Their relationship could be one of mutual growth. Harry, through helping Dudley, is showing his kindness and Dudley, by accepting the help, is opening up to change. It could be that they are starting to understand each other better. Harry realizes that Dudley has his own insecurities about food, and Dudley sees Harry in a new light as someone who is trying to be helpful rather than just a rival. This could lead to a more positive and collaborative relationship.
In this fanfiction, they might start to become more like friends. Since Harry is helping Dudley eat better, there's a sense of care and concern that could be building a new bond between them.
It could be that Harry uses magic to make healthy foods more appealing to Dudley. He might use a spell to change the appearance or taste of vegetables so that Dudley would be more willing to eat them. Or perhaps Harry challenges Dudley to a sort of eating competition where the goal is to eat healthier foods. This would make it seem more like a game rather than a chore for Dudley.
In some fanfictions, they might become grudging friends. As adults, they could start to understand each other's past traumas better. Dudley, having grown up and away from his parents' influence, might realize how unfairly he treated Harry as a child. Harry, on the other hand, might see Dudley's attempts at change and begin to trust him more.
In some fanfics, they might become reluctant allies. As adults, they could have grown out of their childhood enmity. Maybe Dudley has seen the real threats in the wizarding world through Harry's experiences and realizes they need to work together for the greater good.
Well, perhaps Dudley uses his street - smart knowledge. He might teach Harry some rough - and - tumble moves he's learned from his own scuffles in the neighborhood. For example, showing Harry how to dodge a punch quickly.
Harry might become more open and less guarded. Since he now has a brother in Dudley, he might feel more at home in the Muggle world. Dudley, on the other hand, could become less of a bully. The knowledge that he has a wizard for a brother could make him more humble and empathetic.
It could be that Dudley has his own reasons to oppose the dark forces that are after Harry. He might see that if Harry fails, it could also mean trouble for him and his family. So, he decides to train Harry to fight as a way of self - preservation as well as helping Harry. Another reason could be that Dudley has grown to respect Harry over time and wants to contribute to Harry's ability to defend himself against the many threats he faces.
Well, Harry and Dudley's relationship would change drastically. Harry, by adopting Dudley's child, is taking on a huge responsibility. Dudley might initially be in denial about the whole situation, but as time passes, he realizes that Harry is providing a better life for his offspring. This could lead to a thaw in their long - standing animosity. Harry might start to view Dudley as someone who has made mistakes but is also trying to do right by his child in his own way. And Dudley could start to view Harry as a real family member, someone he can rely on.
I'm not sure if there is a specific 'Dudley Gets Harry mpreg fanfiction'. Fanfiction covers a vast range of ideas and pairings, but this one seems rather unusual. It might exist in the extremely diverse world of fan-created works, but it's not a common or widely - known type of fanfiction. You could try searching on specialized fanfiction websites to find out for sure.
Maybe Dudley sees a different side of Harry through fanfiction. He might be curious about the magical world from Harry's perspective that he didn't fully understand before. Fanfiction often explores characters in new and interesting ways that could intrigue Dudley.
One common theme is redemption. Dudley often has to atone for his past bullying of Harry. Another theme is friendship. Since they start off as enemies, it's interesting to see how they can become friends. Family is also a theme, as they are related, and exploring that connection in different ways can be really engaging.