In this fanfiction, Dudley would surely interact with the Hogwarts professors. Professors like McGonagall would be strict with him, making sure he follows the rules. He might also cross paths with Draco Malfoy. Given Malfoy's attitude towards Muggle - borns, there could be some conflict there. And let's not forget the other students in his house. They would play a big role in his Hogwarts experience, either befriending or ostracizing him.
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.
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.
A theme that can't be ignored is the power of change. Dudley, who was once a bully, can change into someone who is more understanding and empathetic. Harry, on the other hand, gets to see a different side of Dudley and also changes his view of him. This shows how people can grow and transform in relationships.
In many Harry Potter fanfictions, a fight between Harry and Dudley can be quite intense. In the context of cartoons, it could be depicted in a more exaggerated way. Maybe Harry uses his magic in a comical way that still manages to overpower Dudley's brute force. For example, he could make Dudley's pants fall down every time he tries to punch, turning the fight into a humorous spectacle.
One great Dudley Dursley story is when he finally realizes how mean he has been to Harry Potter. It shows his growth as a character. For example, in the later parts of the series, Dudley starts to see Harry in a different light and even shows a bit of kindness, which is a big change from his bullying ways at the start.
I'm not entirely sure specifically what that particular fanfiction is about as there are countless fanfictions out there. But generally, in a 'harry mpreg' concept in fanfiction, it might involve Harry from the Harry Potter universe in a situation where he becomes pregnant, perhaps with some unique plot twists involving Dudley in this case.
In the story where Dudley is on a diet and the magic pudding appears, it's a really good Dudley Dursley story. He is so focused on his diet but then this magical pudding comes along and completely throws him off. It shows his struggle with self - control and also how the magic in Harry's world can disrupt the normal order of things in the Dursley household. This also reveals more about Dudley's character, especially his relationship with food and his desire to fit in with his family's idea of a proper lifestyle.