One way could be to have the Cartoons Ninja be a magical being from a different dimension that has the ability to cross into the Harry Potter universe. Dudley could encounter this ninja first, thinking it's just some new strange thing in his muggle world. But then it turns out the ninja has a connection to Harry's world. Maybe the ninja is on a mission to find a powerful magical item that Harry also needs, and Dudley gets caught in the middle.
Perhaps in the fanfiction, the Cartoons Ninja is a time - traveling entity. It travels back in time to when Dudley and Harry were kids. The ninja's presence starts to influence Dudley's actions towards Harry. Instead of bullying Harry, Dudley becomes curious about the strange things that seem to happen around Harry. This change in Dudley could lead to a completely different dynamic between the two. And as they grow up, the ninja continues to be involved, guiding them through different challenges in both the muggle and magical worlds.
A fanfic might involve the Cartoons Ninja as a character who has the power to transform the personalities of those around them. The ninja could meet Dudley and start to change his bratty behavior into something more positive. This new Dudley could then befriend Harry in a more sincere way. The ninja could also introduce elements from their cartoon world into the Potter universe, like unique spells or magical creatures that are based on the ninja's cartoon origin.
Well, a fanfiction involving Harry Potter, Dudley, and 'Cartoons Ninja' could be really interesting. Maybe it could be a story where Dudley somehow gets involved in the magical world of Harry Potter through a portal created by a 'Cartoons Ninja' character. The ninja could have some unique powers that interact with the magic in the Potterverse.
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.
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.
In this fanfiction, perhaps Dudley's envy of Harry's magical world finally boiled over into uncontrollable rage. He might have found a way to cross into the wizarding world without anyone knowing. And in a moment of extreme jealousy and anger, Dudley could have used some kind of weapon or spell (maybe through some dark magic loophole) against Harry, which unfortunately led to Harry's death. Fanfiction allows for these extreme and unexpected plot twists.
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.
They could be in a time - travel scenario. Harry Potter accidentally takes Rose and Dobby back in time. They have to work together to get back to their own time. Dobby's house - elf magic might be crucial in finding a way back, while Rose uses her modern - day knowledge of magic (maybe she's read a lot about old magic) to help them along, and Harry Potter uses his experience from his own adventures.
There's a fanfiction called 'Dudley's Discovery in Harry's World'. It's a long - form fanfiction that delves deep into Dudley's experience when he gets involved in Harry's magical world. It shows how Dudley adapts to the new environment, his struggles, and his growth. It's over 100 words because it has a detailed exploration of Dudley's character transformation, which is really interesting to read.
Well, it could start with Baruto being magically transported to the Harry Potter universe. He stumbles upon Harry in his stag animagus form. They quickly become friends as they realize they both have a sense of justice. They then decide to explore the Hogwarts grounds together, with the stag leading the way. The stag's presence could make Baruto feel a sense of calm and wonder in this strange new world.
One way is to have a magical accident. Maybe a wizard in the Harry Potter universe was experimenting with interdimensional travel and accidentally brought Vegeta and Piccolo to the stadium in the wizarding world. Then they all have to figure out how to get back to their own worlds while dealing with the chaos that ensues in the stadium, like angry fans or other magical creatures that are attracted to the strange energy.
The magic in Harry Potter is more about spells and potions, while Orange Lantern power is based on the emotional spectrum. In a fanfiction, they could combine by having a spell that unlocks the potential of the Orange Lantern ring within a wizard. For example, a powerful 'Revelio' - like spell could reveal the hidden power of the ring that a wizard has found.