Merlin could use his magic to show Harry visions of a better future. By giving him hope, Harry might change his mind. For example, Merlin could show Harry how his actions in the future would lead to great good.
One possible reason could be the extreme pressure he faces. Merlin has to constantly hide his magic in a world where it's feared and persecuted. This secrecy and the fear of being discovered might have built up to a point where he feels there's no way out. Also, his loyalty to Arthur might play a part. If he feels he has failed Arthur in some way, like not being able to protect him fully from threats, it could lead to such despair.
Arthur would likely be shocked and feel guilty. He might think that he has failed Merlin in some way, not realizing the full extent of Merlin's inner turmoil. He would probably become more protective and try to find out what made Merlin feel this way.
If Merlin is a show, it could be that the show's producers took legal actions against fanfiction, which effectively put an end to it.
One possible reason could be extreme loneliness. In the Merlin universe, if Harry felt he didn't belong or was constantly ostracized, it might lead him to such a dark place. Another reason could be a sense of powerlessness. Maybe he was faced with a seemingly unbeatable foe and thought death was the only escape.
Merlin might use his magic skills to help Harry. For example, he could use his knowledge of ancient spells to protect Harry from dark magic. Maybe he helps Harry in battles by creating magical shields or illusions to deceive the enemies.
Maybe it could be considered so because of the magic theme. Merlin is well - known for his magic, and in 'Harry Potter', magic is everywhere. The idea of a powerful wizard guiding the fate of others, like Dumbledore in 'Harry Potter' could be seen as similar to Merlin's role in his stories. But this is a very loose connection.
Maybe in the fanfiction, Uther discovers the creativity and the different perspectives on his world and characters, and he sees value in it. He might be a more open - minded version of himself in the fan - created stories.
In some fanfictions, Harry could be related to Merlin through a magical bloodline. Maybe Merlin's magic has been passed down through generations and somehow intertwined with Harry's family tree, like a distant ancestor connection.
Arthur might also try to impress Merlin by being more open - minded towards the common people. He could start making decisions that benefit the lower classes more visibly. For example, he might distribute food among the poor or build shelters. This would show Merlin that he is not just a king for the nobles but also cares about the well - being of all his subjects, which is something Merlin would likely appreciate as he has a kind heart.
In this fanfiction, it could be that Paul is under the influence of some evil force or has been manipulated. This makes him do things that go against his true nature. As a result, he feels so guilty and ashamed that he wants to end his life. His Pokemon might be his only hope. For example, his starter Pokemon could have a special bond with him and use that bond to reach out to his heart and prevent him from going through with the suicide attempt.