Luigi’s Mansion III (Nintendo Cinematic Universe)

Luigi's Mansion: Dark Moon is a Japanese anime film.

Summary
Luigi is invited to stay at a hotel with Mario and Pricess Peach...which turns to be yet another trap by King Boo.

Plot Elements

 * Luigi, Mario, Princess Peach, and three 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, they head inside the Grand Lobby during broad daylight and check in at the front desk with the hotel's bellhop/receptionist, Steward. They are introduced and later escorted by the owner of the hotel, a mysterious woman named Hellen Gravely, to their fifth-floor rooms.
 * Princess Peach is seen heading towards her respective hotel room (Room 501), Mario to his (Room 502), and finally Luigi to his own (Room 503). Inside his hotel room, Luigi starts to read a novel and immediately falls asleep.
 * Luigi later wakes up on a dark night and hears Peach screaming, the hotel's atmosphere now haunted with everyone but him gone missing. He gets out of bed with simply a flashlight in hand, exits his room, and sees mysterious purple energy lurking through the hallway. He walks towards the floor's elevator to be greeted by Hellen Gravely coming out of the opened elevator and revealing herself as a ghost. Hellen explains she invited Luigi and his friends out of admiration for her idol whom she reveals as none other than Luigi's arch-nemesis, King Boo, much to Luigi's horror.
 * King Boo explains that Hellen had freed him from Professor E. Gadd's ghost containment and announces his plan for revenge upon Luigi, showing his friends in portrait frames. He proceeds to chase Luigi through the hallway to trap him in a picture as well while placing Spirit Balls on all the hotel room doors, and corners him at the end of the hallway. However, Luigi manages to escape by jumping into a laundry chute and falls all the way into a laundry hamper in the Basement.
 * Luigi is woken up by Polterpup and manages to find the Poltergust G-00 inside a red car. He finds Professor E. Gadd trapped in a portrait as well on the Mezzanine's second floor and frees him by using the Dark-Light Device he finds in a vault.
 * The newly freed professor asks Luigi to escort him out of the hotel, but he decides to stay when Luigi refuses to leave before saving his trapped friends.
 * After Luigi and Professor E. Gadd return to the garage and the former defeats Steward, E. Gadd sets up his portable lab and gives him the Virtual Boo for communication. Professor E. Gadd then asks Luigi to retrieve his briefcase from the fifth floor, where Luigi recovers it from Chambrea and brings it back to him. The contents of the briefcase allow Luigi to call on Gooigi, a green, gooey replica of him, for help.
 * While searching the hotel for his friends, Luigi must also recover the missing elevator buttons from Boss Ghosts to access all floors; in two instances, he must track down and battle Hellen Gravely's pet, Polterkitty, who steals the buttons just as he is about to install them in the elevator and hides in the previous floors. Luigi also manages to rescue the three Toads, who wait in E. Gadd's lab after being saved and escorted to the elevator. However, as he saves each of them, Hellen, observing from security monitors, grows more and more furious with his success.
 * Once Luigi saves the third Toad, King Boo, having lost faith in Hellen, takes one of the last two paintings, Mario and Peach, in his possession.
 * Luigi reaches the last floor, the Master Suite, but as soon as he arrives, Hellen Gravely appears on a large screen and reveals she has Mario's painting in her possession (meaning King Boo has Peach's), challenging him to confront her.
 * Once Luigi navigates through the various traps and puzzles, he finds the four keys that lead to Hellen's office. Hellen furiously berates him for capturing her staff and Polterkitty along with costing her King Boo's approval. To redeem herself in King Boo's eyes, she proceeds to battle Luigi directly.
 * Luigi defeats and captures Hellen Gravely and then frees Mario, who then leads him to the Rooftop. There they find Peach's painting, and Luigi sets her free. However, the group's embrace is interrupted when King Boo confronts them and reveals that he absconded with E. Gadd's lab, trapping E. Gadd and the three Toads in the same painting. He attempts to do the same to Mario, Peach, and Luigi, although he manages to get only the former two as Luigi is shoved out of the way at the last second by Polterpup.
 * King Boo, having lost his patience, then engages in battle with Luigi.
 * With Gooigi's help, Luigi triumphs over King Boo once more before the Boo can entrap them all in the painting, although the hotel collapses immediately after the battle.
 * Luigi is saved by Polterpup again and releases his friends from the painting.
 * Several ghosts emerge from the ghost canister, although they calm down and become hospitable when the purple gem from King Boo's crown dissolves.
 * The ghosts are saddened to see the hotel in shambles, so Luigi and his friends work with them to rebuild the hotel in E. Gadd's image.
 * With the new hotel finished and King Boo imprisoned once more, E. Gadd, Gooigi, and the hotel ghosts wave farewell as everyone else departs for home on the charter bus. Luigi falls asleep on the bus with Polterpup as it rides into the sunset.