Well, first of all, his character traits and abilities can cause major shifts. If he's super powerful, he might be able to prevent certain tragedies that happened in the original story. For example, he could save Sirius Black from being killed. He also has the potential to change the social structure within the wizarding world. His actions and decisions could lead to new alliances or rivalries among different wizarding families and groups. And his relationships with the female characters might be different from what we saw in the original, which could also have a big impact on the overall story.
In powerful male self - insert Harry Potter fanfiction, the male character inserted into the story typically has a very confident and dominant personality. He may rewrite the plot in a way that makes him the center of everything. Like he could be the one to discover a new and extremely powerful magic that no one else knew about, which would then put him in a position of great influence within the wizarding world.
The self - insert could change Tom Riddle's fate by showing him true friendship. In the original story, Tom Riddle was a lonely boy who turned to dark magic. If the self - insert befriends him and is always there for him, it might make him less likely to seek power through dark means.
They could stand out by their backstory. If they come from a different part of the non - magical world or have a really strange family history related to magic. Say, their family was once part of a secret dark magic cult but they didn't know until they entered the wizarding world. This would give them a different perspective and make them stand out. Also, their attitude towards the existing power structures in the wizarding world, like being very critical of Dumbledore's decisions from the start, would make them distinct.
It subverts the original by making Harry, who is typically a hero, into an evil figure. This completely changes the dynamic of the wizarding world. For example, relationships that were positive in the original, like his friendship with Ron and Hermione, might turn into enmity in these fanfictions. Also, the self - insert allows for a new perspective that wasn't there before, which can lead to a re - evaluation of the values and themes of the original series.
The common themes include adventure. The male self - insert embarks on quests that the original characters may not have. They might explore uncharted parts of the Forbidden Forest or find hidden chambers in Hogwarts. Another theme is the struggle against the dark forces. They could be on the front line fighting Voldemort and his Death Eaters, using their unique skills or knowledge. And then there's the theme of fitting in. They have to adjust to the different culture and rules of the wizarding world, which can be a big part of their story.
Friendship is also a big theme. These characters usually form strong bonds with the original 'Harry Potter' characters like Harry, Ron, and Hermione. They go through adventures together, support each other, and sometimes even change the course of the story through their friendship. Another theme is the exploration of the wizarding world. Since the self - insert is new to this world, the author often takes the time to describe different aspects of Hogwarts, magical creatures, and spells in more detail than in the original books. This gives the readers a fresh perspective on the already - familiar 'Harry Potter' universe.
To stay true to the original story, keep the magic system intact. Don't create new spells that completely break the established rules of magic in Harry Potter. Also, respect the personalities of the existing characters. For example, Ron should still be the loyal friend, and Hermione should remain the intelligent and studious one. The male self - insert should fit into the existing plotlines rather than completely overshadowing the main characters' stories.
In many 'harry potter super powerful fanfiction', the power - up of Harry (or other characters) often changes the power dynamics in the story. For example, if Harry is super powerful, he might not need the help of his friends as much, so the strong bond of friendship that was central in the original story could be weakened. Also, the villains would have to be much stronger or use different tactics to oppose him. The challenges he faces become different, not just the typical duels and mysteries but perhaps more on a cosmic or world - changing scale.
It's moderately popular. There are dedicated communities online where male self - insert fanfiction is shared and discussed. However, it may not be as mainstream as some other types of fanfiction. A lot depends on the fandom. For example, in some larger, more male - dominated fandoms like certain superhero or action - adventure fandoms, it can be quite popular as male fans like to project themselves into the exciting worlds.
A good plot is crucial. It should blend well with the existing Harry Potter universe. For example, if it's set during Hogwarts years, it should follow the general rules and atmosphere of the school. Also, the way the self - insert character is developed matters. They should have a distinct personality and not just be a copy of an existing character.