Well, it would be a total chaos. He might use his magic skills to cause destruction. For example, he could turn Hogwarts into a dark fortress and rule over it with an iron fist. His friends would be shocked and probably try to stop him, leading to some really intense battles.
The wizarding world would be in shock. People who once idolized him would feel betrayed. The Ministry of Magic would probably declare him a most wanted wizard and send out Aurors to capture him.
There could be an outcast wizard who has been shunned by the mainstream wizarding society. They found solace in the idea of supervillains and their ability to go against the norm. Harry, being the kind - hearted person he is, reaches out to this outcast and over time, they fall in love and the idea of marriage comes up.
Well, perhaps the plot could involve Harry being under some sort of spell or charm that makes him attracted to a supervillain - like character. Maybe this supervillain - fan has a change of heart because of Harry's love and they try to navigate the wizarding world together while facing opposition from both the good and bad sides.
One idea could be that Harry discovers a hidden centaur community in the Forbidden Forest. He's initially scared but soon realizes they have a deep connection to magic that Hogwarts has not taught. He starts learning from them, about their archery skills and how they communicate with nature.
If Harry Potter becomes a Sith in fanfiction, it would be a wild departure from his original character. He'd likely trade his Gryffindor values for the dark and power - hungry ways of the Sith. His magic could take on a more menacing form, and his relationships would be severely strained. For example, his friendship with Ron and Hermione might turn into enmity as he delved deeper into the dark side.
Well, if Harry Potter becomes a genie in fanfiction, he could use his magic in very different ways. He might be able to grant wishes, which would be a huge change from his usual spell - casting. For example, he could grant the wishes of his friends like Hermione and Ron. Maybe Hermione would wish for all the knowledge in the world to be easily accessible, and Harry as a genie could make it so.
Sure. In the world of 'Harry Potter' fanfiction, the concept of Dudley as a wizard isn't unheard of. Some fanfictions might use this idea to show Dudley's redemption arc. He could start as the bully we know from the original books but then transform into a wizard and learn about the values of the wizarding community. It can also be a way to explore the Dursley family's relationship with magic in a different light, rather than just being Muggles who shun it.
Some of the more progressive magical families like the Weasleys might side with Harry. They've always been on the side of good and if Harry shows that his rule would bring positive changes to the wizarding world, they'd be his allies.
The perception of Harry would be turned upside down. In the original series, he is the symbol of good and the one who defeats Voldemort. But in this fanfiction, he is the one causing harm, which makes readers question everything they thought they knew about his character. His motives, actions, and relationships would all be seen in a new and disturbing light.