Well, you could include Hilda from Pokemon. She's a strong and adventurous character who would be really curious about the Yo - Kai. For Yo - Kai, you could have Komajiro. He could be the little troublemaker who gets into all kinds of scrapes with the Pokemon. And Professor Oak could also be in the fanfic. He could be fascinated by the Yo - Kai and try to study them, while also helping the trainers understand the new situation they're in.
Well, you could have a story where a Yo - Kai possesses a Pokemon. This causes the Pokemon to behave strangely and the trainer has to figure out what's wrong. They end up having to journey into the Yo - Kai world to find a cure. Or perhaps there's a legend in the Pokemon world about a powerful Yo - Kai, and a group of trainers go on a quest to find it, thinking it might have some connection to a rare Pokemon.
You could include the Gym Leaders from Pokemon Ruby. They have distinct personalities and battle styles. For example, Wallace, the Sootopolis City Gym Leader. His elegance and powerful Water - type Pokemon make him a great character. Another interesting character could be Steven Stone. He's a strong trainer and a bit of a mystery. And of course, the Team Magma or Team Aqua grunts. They add an element of conflict to the story.
She might meet Jibanyan, a very popular Yo - kai. He's often involved in all kinds of Yo - kai related things and could be a great friend to Katie.
The main character is a young boy who has the Yo - kai Watch. There are also some important Yo - kai characters that often appear, like Jibanyan, a cat - like Yo - kai.
The main character is usually a young boy or girl who has the ability to see Yo - Kai. There are also some Yo - Kai friends that are always by their side, like Jibanyan, who is a very popular and friendly Yo - Kai.
Seto Kaiba and Gary Oak would make for a fascinating pair in a crossover fanfic. Kaiba's arrogance and Gary's self - assuredness could lead to some intense rivalries. They might compete to see who can be the best in both the Yugioh and Pokemon worlds. Another interesting character would be Serena. Her kind - hearted nature could be a contrast to some of the more intense Yugioh characters. She could form bonds with the Duel Monsters in a different way than the other characters, perhaps using her compassion to calm down some of the more aggressive ones.
Jibanyan would be a great addition. He's Nate's main yo - kai partner, and his goofy yet brave personality can add a lot of humor and action to the story. For example, he could get into some trouble while trying to protect Nate and Katie.
A common theme is the crossover of the two worlds. Writers like to explore how the different species from yo - kai watch and pokemon would interact. For example, they might have a friendly competition or team up against a greater evil.
One great piece of yo - kai watch pokemon fanfiction is 'The Yo - kai and Pokemon Alliance' on FanFiction.net. It has an interesting plot where the characters from both universes team up to face a common threat. The author does a great job of blending the unique elements of each franchise.
A great 'yo kai watch 4 fanfiction' might involve a time - travel plot. The main characters go back in time to the era when the first Yo - kai were created. They have to figure out how to return to their own time while also learning about the origins of the Yo - kai and how they came to be so important to the world they live in.