Maybe a new, mysterious villain who has a grudge against Ash or wants to use his skills for their own evil purposes. This villain might be from a far - off region and has special powers that allow them to hypnotize people. They see Ash as a useful tool to carry out their plans in the Pokémon world.
One possible plot could be that a villain uses hypnosis on Ash Ketchum to make him do their bidding in Pokémon battles. So instead of using his own strategies, he's forced to follow the commands of the hypnotist. This would create a lot of chaos and challenges for his friends as they try to figure out what's wrong with Ash and how to break the hypnosis.
One possible fanfiction could involve Team Rocket using a new device to hypnotize Ash Ketchum. They might make him do silly things like singing a Pokémon theme song in a really strange voice or making Pikachu do a little dance. But of course, his friends would eventually figure out what's going on and try to break the hypnosis.
One common plot could be that Ash gets hypnotized by a mysterious Pokémon trainer who wants to use his skills for their own gain. For example, they might want to win a big tournament using Ash's battle knowledge. Another plot could involve Ash being hypnotized and made to forget his friends, Pikachu included, and then his friends have to find a way to break the hypnosis. It could also be that a villain hypnotizes Ash to make him steal Pokémon for them.
One possible fanfiction could be where a powerful Pokémon trainer with psychic abilities hypnotizes Ash Ketchum. In this story, the trainer might have an evil plan to use Ash to steal rare Pokémon. Ash, under the hypnosis, starts to obey commands against his will. However, his Pikachu senses something is wrong and tries to break the hypnosis by using its electric shocks on Ash at just the right moment. Eventually, Ash breaks free and battles the evil trainer.
The plot could be that an unknown villain hypnotizes Ash. The villain wants to use Ash's skills and reputation to steal Pokémon. Ash, under hypnosis, starts to lead other trainers into traps. His friends are confused at first but then realize he's not himself. They search for a way to reverse the hypnosis, perhaps by finding a rare Pokémon or a special item.
Well, if Ash was hypnotized to obey commands in fanfiction, it might change the whole dynamic of his adventures. For example, Team Rocket could get hold of the hypnosis method and try to make Ash work for them. But Ash being Ash, even under hypnosis, his love for Pokémon might break through the commands and he could end up turning the situation around on Team Rocket.
His rival, Gary, could be a likely candidate. Gary has always been competitive with Ash, and in this fanfiction, his jealousy could reach a boiling point, causing him to betray Ash for his own gain, like trying to steal his Pokémon or get credit for his achievements.
Ash could become more confident and wise as a Dragon Master. His decision - making skills would improve as he deals with powerful and often unpredictable dragon Pokémon.
Fanfiction can also take a more comical approach. Picture Ash and Jessie accidentally swapping bodies or getting stuck in a Pokemon's body. This would lead to all sorts of hilarious misunderstandings and attempts to get back to normal. It would be a fun and light - hearted way to explore their characters in a different context.