There's also 'Ash's Alola Bonds in Sun and Moon Fanfic'. This fanfiction delves deep into the relationships Ash forms with his friends and Pokemon in the Alola region, making for a heartwarming read.
One interesting story could be Ash having a unique adventure in Alola that's different from the main series. Maybe he discovers a new type of Pokémon or a hidden power within his existing Pokémon.
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 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.
One interesting fanfiction could be about Ash's adventures in the Alola region where he discovers a rare and powerful Pokemon that isn't in the main series. It could show his journey to train it and how it changes his relationship with his other Pokemon.
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.
One interesting part is seeing Ash adapt to the Alola region's laid - back lifestyle while still being a determined trainer. It's a contrast that adds depth to his character.
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.