Some interesting ideas for Coraline fanfiction could involve Coraline's relationship with her parents after the events of the movie. Maybe she tries to get them to understand a little bit of the magic she experienced without scaring them. Or you could write about Coraline meeting other children who have had similar experiences with other worlds. This could lead to a whole new adventure as they try to figure out the secrets behind these strange worlds.
One idea could be a crossover with "Alice in Wonderland". Coraline could fall through a different kind of portal and end up in Wonderland. She could meet the Cheshire Cat and have some interesting conversations about the strange worlds they both come from. Another idea is a crossover with "The Nightmare Before Christmas". Coraline might visit Halloween Town and be both intrigued and a bit scared by the spooky inhabitants.
One idea could be a crossover where Coraline accidentally stumbles into Halloween Town from The Nightmare Before Christmas. She could be initially scared but then start to explore and make friends with some of the spooky residents like Jack Skellington. Maybe she helps Jack understand the concept of a more 'normal' world, while he shows her the wonders of his magical and strange town.
A plot could involve Coraline getting lost in Norman's town and Norman has to help her find her way back home. Along the way, they discover that there are some common elements in the spooky things happening in both their places. For example, the same kind of magic or curse is at work, and they use their unique skills to figure it out. Norman with his ability to see ghosts and Coraline with her courage and inquisitive nature.
A fanfiction where they discover a hidden part of the real world that has a connection to the Other World. Maybe an old, abandoned house in their neighborhood that holds secrets and ancient magic. They explore it together, trying to figure out how it relates to the events in the Other World they already know.
An idea could be that the button eyes are a portal to another dimension within the other world. Coraline discovers this accidentally and has to navigate through this new and even stranger place. It would add a new layer of mystery and adventure to the story.
There's also 'Coraline and Naruto's Adventure'. This one has Coraline and Naruto going on a quest together. They encounter strange creatures from both of their worlds. The story has a lot of action and some really cool moments where Naruto's jutsu are combined with Coraline's quick thinking to overcome obstacles.
How about a fanfic where Coraline and Wybie are the only ones who can see a strange, magical creature that is causing chaos in their town? They have to team up with some of the odd characters from the other world (who can also cross over) to stop it. Or a story where Coraline and Wybie are transported to a completely different realm that has no relation to the other world, and they have to find their way back home while also learning about this new place.
Definitely Coraline. She's not only brave but also very intelligent. She figures out the tricks of the Other world and how to get back home. The Other Mother is one of the most interesting characters. Her duality - appearing nice but being truly evil - makes her complex. And the old ladies who live upstairs are interesting. They seem to know more about the Other world than they let on.
The characters are a big part of it. Coraline herself is a brave and curious girl. And the other mother is such a menacing and mysterious figure. Their interactions add a lot of tension and intrigue to the story. Also, the small details like the button eyes are both creepy and fascinating, which makes the story stand out.
The Coraline graphic novels often have stunning visuals. The art style is able to bring the spooky and magical world of Coraline to life vividly. The use of color, for example, can enhance the mood, with darker tones in the scarier parts of the story.