The plot might involve Ash dressing as a girl due to a bet or a dare. In the Sun and Moon setting, he then has to go about his daily Pokémon - related activities like catching new Pokémon and battling, all while looking like a girl. This could lead to some humorous situations, like other trainers underestimating him. As the story progresses, he could prove that appearance doesn't matter when it comes to Pokémon training.
One possible fanfiction could be where Ash has to dress as a girl for a mission in the Alola region (Sun and Moon setting). Maybe he needs to infiltrate a group that only allows girls. He would struggle at first with the new appearance but gradually get used to it and use his skills to complete the task.
In many such fanfictions, the plot might involve Ash's friends suddenly turning against him due to some false accusations or misunderstandings. For example, they could believe that Ash has been secretly working with an enemy group, which leads to his betrayal.
A fanfiction could focus on Ash Greninja's unique form and abilities. For example, it could tell a story where Ash has to rely on Greninja's special skills to overcome a powerful, mysterious Pokemon in the Alola region. This would show the significance of their partnership in the context of Pokemon Sun and Moon.
One common theme is friendship. Ash forms strong bonds with his friends in the Alola region, just like in the series. For example, his relationship with his classmates is often explored more deeply in fanfics.
One great Ash and Serena fanfiction in the Pokemon Sun and Moon setting is 'A New Adventure Together'. It has a really engaging plot where Ash and Serena meet up again in the Alola region and go on a journey to discover new Pokemon. The author does a wonderful job of capturing their characters and the unique charm of the Alola region.
One possible fanfiction could be about Ash and Lillie's adventure in the Alola region. Maybe they team up to face a powerful new Pokemon that has been causing trouble. They use their combined skills and the unique bond they've developed throughout their journey in Pokemon Sun and Moon.
One possible fanfiction could be where Ash is forced to dress as a girl for a disguise in a Pokemon contest. In this story, his Pokemon have some really funny reactions to his new look.
One interesting plot idea could be Ash and Lillie going on a special mission together to find a rare and powerful Pokemon that has the ability to heal other Pokemon. They face many challenges along the way, like rough terrains and other trainers who also want to capture this Pokemon. Another could be a story where Lillie gets lost in an unknown part of the Alola region and Ash has to use all his skills and knowledge to find her. During this time, he discovers more about Lillie's past and the secrets she has been hiding.
In some fanfictions, Ash Greninja's moment of saving Ash from a dangerous fall during a battle in the Alola region is really cool. It shows their loyalty and quick reflexes.
Ash is the central character for sure. Then there could be some new characters created specifically for the fanfiction. They might be the ones who instigate the betrayal. For example, a mysterious trainer who has a grudge against Ash. His friends in the Alola region play a big role too. They are the ones whose reactions to the so - called betrayal by Ash form a major part of the story. Pikachu, as Ash's most loyal pokemon, is also a key character as it has to deal with the situation where Ash is being betrayed.