The fanfiction might also explore Ash's inner turmoil. He could struggle with self - doubt, thinking that he was not a good enough friend. However, as he faces various challenges on his own, he realizes his own worth and that the abandonment was more about his friends' own issues rather than his shortcomings.
In this kind of fanfiction, perhaps Ash loses a big Pokemon battle and his Pokemon feel disappointed and abandon him. This could lead to Ash going on a journey of self - discovery to regain their trust and friendship.
Maybe Pikachu gets mind - controlled and turns against Ash, leading to Ash being abandoned. It could also be that Pikachu is forced to leave Ash due to some external danger it doesn't want to expose Ash to.
A mysterious Pokémon whisperer might appear. This character could have the ability to communicate with Pokémon in a unique way and help Ash better understand his Pokémon, which in turn helps him grow as a trainer during his time without his friends.
One possible reason could be jealousy. Maybe Harry has achieved something great and his friends can't handle his success. For example, if he gets a very important role in a magical competition, his friends might feel overshadowed. Another reason could be a misunderstanding. Harry might be wrongly accused of something, like being in league with the dark side, and his friends, in their fear or haste, abandon him without giving him a chance to explain.
One possible plot twist could be that Charizard was actually trying to protect Ash by leaving. Maybe it discovered a great danger that was coming and thought that by leaving, it could draw the danger away from Ash and his other Pokémon.
Maybe in the fanfiction, his friends keep getting in the way of his goals. For example, if Ash is really focused on becoming a Pokémon master and his friends are constantly causing distractions or making him take detours from his training and battles.
One possible reason could be a misunderstanding. For example, if his friends accidentally made a decision that cost Ash a big Pokemon battle or an important opportunity. Another reason might be if there was some sort of betrayal. Maybe one of his friends was secretly working with a rival and Ash found out. But again, these are very uncharacteristic scenarios for the Pokemon world.
It could be a powerful and jealous trainer who wants to take Ash's place. This trainer might use dark magic or some underhanded tactics to make Ash's Pokemon abandon him so that he can swoop in and claim them for his own.
One possible plot could be Naruto growing up alone and having to fend for himself. He might develop a very independent and distrustful nature towards others at first. Maybe he starts to question his self - worth, but then through his own determination and some unexpected friendships, he begins to rise above his difficult past and prove himself to the village in ways no one expected.
One possible reason could be jealousy. Maybe Ash has achieved more in his Pokemon journey than his friends, and they can't handle it. Another reason might be some misunderstanding. For example, an enemy could trick Ash's friends into thinking Ash has done something bad. Or perhaps there's some sort of power struggle. If there's a powerful item or a rare Pokemon involved, and Ash is the main contender, his friends might be tempted to betray him for their own gain.