Mewtwo is a very popular character in Pokemon Red fanfics. Since it's such a powerful and mysterious Pokemon, writers like to explore its thoughts, feelings, and its place in the world of Pokemon Red. Some fanfics might have Mewtwo as a key figure in a new conflict or as a guide to the main character.
Red, the main protagonist from the Pokemon Red game, is often very popular in fanfics. He is usually portrayed as a strong and determined trainer.
Definitely Pikachu. It's so iconic in the Pokemon world, and in fanfics, it often plays a central role, like being the Pokemon that saves the day in a tough situation.
There could be a Pokemon that has a really cute appearance but also has extremely powerful abilities. It becomes a fan favorite because it's both adorable and a force to be reckoned with in the story. In the pokemon red sun and blue moon fanfic, this kind of character can attract a lot of attention. It might have some special relationship with the main character, like being their first Pokemon or a Pokemon that saved their life once. This connection makes it even more appealing to the readers.
Ash Ketchum is also very popular. He is the main character in the Pokemon anime series that is based on the Red, Blue, Green and Yellow games. Fanfics often explore different versions of his journey, like what if he made different choices during his Pokemon battles or when choosing which Pokemon to catch. Also, Misty is quite popular. Her feisty personality and her love for water - type Pokemon make her a great character for fanfic writers to explore different storylines with, such as her own solo adventures or her relationships with other characters.
The Legendary Pokemon like Groudon and Kyogre are also popular characters in the fanfiction. Writers often create stories around their power, their history, and how they interact with the human characters. For instance, a story could be about a trainer who has to prevent Groudon and Kyogre from clashing again and destroying the Hoenn region.
Blue is also quite popular. In fanfiction, his rivalry with Red can be intensified or even given a new twist. Maybe they have to team up against a greater threat, which makes for some really engaging character dynamics as they put aside their differences.
Gary Oak is often a popular character in fanfiction related to this. In the 'pokemon red and ash' fanfiction, he can be portrayed as a rival to Ash in new and different ways. Maybe he has a different motivation or goal in the fan - created storylines. Misty and Brock are also popular as they are Ash's long - time companions, and their relationships with Ash can be explored further in these fanfictions.
Red is often a very popular character. He's the main protagonist in the original games, and in fanfiction, he can be portrayed in many different ways, like a more experienced and powerful trainer or one who has to overcome new challenges. Another popular character is Leaf. Since she's not as well - known in the main games as Red, fanfiction gives a chance to explore her character more deeply.
Brock is often a popular supporting character. In the original Pokemon Red and Yellow, he's part of the main group, and in fanfics, he can play various roles. He might be the one with all the knowledge about Pokemon types and training tips. Another popular one could be Pikachu. Even though it's the protagonist's main Pokemon, it can have interactions with Misty that are interesting to read. And sometimes, the other Gym Leaders from the games make appearances as supporting characters, like Lt. Surge or Erika.
Snorlax is often a popular character in Pokemon Sumo fanfic. Its large size gives it an obvious advantage in sumo - style battles. Another one could be Machamp with its four strong arms. It can use its strength and multiple limbs to outmaneuver opponents.
Ash himself is of course very popular as the main character. His determination and love for Pokemon are central to many fanfics.