A pokemon that is a hybrid of two different types, like a fire - and - ice - type pokemon. It would have a really unique personality, constantly in conflict between its two natures. It could be a central character trying to find its place in the pokemon world.
There could be a human character who has the ability to transform into a pokemon. This character would be very unique as they would understand both the human and pokemon worlds deeply. They could use their transformation ability to help pokemon in trouble, like when a group of pokemon is being hunted by poachers. They could transform into a large and powerful pokemon to scare off the poachers and then communicate with the other pokemon as a human to make sure they are okay.
There could be a mysterious old man who lives in a secluded forest. He has a special bond with a Pokemon that is both light and dark in nature. He gives cryptic advice to young trainers who pass by his forest, guiding them on their journey to understand the balance between light and darkness. And then there's a young girl who can communicate with Pokemon through dreams, especially those related to light and darkness.
Maybe an older priest who has a long - time companion Pokemon, like a Growlithe. He uses his experience with both the church and Pokemon to guide the younger members of the congregation, especially those who are also trainers. He helps them see how their Pokemon can be a part of their faith and not just for battling or collecting.
The main character could be a young trainer named Ash. He's always eager to learn more about Pokemon and is very friendly. Another character could be Misty, a girl who is really good with water - type Pokemon and is a bit of a tomboy. There could also be Brock, who is knowledgeable about Pokemon care and often gives advice to other students.
There's Dawn, who is very passionate about her Pokemon training. Also, Lillie from the Alola region, with her kind and gentle nature. Bianca, with her ditzy but endearing personality, could be an interesting addition to the harem in a Pokemon Games fanfic.
There could be a character named Ember, a fire - mage who has the ability to not only control fire but also transform into it briefly. She would be a fierce competitor in the Grand Magic Games, with her unique power making her stand out.
Misty could be paired with Janine as well. Misty's strong - willed nature and Janine's determination could make for a great combination. They might compete in a water - based Pokemon competition where Janine uses her Poison - type Pokemon in creative ways to overcome Misty's water - type Pokemon.
Since I haven't read it, I can't say for sure. But it's possible. In fanfics, authors often introduce new characters to add twists to the story. There could be a mysterious Pokemon or trainer who has a direct connection to Ash's 'deaty' situation.
The Kimono Girls are often overlooked. They have a connection to the Legendary Beasts in Pokemon Gold and Crystal. A fanfic could focus on their daily lives, how they came to possess their special powers related to the Legendary Beasts, and their role in protecting the balance in the Johto region. Also, the Pokedex holders in these games, like Elm's assistants, could be given more spotlight. They might have their own dreams and goals aside from just helping the professor, and a fanfic could tell their stories.
An old - fashioned Pokemon breeder who has a deep connection with the traditional ways of raising Pokemon. They could provide the main characters with valuable advice on how to make their Pokemon stronger and healthier. However, they might also be a bit stubborn about sticking to the old ways and this could cause some conflicts with the more modern - thinking characters in the fanfic.
A young trainer from an underdog region who rises to be a leader in the war effort. He or she could have a unique bond with a Pokemon that gives them an edge in battles.