One idea could be exploring an alternate universe where Red and Blue team up from the start to face a greater threat, like a new super - powerful legendary Pokemon. Another could be a story focused on their friendship growing during their journey, with them sharing tips and strategies that they don't in the original games. A third idea might be a fanfic where they have to deal with a strange phenomenon that's affecting the Pokemon in Kanto, like a mysterious illness that only they can solve.
A good plot idea for a Pokemon Trainer Red and Blue fanfic could be a time - travel story. Maybe Red or Blue accidentally travels back in time to before they started their Pokemon journey. They could use their knowledge of Pokemon and battles to change some events, but also risk changing the future in unexpected ways. Another idea is a story where they compete in a secret, high - stakes Pokemon tournament that's not part of the official game storyline. This tournament could have unique rules and attract trainers from all over the world. Also, a fanfic could center around Red and Blue getting lost in an unknown region filled with new and strange Pokemon species, and they have to find their way back while also documenting these new Pokemon.
Well, a great plot idea might be that Red and Ash find a mysterious Pokemon that has powers neither of them have ever seen. They have to work together to figure out how to care for it and also protect it from an evil organization that wants to use its power for bad. Maybe they also learn some new training techniques from each other along the way.
For a 'pokemon red and blue fanfic', you could write a story about a group of Pokemon that have formed their own little society in a hidden part of the Kanto region. The main character stumbles upon this society and has to learn to co - exist with them. Another plot could be that a legendary Pokemon chooses a very inexperienced trainer from the 'pokemon red and blue' world as its partner, and together they have to overcome the doubts of other trainers. There could also be a fanfic where a powerful item from the games gets corrupted and starts causing chaos in the Kanto region, and the trainers have to find a way to fix it.
Another plot could involve Red and Green traveling to a previously unexplored area in the Pokemon world. Along the way, they discover new Pokemon species and encounter challenges that test not only their battling skills but also their friendship. Maybe they get separated at some point and have to find their way back to each other while dealing with various obstacles.
One idea could be a trainer who discovers a rare and powerful pokemon that has unique abilities not seen before. This pokemon could be a key to solving a mystery in the pokemon world, like a strange disappearance of other pokemon in a certain area. The trainer and the pokemon then form a special bond as they work together to uncover the truth.
The main characters are usually Red and Blue. Red is often depicted as the more quiet and determined trainer, while Blue is more outspoken and competitive. Sometimes, their Pokemon also play important roles as secondary characters, like Red's Pikachu or Blue's Eevee (if you choose to give them those particular Pokemon).
One idea could be exploring an alternate timeline where Red and Blue have different starter Pokemon. Maybe Red starts with Squirtle instead of Charmander, which would change the dynamics of his battles and relationships with other trainers.
One plot idea could be a girl trainer in the Pokemon Red and Blue world who discovers a rare and powerful Pokemon that no one has ever seen before. She has to protect it from evil teams who want to use it for their own gain.
One idea could be a trainer who starts with a weak and overlooked Pokemon but through unique training methods makes it extremely powerful. For example, a trainer with a Magikarp that he trains to be a fearsome Gyarados in a way no one has seen before.
One idea could be a story where a unique Pokemon only found in the Red version teams up with a trainer from the Blue version to face a new, powerful threat. Another could be a story about a trainer who discovers a secret connection between the Red and Blue Pokedex that leads to an adventure.
One idea could be a story where the main character is a Pokemon trainer who discovers a rare and powerful Pokemon that no one has ever seen before. They then have to protect it from evil organizations who want to use it for their own gain.