The relationship between Harry and Dudley becoming friends could have a polarizing effect on the Dursley family. Dudley's newfound friendship with Harry could cause a rift between him and his parents if they don't accept it. However, it could also be a catalyst for change. If Dudley is able to show his parents that Harry is not a bad influence and that there are good things about the wizarding world, it could lead to a more harmonious relationship within the Dursley family in the long run.
Sure. Fanfiction often takes the existing characters and situations and twists them. For Harry and Dudley, it could start with a shared experience that makes Dudley realize Harry isn't so bad. Maybe they get caught up in a magical adventure together outside of the normal Hogwarts - related stuff. This common experience could break down the barriers between them and start a friendship.
In many 'Harry Potter Dursley fanfiction' stories, the Dursleys are used as a contrast to the wizarding world. Their normal, mundane lives are juxtaposed with the magic and wonder of Harry's world. This can create interesting storylines where they are either forced to accept the magic or try to fight against it in their own stubborn ways.
Well, for their children, it would be a very difficult situation. They would have to deal with a broken family, and might experience confusion, sadness, and even anger. Their friends like Ron and Hermione would also be deeply affected. Ron, being Harry's best friend, would be torn between supporting Harry and trying to keep the family together. He might feel guilty if he couldn't prevent the divorce.
The most obvious deviation is the relationship between them. In the original story, they are mostly at odds. But in lemon fanfiction, they might have a much closer, even romantic or sexually - charged relationship, which is completely different from the canon. Also, their character traits can be altered. Dudley may be less of a brute and more understanding, while Harry might be more open to Dudley in ways that the original story doesn't suggest.
Their friends could be divided in their reactions. Some friends might be supportive in a quiet way. They might see how happy Harry and Ginny are, even in secret, and be happy for them. However, others might be worried. They could be afraid that if the relationship is discovered, it could cause problems. For instance, it might cause a scandal in Hogwarts if the teachers find out. And some friends might be jealous, especially if they have a crush on either Harry or Ginny. This could create some tension among the friend group.
One way is to give Dudley a moment of self - reflection. Maybe he overhears some cruel remarks about himself from other Muggles who are as narrow - minded as his parents. This makes him realize how wrong his family's treatment of Harry has been, and he starts to change. He could then begin to learn about the wizarding world from Harry in secret, slowly becoming more open - minded and kind.
Well, it changes their relationship in that they become closer. Dudley's overprotective nature means he starts to see Harry as someone precious to him. This could lead to them sharing secrets. Harry might tell Dudley more about the wizarding world, and Dudley could confide in Harry about his insecurities. They might even team up against common enemies, like those who look down on both of them for different reasons. Overall, it makes their relationship more complex and interesting.
His friends might not understand at first. They could be confused as to why Harry is being grounded and might try to convince him to break the rules. This could create some friction between Harry and his friends if he refuses, as they think he's being overly cautious.
One common theme is redemption. Dudley has been a bully to Harry for a long time, so many fanfictions explore him seeking redemption for his past actions. Another theme is family. Despite their difficult relationship, they are family, and fanfictions often play with this idea, showing how they can come to terms with each other.
There might be a fanfiction where Dudley gets involved in a magical adventure accidentally. For example, he stumbles upon a magical object that was meant for Harry but now has drawn him into a dangerous yet exciting situation in the wizarding world. He has to learn to rely on his own courage and the help of some unlikely allies.