It could develop after a major event changes Dudley's perspective. Say, Dudley witnesses the true extent of the danger Harry faces in the wizarding world. This could make him feel protective of Harry. He might start to defend Harry against their parents' unfair treatment. And Harry, seeing Dudley's change, would be more open to being friends. They could then start to communicate more, sharing their hopes and fears, and slowly but surely, a friendship would form.
Well, their friendship could start with a common goal. Maybe they find out about a hidden danger in Hogwarts that the teachers are unaware of. Harry's bravery, Hermione's intelligence and Draco's knowledge of the Slytherin side of things could combine to solve the mystery. They might initially be reluctant to work together, but as they face challenges, they start to respect each other more and form a real friendship.
Well, if Harry and Dudley became friends, it would drastically change the whole dynamic of the early Harry Potter story. For one, Harry might not have felt so alone at the Dursleys' place. Dudley could have protected Harry from Vernon's wrath. Also, they could have shared secrets about the wizarding world with Dudley being a Muggle. This new friendship might even have led to Dudley developing an understanding and acceptance of the magical world much earlier, and perhaps he could have been an ally to Harry in the fight against Voldemort, instead of a bully.
Well, their friendship could start with a common interest in a particular subject like Potions. Maybe they get paired up for a project and initially dislike each other but gradually realize they have more in common than they thought. For example, they both might be really interested in the history behind the potions and start sharing books and knowledge. This could lead to them spending more time together and slowly forming a bond.
One possible plot twist could be that Dudley discovers he has some latent magical ability. This would completely change their dynamic as Dudley has always been the 'Muggle' bully. It could lead to him having to rely on Harry for guidance in the wizarding world, which in turn would force them to become friends as they navigate this new situation together.
One aspect it could explore is Dudley's relationship with Harry. In the original story, they have a rather strained relationship. But if Dudley becomes a wizard, they might have to reconcile and even become allies. For example, they could face a common enemy together. Another area could be Dudley's adjustment to the wizarding world. He'd have to learn about magic, which he previously mocked. This could lead to humorous situations as he tries to master spells and potions.
Their friendship might also develop from Naruto's efforts to understand Kyuubi's past. By learning about Kyuubi's history and the reasons it was sealed, Naruto could feel empathy towards it. This could lead to more communication between them, with Naruto no longer just seeing Kyuubi as a source of power but as a friend with its own story.
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.
Perhaps a mutual friend like Hermione could play a role. She might set up a situation where Draco and Harry have to work together on a project. At first, they would be reluctant, but as they start to see each other's positive qualities, like Draco's determination and Harry's loyalty, they begin to respect each other and a friendship could form.
Often, it starts with a moment of curiosity. Maybe Harry is intrigued by Banner's scientific knowledge or Banner is fascinated by Harry's magic. Then they start to communicate, slowly getting to know each other.
In a Hogwarts setting, their friendship could start gradually. Maybe they get paired up for a difficult project in Potions. At first, they're both hesitant and a bit hostile, but as they work together, they realize they have more in common than they thought. Hermione's thirst for knowledge and Draco's cunning could combine in interesting ways to solve the project's challenges. This shared experience could be the first step in breaking down the barriers between them.