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 sometime in 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, which they travel to via a bus. Soon after they arrive inside the Foyer during broad daylight, they are then directed by a female purple ghost to take the elevator upstairs and stay on the fifth floor. Inside his hotel room, Luigi reads a novel whilst on his bed and quickly takes a nap alongside Polterpup, later having woken up during midnight with everyone but Luigi gone missing, having been turned into paintings by King Boo. Luigi exits his hotel room with simply a flashlight only to later find King Boo in the hallway on the respective floor. To save the rest of the gang, Luigi has to navigate over seventeen stories (two below ground and fifteen above ground)   of the hotel by collecting the elevator buttons from character-like ghosts. He also needs to defeat the ghosts with the help of Professor Elvin Gadd, using a new Poltergust called the Poltergust G-00.

Gameplay
Luigi's Mansion 3 plays much like the two previous entries in the series, Luigi's Mansion and Luigi's Mansion: Dark Moon. The Poltergust G-00 retains the basic qualities of the previous vacuums, as well as the Strobulb item and the Dark-Light Device. 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.

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. Luigi and Gooigi cannot be controlled at the same time in single-player, but Gooigi can be controlled by a second player with the second Joy-Con controller. 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 eight-player multiplayer (four Luigis and four Gooigis) to clear either 5, 10, or a random amount of floors with a five minute limit for each floor. The mode also features procedurally generated floors, with challenges such as Capture the Ghosts!, Find the Toads!, and Collect the Money!. It acts very similar to its prequel appearance, though adds new abilities such as the super suction, super strobe, a trapdoor detector helmet, voice chat, and the Blackout. ScareScraper is more challeging than story mode, however.

Controls

 * + : Burst
 * Blow
 * Suck
 * Skip cutscene
 * Pause menu
 * ///: Show map
 * + /: Action/Dark-Light
 * /: Strobulb/Slam
 * Change movement
 * /: Suction Shot
 * Move
 * Turn
 * (×1 down): Summon/select Gooigi
 * (×2 down): Store Gooigi
 * Tilt : Aim up/down

Playable characters

 * Gooigi
 * Luigi

Supporting characters

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

Ghosts

 * Bats
 * King Boo
 * King McFright
 * Spirit Ball

Other

 * Crows
 * Rats
 * Spiders
 * Trapdoor

Items and treasures

 * Bills
 * Coins
 * Gemstones
 * Gold Bars
 * Hearts
 * Treasure Chests
 * Keys
 * Pearls

Known information

 * Blue ghosts that look similar to Hiders from Luigi's Mansion: Dark Moon appear, with each having 100 HP.
 * Red ghosts with square heads that look similar to Slammers appear with 200 HP.
 * Skinny yellow ghosts appear with 100 HP.
 * Gold and silver variants of the blue ghost that act similar to Gold Greenies and Speedy Spirits appear with 125 HP.
 * Purple ghosts that look similar to Sneakers and Ceiling Surprises appear with 120 HP.
 * Polterpup returns and serves as the tutorial guide.
 * The debut trailer shows that the hotel is set in the mountains with a river, fog, trees, bats, and the full moon in the background. At the very top of the hotel, there is a purple gem.
 * Unique ghosts similar to Portrait Ghosts appear. Among them are an unnamed policeman ghost, a medieval king ghost named King McFright with 200 HP on the sixth floor for the seventh elevator button   and a French film director ghost named Morty on the eighth floor for the ninth elevator button  who tasks Luigi with finding his megaphone and later films a boss fight against a ghost in a kaiju costume, which is available for replay.
 * Luigi has a new device known as the Virtual Boo, which serves the same function as the Game Boy Horror and Dual Scream. It also includes an "E. Gadd Hotline" feature that provides hints on various puzzles.

Rooms

 * A trashed room with many pizza boxes and a suitcase with Mario's emblem on the fifth floor.
 * A fifth floor hallway with cleaning supplies and numbered doors.
 * A dining room with a lot of food, some on the ground.
 * A Foyer with hanging pictures of Luigi, Mario, Toad, and Princess Peach, all having an "X" across them. In the back is a mail room, with a safe that needs a Strobulb flash to open.
 * A theater entrance, with a Hider-like ghost moving the rug underneath Luigi.
 * A garage similar to the one in Dark Moon, but with a red car rather than a blue one in the Basement.
 * A production studio with various movie sets and televisions that function as teleporters on the eighth floor.
 * A medieval castle based room featuring a dungeon and an arena on the sixth floor.
 * A 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 clover, heart, diamond, and spade alongside them respectably, along with a cafe in the upper center portion.
 * A nature area, which can be seen from a dome-like structure on the Last Resort's fourth floor.

References to other games

 * Mario Bros. (Game & Watch): The pizza boxes in the trashed room say "Since 1983," referencing Luigi's debut appearance in this game.
 * Super Mario Sunshine: The Coins make a similar sound effect when collected like in this game.
 * Mario Strikers Charged: In one of the hallways in the theater, a framed poster of Mario performing his Mega Strike can be seen.
 * Punch-Out!! (Wii): In one of the hallways in the theater, 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 a green boxing glove similar to Little Mac's to come flying out.

References in other games

 * Super Smash Bros. Ultimate: Luigi uses the Poltergust G-00 as part of his moveset and Final Smash.

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. While in development for the Nintendo Switch, Luigi's Mansion 3 was a working title. 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-Cons for multiplayer mode. The Slam and Burst moves were planned during the Wii U version.

Voice

 * Charles Martinet
 * Sam Kelly

Other

 * Bryce Holliday
 * Kensuke Tanabe
 * Yoshihito Ikebata