A group of Team Rocket - like villains could be the main antagonists. They might want to capture Pikachu while it's in the process of evolving because they believe that an evolving Pikachu would have some special power that they could use for their evil plans. They constantly try to disrupt Pikachu's evolution and the bond between Pikachu and its trainer.
One possible plot could be that Pikachu is exposed to a rare type of thunderstone during a powerful thunderstorm. This thunderstone has been charged with an ancient energy. Pikachu absorbs this energy and begins to evolve. But instead of evolving into Raichu right away, it goes through a series of strange and new intermediate forms, each with unique powers. As it evolves, Pikachu has to learn to control these new powers while also facing challenges from other Pokemon who are either jealous or see it as a threat.
Another possibility is a rival trainer who has a Pokemon that is weak against Raichu. This trainer might try to prevent Pikachu from evolving to keep their own Pokemon's advantage in battles. They could try to steal Pikachu's food or training resources to slow down its growth and evolution.
One possible plot could be that Pikachu is exposed to a rare form of electric energy in a thunderstorm that's charged with some mysterious power. This could start the evolution process. It might struggle at first, not understanding the changes its body is going through. As it evolves, it could gain new abilities like enhanced speed and a more powerful electric attack. And it might have to face new challenges in battles, as opponents are now more cautious of it.
Well, if Ash's Pikachu evolved into Raichu in fanfiction, it could change the whole dynamic of their journey. Pikachu's evolution might bring new power levels and moves, making battles easier or more complex. Ash would need to adjust to the new Raichu, and their bond might be affected. Maybe Pikachu's cute factor would be replaced with a more intimidating Raichu presence. It could also lead to new storylines where Ash has to deal with the jealousy of other Pokemon or trainers who are envious of his powerful Raichu.
Well, a fanfic about Pikachu and Porygon can be charming because of their contrasting natures. Pikachu is this cute, furry, and very physical Pokemon. Porygon, in contrast, is a digital entity. In a fanfic, their differences can lead to many comical situations. For instance, Pikachu might get confused when Porygon does something like disappearing into a digital portal suddenly.
In a fanfic, Meowth's evolution might be a result of a magical spell gone wrong. Instead of evolving into a normal form, it becomes a hybrid of different Pokemon types. This new form gives it strange and wonderful abilities, like being able to turn invisible or create illusions. But it also has to deal with the confusion of its new identity and how other Pokemon and humans react to it.
Well, first of all, it's not in line with the moral and ethical standards of the Pokemon world. The Pokemon series has always promoted positive values like friendship and perseverance. Mating - related fanfics are completely off - track and can also have a negative impact on the brand image of Pokemon.
A fanfic involving Pikachu and Porygon might focus on their friendship. Pikachu, being the more outgoing and energetic one, could introduce Porygon to the joys of playing in the grass and chasing butterflies. Porygon, on the other hand, could show Pikachu the amazing digital landscapes it can access. Their friendship could grow as they learn from each other's worlds, and together they could face challenges like an evil Team Rocket plot to capture both of them.
In a Porygon and Pikachu fanfic, their different abilities would play a big role. Porygon, being a digital Pokemon, might have the power to manipulate data. Pikachu, on the other hand, is known for its speed and electricity. The fanfic could start with them meeting in an unexpected place, like a forest that has some strange digital glitches. Then they have to work together to figure out what's going on. Maybe they discover that a new villain is trying to use Porygon's digital powers for evil, and Pikachu has to protect it.