It could be that a powerful wizard in the Harry Potter universe sends Harry to defeat Palpatine for some greater good. Harry's quick thinking and his array of spells like Expelliarmus or the Killing Curse (although he hates to use it) could potentially be used against Palpatine. Since Palpatine is used to dealing with lightsabers and the Force, Harry's magic could catch him off - guard.
In some dark fanfiction scenarios, Vernon might kill Harry Potter out of his extreme hatred and fear of magic. Maybe he discovers Harry's magic in a moment of rage and overreacts, using a weapon or his brute force to end Harry's life. However, this goes completely against the essence of the original series where Vernon was more of a bumbling, non - magical threat.
Well, in a fanfiction world, anything can be possible. Maybe Harry Potter uses his magic skills like the Killing Curse. But it's really a strange crossover. The Joker is from a completely different universe with no magic, and Harry Potter is from a world full of magic. It would be a very unique and perhaps disturbing story to see how Harry Potter overcomes the Joker's chaos and madness with his magic and finally kills him.
The Harry Potter universe might see an influx of new magical knowledge from the Star Wars galaxy. Since Harry has interacted with it, there could be new spells or magical concepts brought back. In the Star Wars universe, without Palpatine, Luke Skywalker and the other Jedi might not have to face as many challenges. However, the dark side would still be present, and new threats could emerge. And the relationship between the two universes could become a major point of study and diplomacy for both sides.
One idea could be that Palpatine somehow discovers the wizarding world of Harry Potter. Maybe he sees it as a new realm to conquer. He could try to manipulate the Ministry of Magic using his Sith mind - tricks, and Harry Potter would have to figure out who this strange new threat is and stop him. It would be a clash of two very different kinds of magic.
Maybe in that fanfic's plot, there was a misunderstanding that got out of hand. Suppose Harry was framed for something terrible, and Hermione, believing the false evidence, felt that she had to take drastic action to protect the wizarding world from what she thought was a great threat, so she kills him. But later she realizes her mistake.
If we look at 'harry potter kills a nundu fanfiction', it's likely that the story would revolve around Harry's motivation for such an act. Maybe the Nundu was terrorizing a village or was being used by dark wizards. Harry's act of killing it could be a turning point in his character arc, making him more confident in his abilities, yet also more aware of the weight of taking a life, whether it's a beast or not. This could lead to internal conflicts within Harry as he grapples with the morality of his actions.
In a fanfiction where Naruto is hired by Palpatine, one possible scenario is that Naruto's sense of justice clashes directly with Palpatine's tyranny. Naruto, being used to a world where there are clear good and bad guys, would quickly realize that Palpatine is on the wrong side. He might try to persuade Palpatine to change his ways, using his own experiences of redemption and growth. However, Palpatine is a very stubborn and power - hungry character. So, it would likely result in a battle of wills. And depending on how the fanfiction is written, Naruto could either succeed in changing Palpatine or have to fight against him to protect the innocent in the Star Wars universe.
One possible plot could be that Anakin discovers Palpatine's plan to destroy the remaining Jedi earlier than in the original story. This early discovery gives him the chance to turn against Palpatine and kill him to save the Jedi order. Maybe he finds some hidden evidence that convinces him once and for all of Palpatine's true intentions.
One possible way in a fanfic could be that there was a misunderstanding. Hagrid might have been accidentally given a poisoned item by Harry that was meant for someone else. But still, it's a disturbing concept as Hagrid is a beloved character. It could also be that the fanfic was exploring a parallel universe where the characters' personalities and relationships are distorted, leading to this tragic event.
In some fanfictions, Draco could be under the influence of a dark magic artifact that warped his mind. This could lead him to believe that killing Dumbledore was the right thing to do. He might see Dumbledore as an obstacle to a new order that he's been convinced is better for the wizarding world.