It could have a huge impact. His Pokémon journey might take some strange turns. He could be sent on quests by the hypnotist that have nothing to do with his original goals. His Pokémon might have to adapt to following these new, strange commands from Ash who is under hypnosis.
If Ash was hypnotized to obey commands during his Pokémon journey in fanfiction, his relationships with his Pokémon could be strained. They are used to Ash making decisions based on his own free will and judgment. Now, if he's following commands that might not be in their best interest, it could lead to some conflicts. For instance, if he's commanded to enter a dangerous area where his Pokémon don't think it's safe, they might resist his orders.
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 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.
It would change it a great deal. He'd be able to protect his Pokémon better. For instance, if they were in danger from a powerful enemy, he could use the Force to shield them.
One common theme is the struggle between the hypnotized Ash and his true self. His friends often play a crucial role in trying to break the hypnosis and bring him back to normal. Another theme could be the power struggle between the one who hypnotizes Ash and those who want to free him.
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.
Pikachu would probably be very curious. It might zap the lightsaber a bit to see what would happen, and then be in awe of the bright blade. It could also get a bit protective of Ash when he wields the lightsaber, as if it senses the added danger.
They could impact it by introducing new training methods. For instance, if the OC had knowledge of modern sports training techniques, they could apply some of those concepts to Pokémon training. This might lead to Pokémon evolving faster or developing new moves. The Pokémon battles in the world would become more exciting and unpredictable as a result.
Well, the concept of Ash having to obey is interesting because it can completely change the dynamics of his relationships. His Pokémon, his friends, and his rivals will all interact with him differently. It also allows the author to explore different plotlines and scenarios that wouldn't be possible in the normal Pokémon storyline where Ash is more independent.
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.
Well, this type of fanfiction concept often delves into the realm of the psychological. The idea of mind control over Ash Ketchum can be seen as a way to play with power dynamics. If a villain is the one controlling him, it gives the villain an upper hand in a different way compared to just physical strength. And it forces the fanfiction writer to think about how the Pokémon world's rules and magic could be bent or used in relation to hypnosis. Also, it can open up opportunities for exploring different moral and ethical questions within the story, like whether it's right to use mind control, and how far his friends should go to free him.