Yes, there are some fanfictions that explore the idea of Dumbledore being evil. Some authors might do this to add a new and unexpected twist to the well - known story. They might question Dumbledore's actions and motives, such as his decisions regarding Harry Potter's upbringing and the way he handled the fight against Voldemort. However, this is a very different take from the original story where Dumbledore is generally seen as a wise and benevolent figure.
One common theme is manipulation. Writers may show Dumbledore as using Harry and others for his own secret ends. Another theme could be misinformation. They might depict Dumbledore as spreading false information to keep control. Also, power - hungry is a theme, where Dumbledore is seen as being after more power than he lets on.
In some fanfiction concepts, Harry might defeat an 'evil' Dumbledore if Dumbledore was secretly under the influence of a dark magic artifact. This could twist his good intentions and lead him to actions that Harry would oppose. Harry, with his strong sense of justice and loyalty, would then fight against this corrupted Dumbledore.
One common theme is betrayal. Since Dumbledore is made evil, Harry feels betrayed by someone he once trusted. Another theme is power struggle. With Harry being godlike, there's a struggle between his new - found power and Dumbledore's devious plans.
I'm not sure about a specific 'godlike harry potter evil dumbledore fanfiction' off the top of my head. But generally, in such fanfictions, the writer might rewrite the plot so that Dumbledore has been manipulating events all along for his own gain, and Harry, with his new 'godlike' powers, has to oppose him. You can try searching on fanfiction websites like Archive of Our Own or FanFiction.net.
Well, in certain Harry Potter fanfiction, Dumbledore can come across as insane. It really depends on the writer's interpretation and the direction they want to take the story. Some might do it for shock value, to create a more edgy or different take on the well - known character. However, the canonical Dumbledore was a highly intelligent and calculating figure, not insane.
Well, Harry might outsmart Dumbledore by using his unique understanding of the magical world in ways Dumbledore doesn't expect. For example, Harry has a more direct experience with some dark magic items due to his encounters with Voldemort. He could use this knowledge to make decisions that seem counter - intuitive to Dumbledore but are actually more effective in a particular situation.
He might give Harry detention. Harry could be made to clean the trophies in the trophy room or help Hagrid with some difficult tasks in the Forbidden Forest under strict supervision.
One possible reason could be that Harry breaks school rules in the fanfiction. For example, if he ventures into the Forbidden Forest without permission. Dumbledore is strict about the safety of students and such disobedience might lead to punishment.
Maybe the 'evil' Dumbledore was a future version of himself who had been corrupted by time - travel gone wrong. Harry, not fully understanding the situation, battles and defeats this future Dumbledore. This could then lead to a complex time - paradox plot where Harry has to find a way to fix the timeline and save the real Dumbledore from this fate.