One idea could be a crossover with Sherlock Holmes in the human world. The great mouse detective could team up with Holmes to solve a mystery that spans both the mouse and human realms. Maybe there's a villain causing chaos in both worlds and their combined skills are needed.
The OC could be from a different part of the mouse world with unique skills, like being able to communicate with certain insects that can help in solving crimes. For example, they could get information from a spy spider about a villain's lair location. The OC then teams up with the great mouse detective to use this new lead to solve a big case.
One idea could be Basil solving a mystery in a new, strange part of the mouse city, like an abandoned underground area filled with old secrets. Another could be Basil teaming up with a new, young mouse detective in training to solve a case that's baffling the entire mouse detective community. Or perhaps a story where Basil has to solve a mystery on a ship sailing to a far - off mouse - inhabited island.
An OC who is a street - smart mouse with a network of informants all over the city could be interesting. This OC could come across a strange occurrence that they think Basil should know about, leading to a new adventure. They could provide Basil with valuable leads from their connections on the streets.
Definitely Sherlock Holmes. Since The Great Mouse Detective is inspired by Sherlock Holmes, a crossover with the original Holmes would be very interesting. They could compare and contrast their detective methods.
One idea could be a crossover with Sherlock Holmes. Conan could meet Holmes in London and they could solve a complex mystery together. Holmes' deductive skills and Conan's modern knowledge would make for an exciting combination.
One interesting story could be about the great mouse detective solving a mystery in an old, abandoned cheese factory. The clues are hidden among the cheese wheels and old machinery.
One idea could be a mouse that has magical powers and becomes friends with Harry. It could help him in secret ways, like finding hidden passages in Hogwarts by squeezing into tiny holes that humans can't reach.
She could be turned into a mouse - like creature by an experimental akuma attack. As a mouse, she discovers new parts of Paris that are usually hidden from humans. This could include secret underground tunnels or the rooftops in a whole new perspective. She might also meet other kwamis who are more active in these hidden areas.
One interesting plot idea could be that a group of monkeys in the Forbidden Forest have been stealing wands from wizards who wander too close. The main characters in the fanfiction, including Harry Potter and his friends, have to figure out why the monkeys are doing this and how to get the wands back. Regarding a mouse, it could be a key to unlocking a hidden prophecy. The mouse has a special mark on its back that only shows up under a certain magical light. The students at Hogwarts must protect the mouse from dark wizards who also want to use it to gain power.
One possible plot could be that Bendy and Mickey Mouse find themselves in a strange, mixed - up world. They initially misunderstand each other due to their different natures. Bendy is from a more dark and spooky world, while Mickey is from a bright and cheerful one. But as they face common enemies like a powerful ink - based monster that threatens both their worlds, they start to work together. They combine their unique skills, Mickey's charm and positive attitude and Bendy's stealth and ability to navigate in dark places, to defeat the monster and in the process, they learn to respect and appreciate each other's differences.