Well, in fanfiction, when Meowth joins Ash, it might change the whole story arc. Meowth could bring his knowledge of Team Rocket's plans and technology. This could help Ash prevent other villains from stealing Pokémon. Also, their friendship could be really heartwarming. Meowth might start to see Ash as a true friend, not just an enemy like he did when he was with Team Rocket. And together, they could meet new Pokémon and trainers, creating a whole new Pokémon world in the fanfiction.
If Meowth joins Ash in fanfiction, it could lead to some really interesting character dynamics. Meowth has been part of Team Rocket for a long time, so there would be a lot of room for him to change and grow. He could teach Ash some of the sneaky tricks he learned from Team Rocket, but in a more positive way. Maybe they'd form a new team and compete in different Pokémon competitions.
Meowth joining Ash in a fanfiction could also lead to some interesting character development for both. Ash might learn more about the Pokémon world from Meowth's perspective, especially the seedy side that Meowth has been a part of with Team Rocket. And Meowth could learn about friendship and loyalty in a new way, different from what he's experienced with Jessie and James.
In this fanfic, the plot could be that Meowth has a change of heart after an encounter with a powerful and kind Pokémon that Ash helps. This makes Meowth realize that Ash's way of treating Pokémon is better. So, he joins Ash. He could then use his unique skills, like his ability to talk, to help Ash in battles and communicate with other Pokémon more effectively.
One possible storyline could be that Meowth helps Ash find a rare Pokémon. Since Meowth has his own network among Pokémon, he might hear rumors about a very special Pokémon. He then takes Ash to the location, and they have an epic adventure trying to catch it. Another storyline could be that Meowth and Ash team up to take down a new evil organization that's causing trouble in the Pokémon world.
Well, Mewtwo is an extremely powerful Pokémon. If it joins Ash, they could become an unbeatable team. Mewtwo's psychic powers could help Ash in battles, for example, predicting the opponents' moves or directly influencing their Pokémon's actions. It might also bring a new dynamic to Ash's group, as Mewtwo has a complex personality due to its origin as a genetically - engineered Pokémon. Ash, with his kind heart, could help Mewtwo further understand emotions and the value of friendship.
He might face some tough battles right away. The Elite Four are known for their strong Pokémon and strategic skills. Ash would have to quickly adapt to their level of play.
The storyline would likely become more complex. With Meowth around, there would be a new dynamic. His loyalty would be split between Ash and his old Team Rocket pals at first. This internal conflict could drive parts of the story.
Well, if Ash joined Team Rocket, he'd probably bring a whole new dynamic. His skills as a trainer could be used in unexpected ways. Maybe he'd try to reform Team Rocket from the inside, using his kind heart and love for Pokémon to change their ways. He could also introduce new strategies for capturing Pokémon that are more ethical than Team Rocket's usual methods.
Another thing that could occur is that Ash's friends would be very suspicious. They might think Ash has gone to the dark side. So they could try to rescue him. This would lead to a lot of drama and action. There could be epic battles between Ash's friends and Team Flare while Ash is caught in the middle, trying to figure out what to do and where his loyalties truly lie.
One possibility is that Ash brings his unique battle skills to Team Skull. He might start teaching the members new strategies, which could change the whole dynamic of the team. For example, his bond with his Pokémon could inspire the Team Skull members to form stronger relationships with their own Pokémon.
Well, in such a fanfiction, Ash might start using Team Rocket's sneaky tactics. He could learn from them how to be more devious in catching Pokémon. For example, he might use their elaborate traps instead of his usual straightforward battles. This would be a huge change from his normal good - guy image.