Well, perhaps in the 'ash vs alain rematch fanfic', the setting is a grand Pokemon tournament. Alain is the defending champion, and Ash is determined to take the title. The fanfic could focus on the mind games between them before the battle. During the rematch, Alain's other Pokemon like Metagross give Ash a tough time, but Ash's Greninja makes a comeback. And it could end with a draw, leading to a future rematch.
Ash and Alain are the main characters. Ash, the protagonist from the Pokemon anime series, has a wide variety of Pokemon friends. He has a lot of experience and is always eager to learn and grow. Alain, a skilled trainer, has his own set of powerful Pokemon. In the fanfic, they are pitted against each other again, and their personalities, skills, and the relationship between them would be explored in detail during the rematch.
The main characters are clearly Ash and Tobias. Ash is the well - known Pokémon trainer who has been on many adventures and has a deep bond with his Pokémon. Tobias is his opponent, a very strong trainer who has given Ash a tough time in the past.
Well, it could involve Ash using his new Pokémon strategies that he has developed since their last encounter. Maybe he has some rare Pokémon now that he didn't have before. Tobias, on the other hand, might have also upped his game. The rematch could be set in a grand stadium, with lots of fans cheering for Ash, hoping he can finally defeat Tobias who was such a tough opponent last time.
One possible fanfic could be about Goku's intense training before the Cell Games. He might be shown pushing his limits in the Hyperbolic Time Chamber, trying out new techniques and forms to defeat Cell. Maybe he discovers a new power level that no one, including himself, expected.
It could be someone from Goku's past who has a vendetta against him and takes advantage of the chaos during the Cell Games. For instance, an old enemy who was thought to be defeated but managed to come back stronger and wants to finish Goku off while he's weakened from the fight with Cell.
One common theme is the clash of ideologies. Goku is all about protecting the innocent and having a fair fight, while Cell is more about self - preservation and domination at first.
Perhaps a rogue Saiyan from another part of the universe. This Saiyan has heard about the Super Saiyan powers on Earth and wants to prove his superiority. He shows up at the Cell Games and challenges Goku and Gohan. He has a different fighting style, more brutal and less honorable than the Saiyans on Earth. His presence adds a new layer of conflict as Goku and Gohan have to decide whether to fight him on his terms or uphold their own values.
One possible plot could be a story where Goku meets a female version of Cell who has different motives than the original Cell. Maybe she doesn't want to destroy the Earth but instead is on a journey of self - discovery. Goku, being the protector, is initially cautious but then starts to see her potential for good.