Luigi's Mansion 4: The Lone Ghost

Plot
One day, Luigi received a letter. The letter was sent by Hellen Gravely, the owner of a cruise ship that crosses the seas. When Luigi opened it, he discovered that it was a special invitation! ''Congratulations, Luigi! You're the lucky winner of a free stay at a world-class resort cruise, The Final Destination We look forward to dazzling you with first-rate hospitality and service. Please be sure to invite any friends or family that you'd like to bring, as well!" -Hellen Gravely'' Luigi was overcome with excitement at the letter and rush to go on the cruise alone.  Soon, he departed for the cruiseship. Upon arriving at the harbor, Luigi was strangely warmly welcomed by Hellen Gravely herself! Afterward, he was shown to his rooms. Luigi notices a locker room, that had two lockers in it. Each locker holds the Poltergust G-00, and the Poltergust 3000. Little did he realize it was all a trap put in motion by Hellen Gravely in order to revive the God of the Mirrors, Leinth.  Awakened in the night by the evil laugh of Hellen Gravely and King Boo, Luigi found a hotel swarming with ghost and demons.  Not only that, but the toads who got on the cruise ship in secret  have been sealed away, and it turns out the lockers that hold the Poltergust G-00, and the Poltergust 3000 have been broken. Is Will Luigi be able to rescue his trapped friends and escape the cruise ship in one piece, or will they be stuck on the cruise ship sailing the haunted seas forever?

Luigi
Luigi is a heroic, kind and sensitive character. Luigi is optimistic, cheerful, quiet and kind-hearted like his brother, but unlike Mario is most shy, fearful and can be goofy and naive at times, Luigi aspires to be like his brother Mario and become the hero of the Mushroom Kingdom.

Gooigi
Gooigi reappears in Luigi's Mansion 4, where the player can use him to reach certain areas that Luigi cannot reach, such as areas behind bars, past spikes, or through grates. However, he melts if he touches water and disintegrates if he touches fire. Gooigi is unable to open doors, although he can still insert keys in them to unlock them. Gooigi can also vibrate when Luigi is near a door and enters a room where a Boo is hidden; the closer Luigi is to the Boo, the more Gooigi vibrates.

Gameplay
Luigi's Mansion 4, plays much like the two previous entries in the series, returning to a singular setting much like the first game while featuring a variety of themed floors akin to the second game's mansions, allowing the player to re-explore already completed rooms.