It's possible that in a 'pokemon killed pikachu fanfiction', Pikachu could be killed by a natural disaster caused by a Pokemon. Let's say a Groudon goes on a rampage and its earth - shattering moves accidentally kill Pikachu. Ash would be devastated. Other Pokemon in the area might scatter in fear. This could lead to a story about how the Pokemon community tries to control Groudon and also how Ash copes with the loss of his beloved Pikachu.
Yes, in some 'pokemon killed pikachu fanfiction'. Maybe a group of evil Pokemon trainers force their Pokemon to attack Pikachu. For example, a gang of Team Rocket - like trainers with strong, aggressive Pokemon like Houndoom and Tyranitar. Pikachu tries to fight back but is outnumbered and eventually killed. This could then set off a chain of events where the Pokemon world is in shock and Ash has to deal with his grief while also trying to find out who was behind it.
One common reason could be jealousy among other Pokemon. Some Pokemon might be jealous of Pikachu's closeness to Ash and its popularity. So, they might plot against it and end up killing it. Another reason could be a misunderstanding. For instance, a wild Pokemon might misinterpret Pikachu's actions as a threat and attack it fatally.
Well, in this fanfiction, if Ash turns into Pikachu, it might lead to a story where Pikachu - Ash discovers new aspects of the Pokémon world. For example, he could experience the world from a Pokémon's perspective, understanding their fears and joys more deeply. He might also have to deal with other Pokémon who don't immediately recognize him as Ash and react in different ways to this strange Pikachu.
A possible plot could be that Pikachu gets lost in a new forest. There, he meets a Sylveon. Sylveon helps Pikachu find his way back home. During their journey, Pikachu starts to develop feelings for Sylveon. Sylveon is also attracted to Pikachu's brave and friendly nature. When they finally reach Pikachu's home, they don't want to be apart and decide to stay together, facing any challenges that come their way as a couple.
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.
One possible plotline could be Olivia going on a Pokemon journey with a new trainer named Lemon. They might face various challenges together, like battling tough Gym Leaders and trying to catch rare Pokemon.
One possible plotline could be that female Pikachu somehow ends up in the Naruto universe. Naruto, being the curious and friendly guy he is, befriends her. They then team up to face a common enemy that is causing trouble in both the ninja world and Pikachu's world. Another could be a more light - hearted plot where Pikachu's electric powers are used in the Naruto world in a comical way, like helping Naruto prank his friends or power up some of his jutsu in unexpected ways.
The fanfiction could be about how the Pokemon world has changed over time and Pikachu is left behind as an 'old - fashioned' Pokemon. It might face discrimination or neglect because of its age. The death of Pikachu could be a symbol of the end of an era in the Pokemon world. It could also explore how the younger generation of Pokemon and trainers view Pikachu's legacy.
One possible reason could be that Pikachu is separated from Ash. In many fanfictions, their bond is so strong that being apart would be extremely distressing for Pikachu, leading it to cry.
One possible plotline could be that Naruto is lured into a trap by the Akatsuki. They use his overconfidence against him. Maybe they pretend to have a hostage that Naruto wants to save, and when he arrives, they overpower him with their combined jutsu. Another could be that they manage to find a way to nullify his Nine - Tails chakra, leaving him vulnerable to their attacks.
In a more complex story, there could be a curse placed on Pikachu by an ancient Pokemon spirit. This curse gradually weakens Pikachu over time. As it gets sicker, Ash tries everything he can to find a cure. But in the end, Pikachu's body gives out. Ash is left to deal with the grief, and he embarks on a journey to find a way to break the curse and bring Pikachu back.