What are the most popular themes in sonic and kingdom hearts crossover fanfiction?

There are quite a few. One interesting one might be on FanFiction.net. You can search using the tags 'Sonic' and 'Kingdom Hearts' to find crossovers that combine the high - speed, energetic world of Sonic with the complex and magical Kingdom Hearts universe. It's always fun to see how authors blend Sonic's speed and his friends' abilities with the Keyblade - wielding heroes of Kingdom Hearts.

Aqua is popular as well. Her loyalty and her own journey in 'Kingdom Hearts Birth by Sleep' make her an interesting character for crossovers. She could be paired with characters from different franchises in fanfiction. For example, if she were to cross over with a character from a magical girl anime, her strong will and magical abilities could lead to some really engaging storylines.

Some Kingdom Hearts 3 crossover fanfictions cross over with the Pokémon universe. Imagine Sora traveling to the Pokémon world, where he has to catch Pokémon instead of using the Keyblade all the time. He could form a team of Pokémon and use them in battles against Heartless that have invaded the Pokémon world. The concept of friendship and growing stronger with your companions, which is central to both Kingdom Hearts and Pokémon, is emphasized in these crossovers.

Another theme is friendship. Sora is all about making friends, and in crossovers, he forms new bonds with characters from different franchises. For example, he might become friends with Sonic the Hedgehog and they team up to fight a common enemy. It shows how his positive attitude can bridge different universes.

Sora is often very popular in Kingdom Hearts fanfiction. He's the main protagonist in the game, so many fans like to write about his further adventures or different versions of him. Another popular character is Riku. His complex relationship with Sora and his own journey with light and dark make him a fascinating subject for fanfiction writers.

The combination of different power systems. Naruto has his chakra and various jutsu, while Kingdom Hearts has magic and keyblades. Seeing how these interact, like Naruto using his Rasengan with the help of Kingdom Hearts' magic, is really exciting.

One interesting storyline could be Sora and the gang from Kingdom Hearts getting lost in the world of DuckTales. They could team up with Scrooge McDuck to search for a special keyblade that's hidden in one of Scrooge's many treasures. This would bring together the magic of Kingdom Hearts and the adventure - seeking nature of DuckTales.

Sora and Cloud are quite popular. Sora's cheerful and determined personality combined with Cloud's brooding and powerful presence make for interesting interactions. They can be portrayed as allies, learning from each other's fighting styles, or even as rivals in some fanfictions.

One of the most interesting storylines could be Riku crossing over into another Disney - inspired world where he has to team up with unexpected characters. For example, he might end up in the world of 'Alice in Wonderland' and have to navigate the strange rules and characters there while still maintaining his connection to the Kingdom Hearts universe. It would be a really cool blend of the familiar Kingdom Hearts elements with the wacky world of Wonderland.

One interesting plot twist could be the Keyblade wielders finding themselves in the world of Remnant. They might initially be confused by the Grimm and the Huntsmen system. For example, Sora could mistake a Grimm for a Heartless at first, but then realize it's a whole different kind of threat. Another could be Ruby and her team getting access to the power of the Keyblade. Ruby's scythe skills combined with Keyblade magic would make for an incredibly powerful combination. And perhaps a plot twist where the villains from both universes team up. Salem could see the power of the Heartless and use them to her advantage, while Xehanort might be interested in the power of the Maidens in RWBY.