There's a fanfiction called 'Kingdom Hearts: Pokemon Edition'. It takes elements from Kingdom Hearts like the Heartless and mixes them with the concept of Pokemon. The story follows a group of trainers who discover a connection between the two worlds and must fight to protect both. It has a really interesting plot that keeps you hooked from start to finish.
One idea could be a crossover where Sora and his friends from Kingdom Hearts end up in the Pokemon world. They could team up with trainers to battle against the Heartless that have somehow invaded the Pokemon realm. Another idea is that some Pokemon could have the power of Keyblades, and they use it to protect their regions from both Pokemon villains and the threats from Kingdom Hearts like Organization XIII. Maybe a Pokemon like Pikachu could befriend Sora and they go on an adventure together to find a way to get Sora back to his own world while also helping the Pokemon world.
One idea could be a story where the Pokemon trainers are transported to the Kingdom Hearts universe and have to team up with Sora and his friends to fight against the Heartless. They could use their Pokemon's unique abilities in combination with keyblades to defeat the enemies.
To start a Pokemon Kingdom Hearts fanfiction, study the lore of both. Consider how the Heartless might be affected by Pokemon abilities or vice versa. Start with a strong hook, like a mysterious event that draws the two worlds together. As you write, focus on building the relationship between the characters from different worlds. Describe the new settings that result from the combination of the two universes in detail.
One main theme is friendship. Just like in the original Kingdom Hearts and Pokemon, characters form strong bonds. For example, Sora might team up with Ash and they learn to trust each other.
Well, it depends on how you look at it. Technically, in official Kingdom Hearts content, Sora is a key character. But in the realm of fanfiction, many writers take the essence of Sora and create their own unique stories that are not part of the official canon but are still inspired by the Kingdom Hearts universe. So, in that sense, he can be considered as a major element in Kingdom Hearts fanfiction.
One idea could be that Tangela gets transported into the Kingdom Hearts universe and has to team up with Sora to find a way back to its own world. Along the way, Tangela discovers new powers that are a combination of its Pokemon abilities and the magic in the Kingdom Hearts world.
I think Aqua would be an interesting character to be paired with in Pokemon fanfiction. Given her strong will and combat skills, she could be a great trainer. She might be particularly interested in Water - type Pokemon and train them to be extremely powerful. Roxas could also be a likely character. His connection to Sora and his own unique fighting style could make for an exciting story. He could be on a journey to discover more about himself while also exploring the Pokemon world. And of course, King Mickey. His leadership and magical abilities would make him a formidable ally in the Pokemon world. He could lead a group of trainers and Pokemon against a great threat, like a new type of Heartless - like Pokemon.
Well, in the Kingdom Hearts universe, there's no official indication that the characters read fanfiction. But it's an interesting thought. If they did, Sora might be a bit confused at first, since fanfiction can have all sorts of wild interpretations. He'd probably take it in stride though, with his positive and open - minded nature.
The Kingdom Hearts and Harry Potter crossover is quite popular. You can have Sora and his friends exploring Hogwarts. The contrast between magic in the two universes is fascinating. For instance, Keyblade wielding in the halls of Hogwarts is an amazing concept.