Another interesting fanfiction could focus on the characters who are drawn to the sound of the Hakate cave bells. For instance, a young adventurer hears the bells from afar and is compelled to enter the cave, not knowing what awaits inside. This could lead to a series of self - discovery and dangerous encounters.
First, do some research on the existing Hakate lore. If there are any details about the cave bells already, use them as a foundation. For example, if it's known that the bells have a certain color or shape, incorporate that into your story.
One idea could be exploring the relationship between Ayla and the different members of the clan in more depth. For example, how she really changed their views over time.
There could also be a story where a destination wedding in a far - off and magical place is the centerpiece. The couple discovers new things about each other and their relationship while dealing with the cultural differences and beautiful scenery of the location.
One idea could be exploring the backstory of the Mimiga. Maybe there was a time before the events of the game when they had a more complex society. Another is to focus on Quote's life after the main story, like how he adapts to a more peaceful world. Or you could create a fanfic where an unknown Mimiga has special powers and becomes a key figure in saving the island from a new threat.
One more plot could be that Zarbon time - travels. He goes back in time and meets his younger self. He tries to change some of the events in his past that led him to be a somewhat villainous character. But in doing so, he risks changing the entire future of his race and the universe he knows.
How about a fanfiction where Orochimaru is transported to a different dimension where ninjutsu doesn't exist? He has to adapt and use his wits and knowledge in a completely new way. This would be a great way to explore his character without any adult themes. Or a story where Orochimaru tries to atone for his past sins by helping to rebuild a village that he once destroyed, showing a different side of his complex character.
One idea could be exploring the backstory of the main character in 'The Black Flamingo' more deeply. Maybe their childhood experiences that led them to become who they are in the story.
One interesting Harry Potter fanfiction could be a story that focuses on the Marauders' time at Hogwarts. It might explore their pranks in more detail and their relationships with each other. Another could be a story where Hermione has a different kind of magic that she discovers, which changes the way she interacts with the wizarding world. And there could also be a fanfiction that delves into what would happen if Voldemort had a change of heart early on in his life and didn't become the dark wizard he was in the original series.
One idea could be a crossover with a popular RPG. The protagonist of Cave Story could find themselves in the world of the RPG, facing new enemies and having to learn different magic or combat systems. For example, if it's a Final Fantasy - like world, they might have to deal with complex job classes.
One plot idea could be that Naruto, in his never - ending pursuit of understanding different shinobi abilities, meets Deidara during one of his missions outside the Hidden Leaf. Deidara, being an artist at heart, is intrigued by Naruto's determination and they end up having a series of battles and conversations that gradually change their views of each other. Another could be a time - travel plot where Naruto is sent back in time and has to deal with a younger Deidara and tries to prevent him from joining the Akatsuki.