One possible scenario in this fanfiction could be Ash using his unique battle strategies in the Battle Frontier. Since he's a 'brain' here, he might outwit his opponents with complex plans. For example, he could analyze his opponents' Pokémon teams in great detail before the battle, predicting their moves and formulating counter - strategies on the fly.
One great Pokemon Ash Battle Frontier fanfiction is 'Ash's True Potential at the Battle Frontier'. It really shows Ash evolving as a trainer in unique ways during his Battle Frontier challenges.
Since I'm not sure which 'slow frontier light novel' you specifically refer to, it's hard to say. But generally, 'frontier' in a title might suggest themes related to exploration, new beginnings, or the challenges of living in a less - developed or uncharted area. 'Slow' could imply a more relaxed pace of the story, perhaps focusing on character development over rapid plot progression.
One interesting plot could be Ash facing a new and extremely powerful opponent in the Battle Frontier. This opponent might have a unique battle style that challenges Ash in ways he has never been before.
Ash is obviously one of the most popular. He's the main character and his journey through the Battle Frontier is what the fanfiction often revolves around.
One exciting plot could be Ash facing a new and powerful trainer at the Battle Frontier. This trainer has a unique set of Pokémon that Ash has never encountered before. It would be a tough battle, testing Ash's skills and strategies.
The plot could revolve around Ash being recognized for his strategic mind in the Battle Frontier. He could be challenged by various tough opponents who want to test his skills. Each battle would be a test of his wits, and he'd have to constantly adapt his strategies.
Obviously, Ash would be one of the main characters. His Pokémon are also likely to play important roles as they are an integral part of his journey. There could also be some new characters that he meets during the Battle Frontier, like trainers who have different training styles that inspire him to change and mature.
Well, it could be about Ash growing up, both in terms of his skills and his personality. Maybe he faces some tough challenges in the Battle Frontier that force him to become more mature, like learning from his losses and becoming a better strategist.