There could also be a mysterious trainer who appears from time to time. This trainer has a very powerful and rare Pokemon that Troy is intrigued by. Their battles would be intense as Troy tries to figure out the mystery trainer's strategies.
Another potential rival could be a young prodigy named Lily. She has a diverse team of Pokemon that she has trained from a very young age. Lily is very confident in her abilities and constantly tries to outdo Phoebe in battles. She might also have some unique training methods that Phoebe has to figure out in order to defeat her.
A rich and spoiled trainer who has access to all the latest Pokemon gear and rare Pokemon could be a rival. This person might look down on Cameron at first but later realizes Cameron's true strength. There could be a lot of tension and competition between them.
One potential rival could be a male trainer who has a more traditional view of Pokémon training and looks down on the fem Ash's different approach. He might constantly try to one - up her in battles.
Gary could be one of his rivals. Gary has always been competitive with Ash. Another potential rival could be a new character introduced in the fanfiction, someone who is really good at Pokemon battles and wants to prove himself better than Ash.
Gladion could be a great rival for Serena. He has a very different approach to training and battling compared to her. His edgy style and his strong Pokemon like Silvally would pose a real challenge to Serena.
Perhaps he defeats some of the Elite Four members who are participating in the league. They are known for their strength, so it would be a huge accomplishment. And of course, any recurring rivals from his past adventures like Trip or Paul.
A self - proclaimed 'collector' of rare pokemon could be a rival. This person has a huge collection of non - shiny but very rare pokemon and sees Ash's shiny pokemon as the ultimate addition to their collection. They would stop at nothing to get their hands on at least one of Ash's shiny pokemon. And of course, there could be other trainers who simply can't stand the fact that Ash has such an amazing ability and they don't.
There could be some new rivals as well. Maybe there's a young, up - and - coming trainer who has heard a lot about Ash and wants to make a name for himself by defeating the new Frontier Brain Ash. Also, an old acquaintance from one of his previous travels who has also developed into a strong trainer could emerge as a rival. They might have different views on Pokémon training, which would lead to intense battles.
The following are some recommendations for entertainment novels about their sworn enemies:
1. "I Kissed My Opponent [Entertainment Circle]": It told the story of two rivals in a competitive reality show.
2. "Rebirth and Enemies in the Entertainment Industry" described the sweet story of the protagonist and his arch-enemy after his rebirth.
3. "I'm Reborn After Being Confessed by My Opponent [Entertainment Industry]": It was a sweet story about the protagonist and his rival after his rebirth.
4. "My rival insists on dating me [Entertainment Industry]": In the story, my rival insists on dating the protagonist.
5. [The Cat That Became an Enemy (Entertainment Industry)]: The protagonist became the cat that became an enemy, and a series of interesting stories happened.
Please note that the novels recommended above are based on the search results provided. There may be other related novels that are not included.