One idea could be that Ash discovers a female Charizard that has been separated from its group. He decides to train it, but it has a very different personality from his regular Charizard. Maybe it's more stubborn and has unique battle techniques that Ash has to learn to work with.
A possible plot is that in a fanfiction world, there is a tournament specifically for female Pokémon. Ash enters his female Charizard into the tournament. Along the way, they meet various trainers with their own powerful female Pokémon. The story could focus on the training, the friendships Ash and his Charizard make, and the exciting battles in the tournament.
Perhaps there could be a plot where Charizard accidentally causes a wildfire in Alola. Ash then has to take responsibility and with the help of the local Pokémon and trainers, they work together to put out the fire and repair the damage. This would show the importance of environmental protection and how Ash and Charizard learn from their mistakes in a new region.
In a plot, Charizard could be injured in a fight against a group of rogue Pokemon. Charla, who has some special healing abilities, takes care of him. During his recovery, they get to know each other better. Charizard shows Charla his gentle side, and Charla shows her strong and determined nature. This mutual understanding leads to love. They then go on a journey to find a rare item that can enhance Charizard's powers, all while strengthening their relationship.
One possible plot could be that Ash's Charizard is revealed to be female in a special way. Then, as they journey together, they develop a deeper bond that goes beyond the typical trainer - Pokemon relationship. Maybe there are some challenges they face where the female Charizard's unique abilities or personality traits play a crucial role in helping Ash and his friends.
One interesting plot could be that Charizard's mega evolution causes it to lose some of its memories. Ash then has to go on a journey to help Charizard regain those memories while also dealing with the challenges that come with having a mega - evolved Pokémon. For example, other trainers might be jealous and try to challenge Ash more often. Also, Charizard's new power might attract the attention of powerful Pokémon that want to test their strength against it.
One idea could be that Ash discovers a female Mewtwo in a hidden part of a forest. She's initially scared of humans but Ash manages to communicate with her using his bond with Pokemon. They go on a journey together to find a place where she can live in peace, away from those who might want to use her powers.
Maybe in the fanfiction, Elesa's Pokemon get lost in an unknown region and Ash offers to help her find them. During their search, they encounter rare and powerful Pokemon, and they also discover a hidden mystery about the region that they are in. This adventure could strengthen their friendship and respect for each other.
A possible plot is that Ash is separated from his friends during a powerful storm. Alone, he stumbles upon an ancient Pokemon ruin. He then has to decipher the secrets within the ruin with the help of his Pokemon, all while trying to reunite with his friends. He might learn some long - forgotten Pokemon training techniques in the process.
One idea could be that Ash mentors a young trainer who is afraid of Pokemon battles. Ash uses his own experiences to show the kid how to overcome fear and build a bond with their Pokemon. For example, he might share how he was once scared of facing strong opponents like Brock in his early days but learned to trust in Pikachu's abilities.
A possible plot for a Pokemon Ash and Arceus fanfiction could be that Ash is summoned by Arceus to a sacred place. There, Arceus reveals that Ash has been chosen to help balance the powers of all the different types of Pokemon in the world. This would involve Ash traveling to different regions and facing challenges related to each type of Pokemon. For example, in a region dominated by fire - type Pokemon, he might have to find a way to cool things down without harming the Pokemon. Another plot could be that Ash accidentally angers Arceus, and as a punishment, he has to go on a journey to prove his worth and respect for all Pokemon. He has to complete tasks like helping a group of endangered Pokemon species thrive again. And, a third plot idea is that Arceus gives Ash the ability to transform into different Pokemon forms for a short time to better understand them, and Ash uses this power to solve various problems in the Pokemon world.
One plot idea could be that Ash and Giselle team up to explore a new, mysterious region filled with never - before - seen Pokemon. They encounter various challenges along the way, like difficult terrains and strong wild Pokemon. Another idea is that Giselle has a special ability that only Ash can help her control, and together they use it to save a Pokemon sanctuary from an evil organization. A third idea might be that Ash gets lost in a time - warp and Giselle has to follow him into the past or future to bring him back, all while facing different versions of Pokemon from different eras.