Hau might be his toughest rival. Hau has a friendly rivalry with Ash throughout the Alola journey. He's also quite skilled and has some unique Pokémon that could give Ash a hard time in the championship battle.
Often, the moment when Ash is about to be declared champion is really exciting in fanfictions. The tension in the stadium is palpable. His friends are on the edge of their seats, and his Pokémon are all by his side. There's also the moment when Ash overcomes a seemingly impossible situation. For example, when his Pokémon are all weakened, but he manages to turn the battle around with some quick thinking and a last - minute strategy. It shows his growth as a trainer and is always a great moment in these stories.
One aspect to consider in 'Ash, Champion of Alola' fanfiction is Ash's character growth. He has come a long way from his early days in the Pokémon journey. In this Alola setting, he has to adapt to new Pokémon, new training styles, and new friends. His victory as champion is not just about battles but also about his personal development and how he has influenced the Alola region. For example, his unique bond with his Pokémon in Alola might be different from his previous regions, which can be a great focus in fanfictions.
In many fanfictions, Ash becomes champion of Alola through his unwavering determination. He has spent so much time traveling, learning about different Pokémon, and growing as a trainer. His bond with his Pokémon, like Pikachu, is a major factor. In fanfic stories, this bond might be even more emphasized, allowing them to overcome tough opponents together. Also, his experiences in Alola, learning about the unique Z - moves and the local Pokémon, give him an edge. He might use his knowledge of different battle styles he has picked up throughout his travels to outwit his opponents in the championship battles.
A great fanfiction idea could be Ash having to defend his championship title against a mysterious trainer from another region. This trainer has a unique set of Pokémon and a very different battle style from what Ash is used to in Alola. It would test Ash's skills and his ability to adapt as a champion.
Overcoming challenges is also a major theme. There are always tough opponents and difficult situations in these fics. Ash has to find ways to defeat powerful trainers and deal with various problems that come his way. This shows his perseverance and determination to achieve the champion status.
There are quite a few potential rivals. For example, Paul could be one. He has his own unique battling style and might be intrigued by Ash's Alola - champion ways. Then there's Trip. He could see Ash as a target to boost his own reputation. And in Alola itself, some of the more ambitious students from the Pokémon school who are aiming to be the best might also become rivals, constantly challenging Ash to prove they are worthy.
One great 'Pokemon Ash Alola Champion' fanfiction is 'The Alola Ascent'. It beautifully details Ash's journey to becoming champion in Alola, with unique character developments and exciting battles. Another is 'Ash's Alola Legacy' which focuses on how he changes the perception of being a champion in the Alola region. There are also many on fanfiction.net that you can explore.
A fellow trainer in Alola could betray Ash. This trainer might be envious of Ash's success as a champion. He could secretly work with Team Skull or some other antagonists to undermine Ash. For instance, he might give false information to Ash about a battle location, leading Ash into a trap.
Well, perhaps there could be a plot twist where the rules of the championship are suddenly changed right before the final match. Ash would then have to quickly adapt his battle strategy, which would show his growth and flexibility as a trainer.