In Pokemon Sun and Moon pregnant fanfiction, a common theme could be the relationship between the pregnant character and their partner. If it's a trainer couple, they might face challenges in their journey together due to the pregnancy. Maybe one has to stay back to take care of the other while still trying to complete their Pokemon research or battles. Also, there could be a story about a pregnant character's interaction with other trainers. Some might be helpful and offer advice, while others could be jealous or competitive in a different way because of the new situation.
One interesting idea could be exploring how a Pokemon trainer's pregnancy affects their journey. For example, they might have to take breaks more often, and their Pokemon might become more protective. Another idea could be the discovery of a new Pokemon species that has a special connection to pregnancy, like a Pokemon that can sense and ease the discomfort of a pregnant trainer. And also, perhaps a plot where a female Pokemon is pregnant and the trainer has to help it through the process, which could involve finding special items or places for a safe delivery.
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.
You could write a fanfic where the main character is a Pokemon ranger in the Alola region. They are tasked with protecting a special area that is home to a group of endangered Pokemon. Along the way, they meet various trainers and have to deal with poachers trying to capture these precious Pokemon.
You could write a fanfic about a group of friends who all start their Pokemon journey in Alola at the same time. Each of them has a different goal and Pokemon type preference. As they progress through their journey, they face various challenges together and sometimes separately. Their relationships are tested and strengthened as they deal with difficult situations like facing off against powerful wild Pokemon or rival trainers.
One idea could be a trainer from the Sun region traveling to the Moon region and having to adapt to the different Pokemon species and cultural differences there. For example, they might be shocked by the unique Z - Moves in the Moon region. Another could be a group of Pokemon from both regions coming together to stop an evil force that threatens both their lands. Maybe a dark organization is trying to capture rare Pokemon from both areas for their own sinister purposes.
One idea could be that Naruto and his friends are transported to the Alola region in the Pokemon Sun and Moon world. There, they discover new Pokemon and learn about the unique Z - Moves. Naruto might befriend a Rowlet because of its small and cute appearance but also its determination, much like himself. He could train with it and enter Pokemon battles using his ninja skills to strategize.
One idea could be Guzma's backstory exploration. Maybe he had a difficult childhood that led him to form Team Skull. Another plot could involve a friendship between Guzma and a new trainer in Alola. They start off as rivals but gradually become friends and learn from each other.
Well, perhaps Serena could get involved in a mystery regarding a rare and powerful Pokemon in Sun and Moon. She could team up with some local trainers to solve it. Maybe there's a hidden cave where this Pokemon is rumored to be, and along the way, she discovers new forms of Pokemon she's never seen before. This would add an element of adventure to the fanfiction.
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.
One idea could be an OC who is a trainer from a far - off region coming to Alola. They could have a unique Pokemon not native to Alola and struggle to adapt to the new battle styles and cultures. For example, their Pokemon might be used to colder climates and have trouble with the heat in Alola.
One idea could be that Greninja returns with a new power that it gained during its time away. It could use this power to help Ash in a crucial battle in the Alola region. For example, it might have learned to control water in a more unique way, like creating ice sculptures that can attack opponents.