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.
A group of veteran trainers from different regions who initially start on opposing sides but then realize the futility of war and try to broker peace. Each of them could have their own backstory, like one trainer who lost his family in a previous Pokemon - related conflict and is now reluctant to fight again.
An old and wise Pokemon professor who has knowledge of a powerful but long - forgotten Pokemon technique. He could be kidnapped by one region in an attempt to use his knowledge against the others. His students then become the main characters as they try to rescue him and stop the war.
There might be a young and determined trainer as one of the main characters in 'the great pokemon war fanfic'. This trainer could be on a quest to end the war and bring peace. Alongside him or her, there could be a group of unique Pokemon with special powers. There may also be an antagonist, perhaps a power - hungry trainer who started the war in the first place. And perhaps some side characters like a wise old Pokemon professor who gives advice to the main characters during the war.
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.
A great plot might be that a new, evil organization has emerged and is pitting different regions against each other by spreading false rumors about each other's intentions. For example, they tell one region that another is planning to steal all their rare Pokemon. As a result, the regions start mobilizing for war. The fanfic could then focus on how trainers from different regions come together to expose the truth and stop the impending war.
Miku could be a central character. She's one of the most well - known Vocaloids, and she could be leading the fight against an evil force trying to take over the Vocaloid realm.
The main characters might not only be human trainers. Some Pokemon could take on leading roles. For example, a powerful and wise Charizard could be a main character. It might have been trained by a famous trainer in the past but now fights independently against Team Rocket. There could also be a group of Eeveelutions that are the main focus. They have different abilities and personalities, and together they form a force to be reckoned with against Team Rocket. Alongside them, there could be a trainer who acts as a guide or coordinator for their efforts.
Another possibility for main characters could be Rainbow Dash from MLP and Blastoise from Pokemon. Rainbow Dash is brave and loves adventures, which would be perfect for exploring the new Pokemon world. Blastoise is strong and reliable. They could form a great team, with Rainbow Dash using her speed to scout ahead and Blastoise using its water attacks to protect them from danger.
It could be an experienced trainer who has a team of fully - evolved Pokemon. This trainer might be taking a break from their usual battles and just wants to relax at the beach with their Pokemon pals. Maybe they have a Charizard that enjoys sunbathing on the warm sand.
The main character could be a young trainer who just transferred to the Pokemon high school. He or she might be shy at first but has a really strong bond with their starter Pokemon, like a Pikachu. This character would grow throughout the story, making new friends and facing various challenges related to Pokemon training and school life.
A Pokemon researcher could be the main character. They are studying the phenomenon of the draining kiss when they themselves become a target. This sets them on a journey not only to save themselves but also to understand the implications of this strange Pokemon behavior on the entire ecosystem of the Pokemon world.