Well, the plot could involve Ash getting transported to the Power Rangers' world. Maybe he discovers he has some hidden Ranger - like powers. He could team up with the Rangers to fight against a common enemy that threatens both the Pokemon world and the Ranger world. For example, an evil villain who wants to capture Pokemon to use their powers for evil in the Ranger universe.
All of Ash's Pokemon could be seen as strange and new creatures in the Power Rangers' world. The Rangers would have to learn about each Pokemon's abilities and how to work with them. Ash could hold 'Pokemon training sessions' for the Rangers, teaching them how to command the Pokemon in battles. This would not only make the battles more diverse but also strengthen the bond between Ash and the Rangers as they all learn from each other.
One possible plot could be that Ash travels to a new and mysterious region. There, he discovers a rare type of Pokemon that has unique powers. He befriends this Pokemon and together they face challenges from a new evil team. Through their bond and his determination, Ash gradually overcomes all the obstacles and gets closer to becoming a Pokemon master.
Well, sometimes in these fanfictions, the Pokemon themselves can take on characteristics of the Power Rangers. Like Pikachu wearing a mini Power Rangers suit and using Ranger - like moves. It's a fun and creative way to mash - up the two concepts.
Ash from Pokemon often makes an appearance in these fanfictions. Since he's the main character in Pokemon, he can be easily integrated into the Power Rangers' world, maybe as a special Ranger or an ally.
In this fanfiction, if Ash turns into a pokemon, perhaps he becomes a Charmander. He could struggle with being in a different form. He might have to adapt to the life of a fire - type pokemon, facing challenges like being weak against water - type attacks and trying to find a way to change back while still having adventures with his friends, who now have to protect him in a different way.
Well, it might be that in this fanfiction, Ash is exploring a new and dangerous area in the Pokemon world. He encounters some strange phenomena or powerful wild Pokemon. There could be a situation where he is poisoned or affected by some negative energy. His body can't handle it and he collapses. His friends or Pokemon then have to search for a cure or a way to revive him, which could be the main focus of the story.
Well, in some cases of 'pokemon ash forgotten fanfiction', it could be that Ash gets sent to a different dimension where no one remembers him. He then has to find a way to make people remember and also deal with the new and often hostile environment. He might start from scratch, trying to regain his Pokemon and his status as a trainer all while facing challenges that are unique to this forgotten state.
In certain fanfictions, Ash might die from an incurable disease that he contracts while exploring a new and mysterious region in the Pokémon world. His Pokémon then have to deal with his loss and some might go on a journey to find a way to bring him back. For example, Pikachu could be determined to find a mythical Pokémon that has the power to revive the dead.
Well, it could be about the Power Rangers finding themselves in a Disney - themed world. Maybe they have to team up with Disney characters to fight a common enemy like an evil sorcerer who is trying to take over both the Power Rangers' universe and the Disney universe. The Rangers could learn some magic from the Disney characters to enhance their powers.
I'm not sure specifically as there could be many different takes in such a fanfiction. It might involve Ash being in some sort of experimental situation, perhaps related to Pokemon powers or some new technology in the Pokemon world. But without reading the actual fanfic, it's hard to say for sure.