One of the top stories could be the encounter with the various bosses on different floors. Each boss has its unique design and backstory, like the sea - themed boss on one of the lower floors. Another top story might be Luigi's exploration of the different themed floors, such as the spooky circus floor.
For a Luigi's Mansion and Super Smash Bros. crossover fanfiction, Luigi could be in the middle of a Smash Bros. battle when a portal to his mansion opens up. Characters from the Smash Bros. roster get accidentally sucked in. Luigi has to lead them through his mansion, fighting off the more dangerous ghosts. Some characters like Kirby might try to eat the ghosts, while others like Link would use their weapons. Along the journey, they discover secrets about Luigi's Mansion that Luigi himself didn't know, all while trying to find a way back to the Smash Bros. arena.
Luigi's Mansion 3 story doesn't offer online coop. It's designed for local cooperative play, which means you need to have another person physically with you to play together.
One idea could be exploring Luigi's character growth. Maybe he discovers a new power within the mansion that helps him face his fears more bravely. Another idea is to create a backstory for the ghosts in the mansion, like how they came to be there and what their lives were like before. A third idea could be a crossover where characters from another game enter Luigi's Mansion, creating new and exciting adventures.
The story is about Luigi being called to investigate a series of hauntings at Evershade Valley. He uses his Poltergust to capture ghosts and solve the mysteries. There are different mansions with their own unique challenges and ghost types. Luigi has to face all these spooky situations to restore peace in the valley.
In a Luigi's Mansion and Pokémon crossover, a plot point could be that a rare and powerful Pokémon has been trapped in the mansion by an evil ghost trainer. Ash and his Pikachu arrive to help Luigi. Pikachu uses its electric attacks to stun the ghosts while Luigi captures them. They explore the mansion, looking for the Pokémon. Along the way, they encounter different types of Pokémon that have also been affected by the mansion's spooky aura. Some have become ghost - like themselves and Ash has to figure out how to help them while also finding the trapped Pokémon.
First, think about the main character, which is usually Luigi. Decide what his goal or motivation will be in the story. For example, it could be to rescue Mario who has been captured by a powerful ghost. Then, come up with a setting within the mansion. Is it a particular floor or room that's important? After that, start writing a simple introduction that sets the mood, like 'Luigi stepped into the dark and eerie Luigi's Mansion, his heart pounding with fear but his determination strong.'
A plot could revolve around Luigi having to rescue all the Toads that have been scattered throughout the mansion in different forms - some are invisible, some are trapped in paintings. As he searches for them, he uncovers secrets about the mansion's original owner and their dark past.
Luigi is the central character in the Luigi's Mansion Dark Moon story. He is the one who is called upon to solve the mystery of the shattered Dark Moon. There are also Professor E. Gadd who provides Luigi with the tools like the Poltergust to help him in his quest. And of course, there are numerous ghosts which range from common ones to more menacing boss ghosts. These ghosts are the ones that Luigi has to capture in order to complete his mission.