One idea could be to focus on a new trainer's journey in the Galar region. They could start with a unique Pokemon not often chosen, like a Galarian Zigzagoon, and face various challenges that the game doesn't cover. Another could be a story about the backstory of a Gym Leader, perhaps their rise to power and the secrets they hold. Maybe a fanfic where Pokemon from different regions end up in Galar and how they interact with the local Pokemon and trainers.
Well, you could write a Pokemon Shield fanfic about a team of misfit Pokemon that form an unlikely bond. For example, a small group consisting of a Magikarp, a Zubat, and a Caterpie. They might be looked down upon by other Pokemon and trainers, but through their combined efforts and unique abilities, they prove themselves in battles and adventures. Or, it could be a fanfic centered around a Pokemon breeding center in Galar, exploring the relationships between the breeders and the Pokemon they care for.
One idea could be a story about a trainer who discovers a new, hidden ability in their Pokemon that changes the way battles are fought in the Galar region. For example, a Pikachu that can use a special electric move that is only possible in certain areas of the wild area.
A fanfiction could focus on the backstory of a Gym Leader in Pokemon Sword and Shield. Maybe they had a difficult past that led them to become a Gym Leader and how they overcame those challenges. It could also involve their relationship with their Pokemon.
A cool idea might be a fanfic where the shield can transform. It could start as a small, unassuming object but then grow and change shape depending on the situation and the amount of chakra it absorbs.
Well, you could write a fanfic where the Shield Hero gets transported to a different part of the world that has a completely different culture and set of rules. This would force him to adapt in new ways. You could also do a story where he teams up with an unexpected ally, someone who was initially his enemy. Maybe a character from the antagonist side realizes that they have a common goal and decides to join forces with the Shield Hero. And don't forget about a time - travel fanfic, where the Shield Hero goes back in time to change certain events that happened to him at the start.
One idea could be a fanfic where Miles has a secret power that he discovers while on a mission with the Agents of Shield. This power could be something that changes the dynamic of the team and how they operate.
You could write a fanfic where the Shield Hero has to deal with a curse that not only affects his physical abilities but also his mental state. This curse could be placed on him by an unknown enemy. The fanfic could then follow his struggle to break the curse while still fulfilling his duties as the Shield Hero. He might have to seek help from unlikely sources, like a group of outcasts who have knowledge of ancient magic.
One idea could be exploring an alternate timeline where the Shield Hero starts with different abilities. For example, instead of just the basic shield, he has a shield with hidden offensive powers.
One idea could be a fanfic where a trainer discovers a new and rare Pokemon species in an uncharted region. Another could be a story about a Pokemon that has unique abilities and how it changes the Pokemon battles in a particular area. Maybe a fanfic that focuses on the friendship between a trainer and a Pokemon that is usually considered difficult to train.
One idea could be a story where a new villain emerges who has the ability to manipulate time. The Agents of Shield and the Avengers have to work together to stop this villain before he changes history in a way that destroys the world. Another plot could involve an agent from Shield who discovers a long - lost relative who has superpowers and is being hunted by an evil organization. The agent has to protect their relative while also dealing with the implications of this newfound family member within the context of their work with Shield and the Avengers.
Another idea is that the Pokemon have some of the abilities of the TF2 characters. So, there could be a Pikachu with the Scout's double - jump ability. Or a Snorlax that has the Heavy's strength and can use a 'Mini - Gun' - like attack which is actually just a powerful Tackle. This would create really unique and interesting battles.