with a two minute time limit where they have to capture the most Goobers (Ghost Hunt), collect the most coins while riding floaties in an indoor swimming pool (Coin Float), and manage to avoid hitting a wooden castle pellet trap and smash the most bullseye targets on the ends of a rotating wooden pirate wheel to win (Cannon Barrage).

Controls

 * + : Burst
 * Blow
 * Suck
 * Skip cutscene
 * Pause menu
 * ///: Toggle map (up)/call "Mario!" (left, down, right)
 * + /: Action/Dark-Light
 * /: Strobulb/Slam
 * Inflate a floatie
 * Change movement
 * /: Suction Shot
 * Move
 * Turn
 * (press ×1 down): Summon/select Gooigi or Luigi
 * (press ×2 down): Store Gooigi
 * Tilt : Aim up/down

Playable characters

 * Luigi
 * Gooigi

Supporting characters

 * Mario
 * Polterpup
 * Princess Peach
 * Professor Elvin Gadd
 * Toad Assistants

Normal Ghosts

 * Goobers (100 HP), blue ghosts that look similar to Hiders and Greenies, alongside with a smaller variant called Mini Goobers (0 HP), whom can dress wearing various attires such as hotel staff members, maids, cowboy hats, spears with a venus flytrap attached, firefighters and a green Ghostzilla on the Paranormal Productions eighth floor, ballerinas, and wear hoodies while on The Dance Hall fourteenth floor
 * Hammers (200 HP), red ghosts with square heads that look similar to Slammers and act like Whomps, alongside with a smaller variant called Mini Hammers (0 HP)
 * Oozers (100 HP), skinny yellow ghosts that look and act similar to Hiders
 * Unnamed gold and silver variants of the Goobers (125-250 HP) that act similar to Gold Greenies and Speedy Spirits, who are able to throw tomatoes
 * Polterkitties (100 HP), purple ghost cats that turn into horrifying monsters when Luigi approaches, one of which Hellen Gravely owns
 * Slinkers (120 HP), purple ghosts that look similar to Sneakers and Ceiling Surprises, and act similar to Creepers that can suck the player into a floor portal
 * Spirit Balls (0 HP)
 * Trappers, orange ghosts with two blue tongues
 * Bins

Boss Ghosts

 * Boolossus, who is fought on the ScareScraper hotel's roof
 * Steward (250 HP), a blue bellhop/receptionist ghost that's seen in the Grand Lobby first floor, and he's fought while in the parking garage in Basement 1, where he throws suitcases and luggages at Luigi, and gives Luigi the first and fifth elevator buttons
 * Chambrea (200 HP), a purple maid/housekeeper ghost seen in the intro on the Grand Lobby second floor heading towards the Grand Lobby second floor elevator and is fought in the RIP Suites fifth floor in hotel rooms (508), (507), (506), and in hotel room (505), and uses her hand duster to make Luigi sneeze and she has Professor E. Gadd's briefcase, for the third floor elevator button<ref name=charName/
 * Kruller (250 HP), a security guard ghost that resembles Mr. Luggs and battles with Gooigi using a water gun from the lost and found on the Hotel Shops third floor in a room besides his security office for the second floor elevator button
 * Chef Soulfflé (350 HP), a chef ghost that's fought in the Mezzanine second floor kitchen and uses his frying pan for defense for the fourth floor elevator button, which Luigi has to chase a mouse for through a couple of rooms until it's finally snatched inside one of the floor's bathrooms full of food and mice
 * Amadeus Wolfgeist (450 HP), a composer/musician ghost fought in The Great Stage fourth floor, who hides inside a piano for the sixth elevator button
 * King MacFrights (200 HP), a Scottish medieval-style king ghost on the Castle MacFrights sixth floor for the seventh elevator button
 * Dr. Potter (300 HP), a botanist ghost on the Garden Suites seventh floor for the eighth elevator button
 * Morty (0 HP), a French film director, on the Paranormal Productions eighth floor for the ninth elevator button
 * Ug (400 HP), a caveman ghost who controls an animate T-Rex dinosaur skeleton in a dinosaur museum themed area on the Unnatural History Museum ninth floor for the Basement 2 elevator button
 * Clem (350 HP), a mechanic ghost inside Basement 2 for the tenth elevator button
 * Serpci (300 HP), a pharaoh ghost with black hair who wears Egyptian attire on the Tomb Suites tenth floor for the eleventh elevator button
 * Nikki, Lindsey & Ginny (100 HP each), a trio of magician ghosts who are triplets similar to the Star Shuffle game from Mario Party 6, on the Twisted Suites eleventh floor for the twelfth elevator button
 * Captain Fishook (300 HP), a shark pirate ghost fought on The Spectral Catch twelfth floor for the thirteenth elevator button under his eye patch
 * Johnny Deepend (60 HP), swimmer ghost battling on top of an indoor pool who throws volleyballs at Luigi on the Fitness Center thirteenth floor for the fourteenth elevator button
 * DJ Phantasmagloria (450 HP), a female disco disk jockey diva ghost who DJ's and throws vinyl records at Luigi on The Dance Hall fourteenth floor for the fifteenth elevator button
 * Hellen Gravely (600 HP), a female purple ghost who is the owner of The Last Resort that wears a long dress and sunglasses seen on the Grand Lobby first floor, RIP Suites fifth floor, and Master Suite fifteenth floor
 * King Boo (0 HP), seen on the RIP Suites fifth floor hallway and is fought on the roof above the Master Suite fifteenth floor

Other

 * Bats
 * Boos (20 HP)
 * Crows
 * Mice
 * Mummies
 * Snakes
 * Spiders
 * Super Stars
 * Trapdoors

Items and treasures

 * Bills
 * Coins
 * Floating Mines
 * Gemstones
 * Gold Bars
 * Hearts
 * Keys
 * Pearls
 * Spiked Balls
 * Treasure chests

Known information

 * The reveal trailer shows that the hotel is set in the mountains with a river, fog, trees, bats, and the full moon in the background. In the follow up trailer, on the sixth floor of the hotel's exterior, there is a yellow cheese on a plate with a silver cloche above it representing the second floor (Mezzanine) and is partially medieval themed for the sixth floor (Castle MacFrights), a greenhouse dome-like structure on the seventh floor (Garden Suites), a sand themed tenth floor (Tomb Suites), a pirate-like hat on the twelfth floor (The Spectral Catch), a metal dome-like structure on the thirteenth floor (Fitness Center), a pink and blue neon lighted exterior on the fourteenth floor (The Dance Hall), and a King Boo structure with a lighted purple gem on top of its head on the fifteenth floor (Master Suite).
 * King Boo returns and is seen chasing Luigi and uses his crown to place Spirit Balls on the RIP Suites fifth floor on Luigi's hotel room (503).
 * Princess Peach makes her first physical appearance in the Luigi's Mansion series.
 * The game is 6.3 GB (6,300 MB) in file size.

Floors

 * Basement 2
 * A Boilerworks area.
 * Basement 1:
 * A underground parking garage similar to the one in Luigi's Mansion: Dark Moon, but with a red car rather than a purple one in Basement 1.
 * A Lab where Professor E. Gadd resides in Basement 1.
 * Grand Lobby:
 * The main lobby/foyer on the first floor of The Last Resort, with circular hanging pictures of Luigi, Mario, Toad, and Princess Peach from the ceiling, which during night, are all rectangular pictures hanging from the ceiling that have an "X" across them, which if hit with a jack-o-lantern, will release a pearl
 * In the back is a cubby section behind the front desk with over thirty five mail inboxes, which during nighttime has a safe that needs a Strobulb flash to open, and there's a clock behind the front desk on the left with a key infront of it.
 * Mezzanine:
 * A dining room with a lot of food, with some on the ground, found on the second floor.
 * A hallway called the Elevator Hall.
 * Hotel Shops:
 * An indoor shopping mall area with an escalator and many closed stores, including a barber shop, a clothing store, jewelry store, and a gift shop with a club, heart, diamond, and spade playing card suits alongside them respectably, along with a cafe in the upper center. This is on the third floor.
 * The Great Stage:
 * A theater entrance, with a Goob moving the rug underneath Luigi, and two restrooms on the fourth floor.
 * RIP Suites:
 * A fifth floor hallway with cleaning supplies and numbered hotel rooms (501-508).
 * Hotel rooms such as; Princess Peach's hotel room (501), Mario's hotel room (502), Luigi's hotel room with a bathroom (503), a regular hotel room (504), a hotel room with a walk in closet where Chambrea is captured (505), a hotel room with a mini golf course inside (506), a bland hotel room still under wall painting service (507), and E. Gadd's room with a balcony deck and briefcase inside where Chambrea resides (508).
 * Near the vending machine area, Luigi can head outside to walk on some portions with his back alongside The Last Resort's exterior wall amongst the chipped off ledges on the fifth floor and a treasure chest can be seen.
 * Castle MacFrights:
 * A medieval castle based floor featuring a dungeon and an indoor arena on the sixth floor.
 * Garden Suites:
 * An indoor nature area with plants overgrowing the rooms on the seventh floor.
 * Paranormal Productions:
 * A production studio with various movie sets and televisions that function as teleporters on the eighth floor.
 * Some rooms include; Horror Set (Studio 1), Castle Set (Studio 2), Fire Set (Studio 3), Micro Set (Studio 4), City Set (Studio 5), and the Backstage.
 * Unnatural History Museum:
 * A museum area with a T-Rex dinosaur skeleton, which attempts to snatch Toad's painting with its jaws, on the ninth floor.
 * Tomb Suites:
 * A desert floor with a pyramid, along with mummies and Boo themed booby traps on the tenth floor.
 * Twisted Suites:
 * A magic/carnival themed floor with three unnamed invisible sisters/triplets alluding three floating top hats on the eleventh floor.
 * The Spectral Catch:
 * A cave-like pirate-themed restaurant with a pirate ship and a ghost shark on the twelfth floor.
 * Fitness Center:
 * An indoor swimming pool area on the thirteenth floor.
 * The Dance Hall:
 * A disco club with neon lights and a dance floor on the fourteenth floor.
 * Master Suite
 * An indoor area where Hellen Gravely resides on the fifteenth floor, with King Boo on the roof.

Add-on content
Paid downloadable content (DLC) will come to Luigi's Mansion 3 in the future, adding new content to the ScareScraper and ScreamPark multiplayer modes, though the full version of game is required to use DLC, which is sold separately.

Nintendo website description
''Luigi’s dream vacation turns into a ghostly—and gooey— nightmare! Luigi embarks on a dream vacation with Mario and friends upon receiving an invitation to a luxurious hotel. However, his dream quickly becomes a nightmare when King Boo reveals everything had been a ploy to capture Mario and friends. With the assistance of Professor E. Gadd once again, the reluctant and cowardly hero Luigi traverses up and down treacherous floors of the now-ominous hotel on a quest to save them. Wield the upgraded Poltergust G-00 to slam and blow away the ghosts’ defenses, or summon Gooigi, an all-green doppelganger that can help Luigi overcome obstacles he can’t get past alone. Interchange between Luigi and Gooigi as one player, or grab a friend and control one each. For more frenetic multiplayer action, race the timer to clear various objectives on a series of floors in ScareScraper mode. ScareScraper mode can be played online* or locally with up to eight players on four Nintendo Switch systems (additional games required; sold separately).''

Pre-release and unused content
The game was originally going to be a Wii U title, though development started for Nintendo's next generation console in earnest following the completion of Next Level Games' Metroid Prime: Federation Force. The Slam and Burst moves were planned during the Wii U prototype. Prior to his debut appearance in the Nintendo 3DS remake of Luigi's Mansion, Gooigi was already planned for Luigi's Mansion 3 upon the Nintendo Switch's launch when the developers got the inspiration from the Joy-Con for multiplayer mode. While in development for the Nintendo Switch, Luigi's Mansion 3 was originally a tentative title prior to becoming the final name.

In an interview, producer Kensuke Tanabe mentioned that the developers had experimented with including a warp system where the player could turn on TV sets found in the rooms and warp between them to travel throughout the entire hotel, much like the Paranormal Productions eighth floor. However, as it was not possible to include a TV in every room, the idea of using this mechanic throughout the entire hotel was scrapped in favor of the elevator idea.

The Grand Lobby first floor originally had a bland different wall design above the front desk area.

The Mezzanine second floor dining room had different table clothes with no table lamps on top and there wasn't a lobster or ice cream inside a white ceramic pedestal dish in the back wall table.

The Hotel Shops third floor indoor shopping mall's gift shop had a different interior design compared to the final version, as well as no stacked chairs or a janitors cart infront of it either.

The Great Stage fourth floor theater hallway had no Boo design on the wall on top of the Mad Piano painting, but a later version does.

While Luigi is reading a novel on the bed in his RIP Suites fifth floor hotel room (503) and quickly falls asleep, he didn't drop the book exactly in-between his lower stomach center area, nor had, "ZZZZZZZZZZZZZ," coming out of him while snoring either. Mario's hotel room (502) was different looking, lacking fog, had the purple comfy chair closer to the table near the bed with two pizza boxes on top, there was another purple comfy chair to the right of the table closest to Mario's bed, Mario's two slippers are apart from each other, there were four pizza boxes on top of a mobile serving table, the chair in the back left was tipped over, Mario's suitcase with his signature M emblem on it wasn't opened up, the table nearest to Mario's mattress had food that was tipped over, and such.

The Castle MacFrights sixth floor had dark and light stones on the back wall in the inner area infront of the wooden floorboards between both the rock and wooden stairs.

The Garden Suites seventh floor originally had a room with a large watermelon with three smaller watermelons besides it, though just four smaller watermelons in the final version. The eighth floor elevator button on the Garden Suites seventh floor was originally to be collected by having Luigi water a plant that sprouts a beanstalk, which had to be climbed to reach the eighth floor elevator button on the tree's purple leaf, with the final version requiring Luigi and Gooigi to use the Poltergust G-00 to get to the top of the tree and suck on a venus flytrap's mouth open and have it fall all the way to the floor.

The Paranormal Productions eighth floor had the golden velvet rope barriers infront of a snow mountain prop near the elevator protruding out just slightly and had ceilings lights on the theater poster-like display hallway area. The Fire Set (Studio 3) room didn't have a Polterkitty, just a Hammer and Goobers.

The Dance Hall fourteenth floor originally had green/blue colored three way subwoofer loudspeakers.

The exterior of the ScareScraper hotel originally didn't have translucent windows.

Boos

 * Boosement
 * "Ho ho, I'm Boosement! Looks like you're still in the dark! Ho ho! Ho ho, I'm Boosement! Looks like you found me...or did you?"

Hellen Gravely

 * "Guests! Welcome to The Last Resort! My name is Hellen Gravely, and I am the owner of this hotel. I am absolutely delighted that you decided to accept my invitation. You all must be very tired. Come! Allow me to show you to your rooms. Oh, no need to worry about your luggage! Our exceptional staff will take care of it for you... Ha ha ha... You're our VIPs, after all! We've prepared a first-rate experience for you. All the trappings of luxury! Shall we get going? Mario, Luigi, and Peach's rooms are over here. We've prepared rooms for you Toads as well! I hope you enjoy your stay! I daresay you'll remember it for the rest of your lives! Ha ha ha..."
 * "Well well well! If it isn't my most esteemed VIP! I was just on my way to see you... Is your room living up to your expectations? Doesn't it SCREAM good taste? Oh, I can barely contain myself. You have no idea how much I wanted you to accept my invitation! "Why is that?" I'm sure you're wondering. Ha ha ha... You see... There is someone I truly adore! He's the inspiration for some of my greatest ideas... Like inviting you here! I'm such a huge fan of his! That's why it's so wonderful that I get to introduce him to... YOU! That's right, Luigi! I hope you're ready!"

Hotel Staff

 * "Is something the matter? I hope nothing is making your stay here less than perfect... Our entire staff is devoted to providing you with the ideal vacation experience! Heh heh heh..."
 * "It looks like you haven't checked in yet. Please make your way to the front desk. It's right over there..."
 * "Please make yourself comfortable... Perhaps you'd like to sample our selection of beverages?"
 * "My apologies for the inconvenience, but the elevator is temporarily out of service. We should have it in tip-top shape soon!"
 * "What do you think of the hotel? We take pride in the luxury and splendor it offers!"

King Boo

 * "Mwah ha ha! Surprise, Luigi! It's-a me, King Boo! That old coot had me locked up tight in his lab... But guess what? I GOT OUT! The hotel owner here was just dying to meet me, so she busted me out. Pretty lucky, huh? Anyway, I didn't think you'd actually show up here. I was ready though, just in case. In fact, my vengeance is nearly complete! What do I mean by "vengeance"? Glad you asked! I'm trapping you and everyone in your little vacation party...in frames! Awww, there there, Luigi. It'll all be over soon. It's time for a family reunion! BOO-YA! Mwah ha ha! Take THAT! Oh, and there's one more frame, of course. I saved it especially for you! Stay right there and put on your best terrified face, Luigi! This is game over!"
 * "You were all "SHWEEERRPP-SHLOOOOP-WHOOORPP-SHLEEEOOORG!""

Luigi

 * "Oh, yeah!"
 * "Wowie zowie!"
 * "Uh, bye."
 * "OK."
 * "Night, night."
 * "ZZZZZZZZZZZZZZZZZZZ"
 * "Hello?"
 * "Oh no!"
 * "Mario?"
 * "M-Mario?"

Mario

 * "Let's go!"
 * "Oh, here I go!"
 * "Yeah!"
 * "Bye, bye!"
 * "Night, night!"
 * "Hey bro!"
 * "Oh... Doggy."

Morty

 * "The tragedy. Oooooh ho ho ho! Is this my end? Is this what I, Morty, director of the finest films, am destined for? How could I lose it... I am a puny, worthless movie director... That's all... Even the sparkle from this beautiful button is now nothing but a dull hue... AHHHHH! My bright red megaphone! Where art thou?! I would give anything to be able to hold my dear, sweet megaphone again... YOU! Wait a second! Hold it right there! I didn't notice until now, but your face... You have some nice features! And your build... Not bad. Not bad at all! I see all the makings of a star! Ahhh. My creativity is shaking off all the dust and surging to life! Come, come! Let's start shooting! Where's my crew?! Places, everyone! Take your places! And...action! Excellent! Excellent! Keep it up! Excellent work, you two! My gut tells me this is going to be a masterpiece! Now is your chance to achieve stardom! Now this... Oooh THIS is art... Cut!"

Princess Peach

 * "This hotel is so big, Luigi! It's gorgeously decorated too! We're so lucky to have gotten an invitation to come here! Hee hee!"
 * "Ahhhhhhhhhhhhh!"

Professor E. Gadd

 * "Ah! If it isn't Luigi! You are precisely the last person I'd expect to find here. Hold that thought—now isn't the time to catch up. What matters is...you'll do nicely! Come on, Luigi. Get me out of here now! The hotel is filled to the brim with ghosts! Let's make a run for it! What was that? All of your friends have been captured?! And you can't just abandon them here, you say? You're the same as ever, I see. A bit of a handful... OK. I'm not thrilled about it, but I, Professor Elvin Gadd, have an idea! First things first, Luigi. We have to get to my car! Will you take me there? Hey. The new Poltergust G-00 you're wearing... You took that out of my car, right? We've got to get back to the underground garage. Let's go!"
 * "Luigi! I told you that the elevator is that way! Why even consider using the stairs when there is a perfectly good elevator?"
 * "Hey, Luigi! Look at that... It's money, and lots of it! Even with all the dangers here, I'm sure we agree that money is still important! The ghosts don't seem interested in grabbing it... What's the saying? "You can't take it with you"? Well, I definitely want it anyway! Keep your eyes peeled, and grab as much as you can! You know, while you're capturing ghosts and saving your friends. Multitasking!"
 * "Of all the... Someone has removed all the other elevator buttons! What's going on here? Hmm... A mystery for later, I suppose. Go ahead and give the B1 button a push. It didn't seem like any of your friends were trapped on 2F with me... They must have been taken to one of the floors higher up in the hotel. Which means... Yeah, we're going to need those elevator buttons."
 * "Ho ho! Those are definitely the elevator buttons! I never would've guessed a ghost had taken them! But...there are only two. Maybe there are other ghosts out there with the rest of the buttons? No matter. Let's go to my car. I've got something very interesting that I want to show you!"
 * "Heh Heh Heh! Welcome to my lab! This is another of my brilliant inventions—a portable laboratory! It's sturdy, safe, and air conditioned! I always knew I'd need this one day. Good thing I brought it along with me, right? Hmm? You want to know what I'm doing in this hotel? It's a bit of a long story, but in short... I was tricked. I got an invitation from someone claiming to own this hotel. They said they had a precious collection of ghosts, gathered from all over the world! No self-respecting ghost researcher would pass up on such an appealing offer, obviously! I accepted their invitation, but when I arrived... The invitation was only a ruse! They captured me and took my precious ghost collection! Uuugh! That includes all those ghosts you'd worked so hard to catch for me before! Even King Boo! Losing him really got under my skin! He's my favorite... What? They've released King Boo?! Ugh! That hotel owner! What has she done?! Luigi! You're our only hope! Against all odds, without any hesitation, and at any cost...get my ghost collection back! And speaking of ghost collections, why don't you give me all of the ghosts you've captured so far! All right! Keep on catching those ghosts. Oh, and be sure to come back to the lab! I'll set up the gallery so that you can view the ghosts that you've captured! Hm? What's with that look, Luigi? Am I forgetting something important? Oh. Oh! That's right! I forgot about saving your friends and family. Completely and totally forgot. Regardless! To find ghosts and your friends, you'll need to explore this hotel! To help you out, I'll give you one of my greatest inventions yet! I call it...the Virtual Boo! VB for short! It's a state-of-the-art virtual-reality device fitted with a fancy red screen! Really cutting-edge stuff! And red is all the rage, you know? Just wait until I finish the marketing materials on this! It'll fly off the shelves! Heh heh heh! You can use the VB to communicate with me at any time. Hey, maybe we can test out the communications system later... Press to look into the VB. It'll display your current objective for you too. It's quite useful! Oh, and I have one more thing to give you. The very first thing you need to do is install this elevator tracker inside the elevator for me, OK? As for what it is... I'll tell you later! Go on and get it installed! Head for the elevator! I'm counting on you, Luigi!"
 * "Hey, it looks like you're stumbled across a Boo already! That's a sign that indicates there's a Boo nearby! Let me explain in more detail. Where are those note cards... You see, Gooigi's body is made of a material I've dubbed "Goo." Goo reacts to the frequency emitted by Boos. So if there's a Boo hiding nearby...the Goo will vibrate to indicate this! The closer you get to a Boo's location, the stronger the vibration will be. You'll definitely be able to tell when you're really close! Did that all make sense, Luigi? A strong vibration means a Boo is nearby! OK! Get out there and catch a lot of Boos! I'll start thinking about the best way to organize them..."
 * "Luigi, Boos are good at playing hide-and-seek! Shine some Dark-Light on the area to try to uncover them!"
 * "Hey, Luigi! If you find yourself needing to return to the lab quickly, I've got the perfect solution for you! I've streamlined a transfer system just for you! All you have to do is access the VB and select Lab, and we'll be face-to-face in an instant. The system goes both ways too! When you're ready to get back to your adventures, the system will return you to the same place you left! And that's all! Keep the transfer system in mind while you're out there exploring!"
 * "Sorry, I don't have any new information for you. Keep exploring the hotel! Do you need anything else, Luigi?"
 * "So you were also invited to this hotel, Luigi? Was it a pleasant letter that made the place sound so amazing that you absolutely had to come? They also wrote to me about having a fantastic collection of ghosts I could get my hands on, so I came here as soon as I was able! Obviously it was all a ruse to trap me... Did you want to speak to me? Or would you like to check out the log?"
 * "Stop fooling around, Luigi! Go to my room and get my briefcase! If you get turned around, you can always check the map using the VB..."
 * "Don't waste your time searching every room and looking in every little nook and cranny, Luigi! Certain ghosts leave traces behind in areas they've passed through. Use Dark-Light with, and check the walls and doors for clues!"
 * "Heh heh heh! It seems that you've also acquired a new elevator button, along with my briefcase! Well done, Luigi. Come on back to the lab!"
 * "Luigi, what are you doing? Hurry up and come back to the lab!"
 * "Luigi, it looks like you're able to get to 3F now! But before you head there, bring my briefcase back to the lab! I need it!"
 * ''"Welcome back, Luigi! My briefcase, chop-chop! Heh heh heh! This is what I wanted! The time has come to use it in battle! The latest invention from the brilliant mind of Professor E. Gadd! I give you... Gooigi! The development process was a real challenge, to say the least. Fortunately, I had a little help from someone to test the prototype! Hm? How is this going to help? Now, now. Take it easy. Here, Luigi! I'm going to attach this to the Poltergust G-00. Turn around for me, would you? OK! It's all set up! Luigi, let's practice a bit. Follow me outside! Heh heh heh! I've caught you in my trap, Luigi! Oh, don't worry! I'm just kidding! But I am going to need you to stay locked up. Why, you ask? Because I want you to use Gooigi to try to escape from your cell! You can activate Gooigi with . To recall him to his tank, press twice. Ta-da! Behold! This is your very own personal assistant, Gooigi! Gooigi can slip through tight spaces, like grates or vents. His body is incredibly soft and malleable. It's really quite amazing! Go out! See for yourself! There you go! He moves in basically the same ways you do, so controlling him shouldn't take much getting used to. Oh, and that reminds me! Pressing  once Gooigi is active will let you switch between him and yourself. Remember that! Heh heh heh! Gooigi isn't even remotely waterproof, Luigi! If he gets wet at all, he'll melt and disappear! Be careful with him around anything wet. Heh heh heh! Well done, Luigi! I feel like I can let you run loose with Gooigi! All right! We're done with your training, at least for now. Let's go back to the lab. Nice work, Luigi! Very impressive, I must say! That reminds me of something I wanted to tell you. I've been running the sensors in the lab, and they've detected the presence of a mysterious building. In fact, the ominous-looking tower is very close to this very hotel! Luigi, I know you really want to find all of your missing friends, but if you want a break from that, you could head over to the tower! It's probably crawling with ghosts that you can catch. Go on and test your skills there! For science! I've made arrangements so that you can access the tower from the lab. Just select ScareScraper in Multiplayer. Have fun! Oh! Wait! I just remembered something else! You can check out ScreamPark if you're feeling a little bit lonely and want to have some fun. Up to eight people can play and compete with one another! Fun! Heh heh heh! ...Oh right, you can get to a new floor now! Head to the elevator and take it to 3F!"''
 * "Luigi! The elevator can take you directly to Lobby 2F! You might as well head that way and check it out, I say."
 * "Oh, Luigi! You're finally back, eh? You shouldn't keep an old man waiting, y'know. Professor E. Gadd's Shopping Network is now open for business right here in the lab! Ta-daaaa! I've stocked some rather useful items. They're all yours...for a modest fee! Heh heh heh!"
 * "By the way, Luigi, here's a fun bit of trivia for you: every time you go through a door, all of your progress up to that point is saved. Automatically! But it might not be if you move too quickly from door to door to door to door to...You get the idea. I'd say waiting...10 seconds should be enough! You know what they say: patience is a virtue! Keep up the good work!"
 * "Luigi, did you see that? That security guard had an elevator button! It looks like he went into the security office. Follow him! Go!"
 * "Press to fire the Suction Shot, and take away his shield!"
 * "Let's go, boy! What did we see during your last training? Press while sucking, what does it tell you? That would allow you to switch between Gooigi and you. If one of you was sucking something, you will continue to do it! So you could suck, even blow, all the duets at the same time!"
 * "Luigi, look! That must be the megaphone! Looks like it's trapped in some spiderwebs! Those must be hearty webs..."

Polterpup

 * "Woooof? (Comfortable with what you learned?)"
 * "Woof? (Time to rest?)"

Steward

 * "Welcome, guests, to The Last Resort! Are you ready to check in? [If "No" is chosen] Not a problem at all. Make yourself comfortable. Please come see me when you're ready."

Toads

 * "Yahoo! Whoops!"
 * "Hhhhrrrrgggg! Princess Peach definitely didn't forget to pack anything... Ah, Luigi! What's up? Ahhhhh! Oh no! My head's stuck! I can't get out!"

Creative director

 * Bryce Holliday

Voice actors

 * Charles Martinet
 * Sam Kelly

Producers

 * Kensuke Tanabe
 * Yoshihito Ikebata

References to other games

 * Donkey Kong: On the Garden Suites seventh floor, Dr. Potter waters a plant that sprouts and then blasts out pineapples that bounce down the stairway, which Luigi and Gooigi have to dodge to the best of their ability, much like how Mario had to dodge the barrels rolling down the steel beam platforms being thrown by Donkey Kong.
 * Mario Bros. (Game & Watch): The pizza boxes in the RIP Suites fifth floor in Mario's hotel room (502) and the Paranormal Productions eighth floor Micro Set (Studio 4) say, "Since 1983," referencing Luigi's debut appearance in this game.
 * Super Mario Bros.: Upon arriving at The Last Resort's Grand Lobby first floor, the lobby theme sounds similar to the overworld theme intro portion and again after roughly four minutes.
 * Super Mario 64: There are posters on the wall in The Great Stage fourth floor music theater area on the featuring various instruments with an angry expression, one of which being a painting of an angry piano. A small portion of Peach's Castle theme can be heard in the Grand Lobby first/second floor after roughly two minutes.
 * Luigi's Mansion: There is a indoor shopping mall area on the Hotel Shops third floor with stores themed after the four suits of a deck of cards consisting of a club, heart, diamond, and spade based on the four respective Area floor keys. Chauncey's boss theme plays when using the Suction Shot on a crate in ScareScraper. The three blue beta ghosts from the Nintendo Space World 2000 trailer are referenced in the Mezzanine second floor dining area. The tomato from the game's beta can be seen thrown by unnamed gold and silver variants of the Goober ghosts. Professor E. Gadd's voice is sampled and his mouth is synchronized to speak in his usual gibberish voice. A portion of The Lab theme can be heard inside of E. Gadd's lab inside Basement 1 after a few seconds.
 * Super Mario Sunshine: The Coins make a similar sound effect when collected like in this game. Mario is distracted by cake during the intro in the Grand Lobby first floor, later pizza in his RIP Suites fifth floor hotel room (502), much like when he was distracted and daydreaming about seafood while watching TV on the airplane in the intro. While Luigi is battling with King Boo on the roof above the Master Suite fifteenth floor, he has to throw Spiked Balls into King Boo's mouth and make his mouth catch on fire, much like when Luigi threw peppers at King Boo's mouth during the fifth episode of Sirena Beach called King Boo Down Below.
 * Mario Strikers Charged: In one of the hallways in the theater on the Paranormal Productions eighth floor, a framed poster of Mario performing his Mega Strike move can be seen and another framed poster showing a bunch of characters running together from an aerial view.
 * Mario Kart Wii: When Luigi wakes up by Princess Peach's scream, "Ahhhhhhhhhhhhh!" during a rainy night while sleeping inside his RIP Suites fifth floor hotel room (503), this is a reused voice clip when she gets hit by a Spiny Shell or falling into water.
 * Punch-Out!! (Wii): In one of the hallways in the theater on the Paranormal Productions eighth floor, a framed poster of Little Mac in his victory pose with Doc Louis and Sandman in the background can be seen. Using Suction Shot on the poster will cause one of Little Mac's green boxing gloves to come flying out. Two of Little Mac's gloves can also be seen lying on the floor within the Fitness Center thirteenth floor gym room, having been worn by a Hammer ghost.
 * Super Mario All-Stars Limited Edition: A gym room on the Fitness Center thirteenth floor has a parallel curved golden leaf design on the top wall above the horizontal wall mirror seen on Princess Peach's press letter, and the same parallel curved golden leaf design can also be seen if either Team Luigi or Team Gooigi wins during ScreamPark.
 * Luigi's Mansion: Dark Moon: Luigi has to find the Poltergust G-00 inside Professor E. Gadd's car inside Basement 1 at the beginning of the game, much like when Luigi had to find the Poltergust 5000 inside a car in the Garage. In one of the hallways in the theater on the Paranormal Productions eighth floor, a framed poster of Luigi pointing the Poltergust 5000 towards King Boo is seen. A painting in Basement 1, the Mezzanine second floor bathroom, the RIP Suites fifth floor hallway, The Spectral Catch twelfth floor pirate ship room, and some sections of certain floors in the ScareScraper shows the Gloomy Manor mansion. The same music is played when sucking a ghost with the Poltergust G-00. Polterpup returns, though lacks pupils, and serves as the tutorial guide for the first few floors. The unnamed sisters/triplets on the Twisted Suites eleventh floor share the same concept as The Three Sisters. The ScareScraper mode also returns. Once Luigi completes any floor, the same room clear theme plays.

References in other games

 * Super Smash Bros. Ultimate: Luigi uses the Poltergust G-00 as part of his moveset and Final Smash.
 * Mario Kart Tour: King Boo has an alternate form using his Luigi's Mansion 3 design.

Official sites

 * Japanese website
 * American website
 * American detail website
 * European detail website
 * Australian detail website

Videos

 * Luigi's Mansion 3 (Working Title) - Announcement Trailer - Nintendo Switch
 * Luigi’s Mansion 3 - Nintendo Switch Trailer - Nintendo E3 2019
 * Luigi’s Mansion 3 Gameplay Pt. 1 - Nintendo Treehouse: Live - E3 2019
 * Luigi’s Mansion 3 Gameplay Pt. 2 - Nintendo Treehouse: Live - E3 2019
 * Luigi’s Mansion 3 - Luigi’s Nightmare Trailer - Nintendo Switch
 * E3 Vlog Day 2 - Gettin’ Spooked in Luigi’s Mansion 3 - Nintendo Minute
 * Good Hang or Tough Hang? Luigi’s Mansion 3 Edition - Nintendo Minute
 * Luigi’s Mansion 3 - Nintendo Direct 9.4.2019 - Nintendo Switch
 * Nintendo Switch My Way - Luigi’s Mansion 3
 * NEW Luigi’s Mansion 3 Co-op Game Play w/ Developer Commentary
 * Luigi's Mansion™ 3 - Available 10/31 - Nintendo Switch (15s)
 * Luigi's Mansion™ 3 - Trick or Defeat (10/31) - Nintendo Switch 0:30
 * Luigi's Mansion™ 3 - Trick or Defeat (10/31) - Nintendo Switch
 * Luigi’s Mansion 3 - ScreamPark Mode - Nintendo Switch
 * Mr. Tanabe & Mr. Ikebata Spin the Wheel - Luigi’s Mansion 3