Giovanni, the leader of Team Rocket. You could explore his backstory more deeply in fanfiction. Maybe write about how he came to lead Team Rocket, his motives, and what could have made him turn to a life of crime in the Pokemon world. There's a lot of potential for complex character development there.
Professor Oak is a great character to include. He could be the source of some new research quests for the fanfiction characters, or he could be in trouble and need the help of the main character in the story.
Definitely Red. He's the iconic protagonist of the game, and there are so many ways to expand on his story. You could write about his post - game adventures or what he was thinking during his original journey.
Red is definitely a popular character to feature. He's the main protagonist in the games, so many fanfictions revolve around his further adventures or his backstory. Another popular one is Pikachu, the iconic Pokemon. You can write all sorts of stories about Pikachu's relationship with Red or other trainers. And of course, Blue is often in fanfictions as well, as he's Red's rival and their dynamic can be explored in many ways.
Gary Oak is also popular. He can be portrayed as a more complex character in fanfiction. Maybe a story where he teams up with Ash against a greater threat, or a plot where we see his own personal growth and struggles as a Pokemon trainer in the context of the Yellow and Red games.
Red is an obvious choice. He's the main character in the games, and his journey through the Kanto region can be further explored in fanfiction. Maybe tell a story about his training methods or his relationships with other trainers that weren't fully shown in the game.
Charizard is a very popular Pokemon to feature in a 'pokemon red and blue fanfic'. It's powerful and has a cool design. Misty, the water - type gym leader, is also a great character to include. Her feisty personality can add a lot of drama to the story. Another popular character is Brock, with his love for rocks and Pokemon. He can be a source of knowledge for the main character in the fanfic. Plus, Team Rocket's Jessie and James are always fun to have in a fanfic. Their bumbling attempts at stealing Pokemon can create some humorous situations.
Shinra is definitely one of the most popular. His unique power of the 'Devil's Footprints' and his determination to find answers about his family and the mystery behind the Infernals make him a great focus. Also, Arthur with his delusions of being a knight but also having real strength is a fan favorite. His comical yet brave nature often gets explored in fanfiction. Another popular one is Maki, especially for stories that focus on female empowerment within the Fire Force universe. Her strong will and powerful combat abilities make her an interesting character to write about.
Pikachu itself is extremely popular. It's the iconic Pokemon of the franchise. In fanfiction, Pikachu can be given all sorts of personalities and abilities beyond what we see in the official games. For example, a fanfic could show Pikachu as a super - intelligent Pokemon that secretly guides Ash through tough situations.
Pikachu is definitely a popular one. It's the most recognizable Pokemon and has a lot of potential for different storylines. Ash Ketchum is also a common character to feature. Trainers often like to write about his further adventures or what if scenarios for him. And Misty, with her strong personality and water - type Pokemon, is another popular choice.
Ethan or Lyra, the main protagonists of Pokemon Gold, are very popular. Writers often like to expand on their adventures and personal growth throughout the Johto region. Another popular character is Professor Elm. His research and his role in providing the starter Pokemon can be explored further in fanfiction.
Ash Ketchum is a very popular choice. His adventures in the Pokemon world are well - known, and fanfiction writers can continue his journey, give him new challenges, or even put him in alternate universes.
N is a very popular character. His complex backstory and his views on Pokemon and humans make him an interesting character to write about. He can be the center of a story exploring his journey of self - discovery.