Well, a cool plot might be that Sun and Lillie get separated from their friends during an unexpected storm while exploring an uncharted island. As they try to find their way back, they encounter a group of Pokemon that seem to be guarding a powerful and mysterious item. They must figure out how to communicate with these Pokemon to get the item and use it to signal for help. Also, perhaps there's a prophecy about them being together that they slowly uncover during their adventure.
A possible plot idea is that Lillie discovers she has a special power that only Sun can help her control. They then embark on a quest to find a wise old Pokemon trainer who can teach her how to master this power. Along the way, they face challenges from other trainers who are jealous of their relationship. And they also have to deal with Lillie's insecurities about her newfound power and how it might affect those around her.
One interesting plot idea could be that Sun and Lillie go on a journey to discover a new type of Pokemon that has been rumored to exist in a hidden part of Alola. Another could be that they have to team up to save Lillie's mother from some sort of dark force. Maybe they also find a time - traveling Pokemon that takes them back to the past of Alola, and they learn about the origin of some of the local traditions.
A simple plot could be that Sun and Lillie are on a quest to find a special Z - Crystal. They face many obstacles along the way, such as difficult terrain and other trainers. Their relationship develops as they support each other through these challenges.
One interesting plot idea could be a story where Gladion and Lillie have to team up to rescue a rare and endangered Pokemon. They might face various challenges along the way, like dealing with Team Skull. Another idea is a time - travel plot where they go back in time to learn more about their family's past and how it relates to the Pokemon world. Or perhaps a story where they are separated in a different dimension and have to find their way back to each other while making new Pokemon friends and allies.
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 possible fanfiction could be about Sun and Lillie going on an adventure together in the Alola region. They might discover a new and rare Pokemon that only appears during a certain lunar phase. Sun could use his skills as a trainer to protect Lillie from any potential danger, and in the process, their relationship could grow deeper.
One idea could be a story where Lillie discovers a hidden power within herself during an adventure with the protagonist in Pokemon Sun. Maybe she can communicate with a rare and powerful Pokemon that no one else can. This could lead to a series of events where they have to protect this Pokemon from an evil organization.
A fanfiction could start with Lillie having a strange dream about a legendary Pokemon. Ash believes her dream could be a sign. So they set out on a quest to find this legendary Pokemon. Along the journey, they meet different characters from the Alola region who give them clues. Their bond deepens as they face difficulties together and eventually find the legendary Pokemon, which turns out to have a special connection to Lillie.
A fanfiction could be about Lillie's attempts to create a new form of Pokemon battle. She might be inspired by the unique environment of Alola and come up with a battle style that combines elements of the local culture. This could attract the attention of other trainers and even lead to a new Pokemon tournament being created in Alola.
One interesting aspect could be the unique interpretations of the characters. In fanfictions, authors often give Lillie more in - depth backstories or different personality traits compared to the original game. For example, they might explore her relationship with the Pokemon in a more emotional way, showing how she bonds with them on a deeper level.
One idea could be a story about a trainer who discovers a rare and powerful Pokemon that was thought to be extinct in the Alola region. This Pokemon could have unique abilities that attract the attention of both good and bad characters in the fanfiction.
Well, in this fanfiction, Lillie's return often brings new adventures. Maybe she comes back with new Pokemon skills or knowledge. It could also lead to reunions with old friends in the Pokemon Sun and Moon universe.