A possible plot is that a human adopts a group of small, cute pokemon. The human lives in a big city and has to figure out how to keep the pokemon happy and healthy in an urban environment. There could be challenges like finding a place for the pokemon to exercise and play, and dealing with neighbors who might be scared or curious about the pokemon.
One interesting plot could be a human adopting a baby pokemon that was abandoned. The human has to learn how to take care of the pokemon's special needs, like its diet which might consist of certain berries or other pokemon - specific foods. They also need to protect the pokemon from other dangerous pokemon in the wild.
In some 'pokemon x human adoption fanfiction', there could be a plot where a human adopts a legendary pokemon in its weakened state. This would be very unique as legendary pokemon are usually very powerful and independent. The human and the pokemon then form a special bond that helps the pokemon regain its strength while the human gains a powerful friend and protector.
One interesting plot could be a powerful Pokemon like Arceus seeing a lonely human child and deciding to adopt them. It could then use its divine powers to protect the child from various threats in the Pokemon world. Another plot might involve a group of friendly Pokemon, like Pikachu and its pals, finding an abandoned human and taking it in, teaching the human how to live among Pokemon, like finding food sources that are safe for humans in the wild.
In some fanfictions, the human character has special abilities that are unique to humans. For example, they might be able to strategize in ways that Pokemon usually don't. So they lead a team of Pokemon through difficult dungeons, using their human - like thinking to solve puzzles and defeat powerful enemies.
Well, in some 'human turned into anthro pokemon fanfiction', there could be a plot where a human is transformed into an anthro Eevee. This Eevee - human now has to find a way to reverse the transformation. Along the way, they make friends with other Pokemon and learn about the complex social structure of the Pokemon world. They might face challenges like being hunted by a trainer who wants a rare anthro Pokemon.
There could be a plot where a human is cursed by an evil witch, and a good witch decides to help the human break the curse. Along the way, they form a deep bond. The human learns about the witch's world, and the witch learns about human emotions like love and friendship, which in the end, is the key to breaking the curse.
It often starts with the human showing kindness. For example, if the human finds an injured pokemon and takes it in to nurse it back to health. This initial act of care begins the bond. Then, as they spend more time together, they learn about each other's habits. The pokemon might learn human language and customs, while the human learns about the pokemon's abilities and needs.
In some fanfiction, the characters from Pokemon Red and Yellow might have their Pokemon swap abilities or forms due to a strange glitch in the Pokemon universe. This leads to a whole new set of adventures as they have to figure out how to control their Pokemon in these unexpected states. They might also encounter other trainers who are both intrigued and envious of their unique Pokemon situations.
One interesting plot could be Pikachu and Snivy teaming up to explore a mysterious new region in the Pokemon world. They encounter new Pokemon species and have to work together to overcome various obstacles like difficult terrains and powerful wild Pokemon.
One interesting plot could be the discovery of a new and rare Pokemon species that exists only in the regions of Green and Blue. This new Pokemon could hold the key to a great mystery. Another plot might involve a trainer from Green teaming up with a trainer from Blue to compete in a special tournament that has never been held before.
Another plot could involve time - travel. A device malfunction causes the world of Pokemon Red and the world of Pokemon Green to collide temporally. The trainers from both versions then have to find a way to restore the normal flow of time while also dealing with the chaos that ensues. Some Pokemon might evolve differently due to the altered time - space, and the trainers need to figure out how to handle these new forms.
A plot might involve a yandere legendary Pokemon like Mewtwo falling for the reader. Mewtwo could use its psychic powers to manipulate situations so that the reader has no choice but to be with it. It might create illusions to scare away potential rivals or even control the reader's thoughts to some extent.