Love - hate relationships are also likely to be a theme. The stories could play around with the idea of an intense, complex relationship between Dudley and Snidely, where there are elements of both animosity and an underlying, strange attraction or respect.
Redemption could be another theme. There could be stories where Snidely has a change of heart and his relationship with Dudley evolves in a new way. It might show how Dudley reacts to this unexpected change in his nemesis.
I'm not sure of specific fanfiction titles off - hand. But you can try searching on popular fanfiction websites like Archive of Our Own. They usually have a wide variety of fan - created stories for different pairings.
One common theme could be friendship. Despite their differences, Dudley and Kitty could be shown forming a strong bond. Another might be adventure, where they go on exciting journeys together.
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.
One common theme is friendship. They might start as unlikely friends and then develop a strong bond over time. Another theme could be growth. Both Dudley and Kitty might grow as characters through their interactions with each other, learning important life lessons.
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.
One common theme is redemption. As Dudley was a bully in the original story, many fanfictions explore his journey towards redemption and making amends with Harry. Another theme is friendship. They show how two characters who were once at odds can become friends over time.
One common theme is redemption. Many fanfictions focus on Dudley changing his ways after years of being a bully. They show him realizing the error of his actions and trying to make amends.
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.
Another theme is the discovery of the magical world. If Dudley is the main focus, the fanfiction might show his shock and awe as he discovers all the magic that Harry has been a part of. It's a theme that allows for a lot of interesting descriptions of the magical elements.
A theme could be sacrifice. Characters in this type of fanfiction may find that doing the right thing requires them to sacrifice something they hold dear, like a relationship, a possession or an opportunity. It shows their growth and the depth of their moral compass. Also, forgiveness can be a part of it. When wronged, characters might consider whether it's the right thing to forgive, which can lead to complex and interesting storylines.