A plot could involve a human accidentally stumbling into the hidden realm of Legendary Pokemon. There, they have to prove themselves worthy to the Pokemon and in the process, they develop a unique friendship. The human then uses this new - found relationship to bring peace between humans and Legendary Pokemon who have long been in conflict due to misunderstandings.
Perhaps a human has a special ability that allows them to communicate with Legendary Pokemon. They are then tasked with helping a Legendary Pokemon regain its lost power. Along the way, they face challenges from other Pokemon and humans who don't understand their mission. This journey of discovery and friendship can be really exciting in a fanfiction.
Another plot could be that the human has a special ability that allows them to enter the dreams of pokemon. In these dreams, they learn about the pokemon's past, their hopes, and fears. This knowledge helps the human to better understand pokemon in general and they use this understanding to improve the relationship between humans and pokemon in their world. Maybe they even discover a conspiracy that is affecting the pokemon in their sleep, and they have to stop it.
Maybe a story about a human who accidentally stumbles into the hidden realm of Legendary Pokemon. There, they form a friendship with a Legendary that is an outcast among its kind. Together, they try to change the perception of the outcast Legendary in its own community while also finding a way for the human to return home.
One idea could be a story where a human trainer forms a deep bond with a female Pikachu. They go on adventures together, facing challenges that test their relationship. The Pikachu might have unique abilities that help the human in battles.
One idea could be the human having unique abilities because of being raised by Pokémon. For example, they might be able to communicate with Pokémon in a special way that normal humans can't. Another could be the human facing challenges in the Pokémon world that are different from those in the human world, like dealing with Pokémon rivalries and trying to keep the peace among different Pokémon species.
One idea could be that the human has special powers that are unique even among the Pokémon. For example, the ability to communicate telepathically with all Pokémon types. Another could be that the human is on a quest to find a way back home while forming deep bonds with the Pokémon in the pack. Maybe the human discovers a hidden power within the pack that could change the Pokémon world forever.
One idea could be a world where humans and pokemon have to compete in a series of challenges for the right to co - exist in a new territory. Another could be a story where a human with special powers is pitted against a powerful pokemon in a battle of wits and strength. Maybe a pokemon trainer who loses their memory and has to rely on the help of their pokemon to figure out who they are while also facing off against other humans who want to take advantage of their situation.
One idea could be Ash encountering a Legendary Pokemon that has lost its memory. Ash then tries to help it regain its memories while protecting it from poachers. Another could be a time - travel plot where Ash is sent back in time and has to team up with a Legendary Pokemon to prevent a great disaster from happening in the past that would change the future of the Pokemon world.
One interesting storyline could be a human with a special bond to a Legendary Pokemon. For example, a trainer who discovers they have an ancient connection to Mewtwo. They might go on a journey to understand this connection and in the process, face challenges from other trainers or organizations who want to use this connection for their own gain.
One idea could be a story where a human trainer has a special bond with a Pikachu that allows them to communicate telepathically. Another could be a human getting lost in the Pokemon world and having to team up with various Pokemon to find their way back home. Or perhaps a story about a human who discovers they have the power to transform into a Pokemon.
A human to pokemon fanfiction could focus on a human being transformed into a Pokemon. They would have to learn how to survive in the Pokemon world, using their human knowledge to their advantage while also adapting to their new form. For example, a human turned into a Pikachu might use their understanding of electricity from a scientific perspective to control their electric attacks better. This could create a really unique and exciting story as they navigate their new life and interact with other Pokemon.