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 charter bus driven by Toad. Soon after they arrive inside the first/second floor Lobby during broad daylight and all check in at the front desk, they are then escorted by a mysterious purple ghost woman to take the elevator on the second floor within the Lobby upstairs and the gang all stay on the fifth floor. Inside his hotel room, Luigi reads a novel whilst laying on a bed and quickly takes a nap alongside Polterpup, later having woken up during midnight 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 fifth floor hotel room only to later find King Boo in the hallway on the respective floor attempting to suck Luigi into a painting. To save the rest of the gang, Luigi has to navigate over seventeen stories (two below ground, fifteen above ground, and a roof)    in no particular order of the hotel 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 the Basement (B1), using a new Poltergust called the Poltergust G-00. 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 Poltergust G-00 retains the basic qualities of the 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, a parody of the Virtual Boy, which serves the same function as the Game Boy Horror and Dual Scream. The money collected with the Poltergust G-00 can be used to buy Gold Bones and also to buy hints from the Virtual Boo's E. Gadd Hotline to find in-game floor themed collectible gems and other various puzzles. The HD Rumble is felt through the Joy-Con while using the Poltergust G-00.

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. 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 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 eight-player co-op 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 and functions such as the super suction, super strobe, a red siren trapdoor detector helmet, voice chat, and the Blackout. ScareScraper is more challenging than story mode, however.

Controls

 * + : Burst
 * Blow
 * Suck
 * Skip cutscene
 * Pause menu/call "Mario!"
 * ///: 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

 * Luigi
 * Gooigi

Supporting characters

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

Normal Ghosts

 * Blue ghosts that look similar to Hiders and Greenies (100 HP)
 * Red ghosts with square heads that look similar to Slammers (200 HP)
 * Skinny yellow ghosts that look and act similar to Hiders (100 HP)
 * Purple ghosts that look similar to Sneakers and Ceiling Surprises (120 HP)
 * Gold and silver variants of the blue ghost that act similar to Gold Greenies and Speedy Spirits (125-250 HP)
 * Spirit Balls

Unique Ghosts

 * King McFright (200 HP), a Scottish medieval king, on the sixth floor for the seventh elevator button
 * King Boo
 * A blue bellhop ghost seen in the Lobby that is suckable while inside the Basement (B2)
 * A female purple ghost that wears a long dress and sunglasses in the Lobby
 * Morty, a French film director, on the eighth floor for the ninth elevator button
 * A policeman or security ghost

Other

 * Bats
 * Crows
 * Mouses
 * Spiders
 * Trapdoor

Items and treasures

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

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 and is partially medieval themed, a greenhouse dome-like structure on the seventh floor, a sand themed floor on the the tenth floor, a metal dome-like structure on the thirteenth floor, a pink and blue neon lighted exterior on the fifteenth floor, and a King Boo structure with a lighted purple gem on top its head on the eighteenth floor.
 * King Boo returns and is seen on the fifth floor hallway chasing Luigi and uses his crown to place Spirit Balls on hotel room 503.
 * Princess Peach makes her first physical appearance in the Luigi's Mansion series.

Rooms

 * A garage similar to the one in Luigi's Mansion: Dark Moon, but with a red car rather than a blue one in the Basement.
 * A first/second floor Lobby with hanging pictures of Luigi, Mario, Toad, and Princess Peach, all having an "X" across them. In the back is a cubby section behind the front desk with over thirty five mail inboxes, with a safe that needs a Strobulb flash to open.
 * 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 on the sixth floor.
 * A medieval castle based room featuring a dungeon and an arena on the sixth floor.
 * A production studio with various movie sets and televisions that function as teleporters on the eighth floor.
 * A nature area, which can be seen from a dome-like structure on the Last Resort's eighth 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 club, heart, diamond, and spade playing card suits alongside them respectably, along with a cafe in the upper center portion.
 * A theater entrance, with a Hider-like ghost moving the rug underneath Luigi.

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 64: There is a poster on the wall in a music theater area on the fifth floor with a painting of an angry piano.
 * Luigi's Mansion: There is a shopping mall area 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.
 * 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 and another framed poster showing a bunch of characters running together from an aerial view.
 * 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.
 * Luigi's Mansion: Dark Moon: In one of the hallways in the theater, a framed poster of Luigi pointing the Poltergust 5000 towards King Boo is seen. 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.  The ScareScraper mode also returns.

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, though started development for Nintendo's next generation console in the earnest following the completion of Next Level Game's Metroid Prime: Federation Force. The Slam and Burst moves were planned during the Wii U version. 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. 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 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 mansion. However, as it was not possible to include a TV in every room, the idea of using this mechanic throughout the entire mansion was scrapped in favor of the elevator idea.

Notable mistakes and errors

 * One of the "S" symbols above the double dungeon door on the sixth floor for King McFright's arena area is mirrored, along with a "S" symbol on a outer double dungeon door.

Voice

 * Charles Martinet
 * Sam Kelly

Producers

 * Bryce Holliday
 * Kensuke Tanabe
 * Yoshihito Ikebata