No, it's not really ethical. Harry, Parvati, and Ron are beloved characters from the Harry Potter series. Bashing them in fanfiction means creating stories that are often full of negative and untrue portrayals. It goes against the respect that fans should have for the original work and its characters.
I'm not sure of specific 'harry parvati ron bashing fanfiction' stories. However, you can start by looking on popular fanfiction platforms like FanFiction.net or Archive of Our Own. Search using those exact names and explore the results. There might be some interesting stories that fit the criteria, but keep in mind that bashing characters isn't always in the best spirit of the original work.
In 'harry parvati hermione bashing fanfiction', a frequent theme is the disruption of the friendship group. The fanfic authors might play with the idea that the harmony in the group of Harry, Hermione, and the other Gryffindors is broken. Parvati could be made into a character who stirs up trouble between Harry and Hermione. It could be because she has different values or goals. Maybe she wants Gryffindor to be more about socializing and having fun, while Hermione is focused on academics and helping Harry defeat Voldemort, and this difference in priorities leads to the bashing within the story.
It can distort the perception. Readers who only read the bashing fanfiction might start to think of Hermione as more annoying than she actually is in the original. They may forget her many positive qualities like her loyalty and quick thinking. Similarly, Parvati might be seen as more malicious than she is in the books. And Harry's character can also be affected as his relationships with these two are misrepresented.
It's hard to say for sure. Fanfiction can cover all kinds of wild and creative ideas. However, the combination of 'Ron bashing' and'mpreg' for Harry and Draco seems a bit extreme. Some fanfiction writers might be interested in exploring such unique and controversial ideas, but it might also be a turn - off for many readers. You might find it by using very specific search terms on fanfiction - dedicated search engines.
One possible theme could be the relationship between Draco and Harry in a situation where they are both dealing with something as extraordinary as male pregnancy while Ron is being portrayed negatively. Maybe it's about them overcoming the challenges together despite Ron's interference or bad - mouthing.
One popular 'Harry Potter Ron bashing fanfiction' is 'The Redheaded Menace'. It often portrays Ron in a negative light, highlighting his supposed flaws more than the original series. However, bashing fanfictions can be quite polarizing among fans.
Well, it might be popular because it offers a different take on the story. The original Harry Potter series had a set relationship dynamic. But in these fanfictions, by bashing Ron, it creates a new space for Harry and Hermione's relationship to grow. It gives fans a chance to see what could have been if things were different in terms of character relationships. For example, in some of these fanfictions, we see Harry and Hermione solving problems more efficiently without Ron's impulsive behavior.
In the 'harry hermione ron bashing fanfiction' world, 'The End of the Trio's Glory' is quite known. This story could depict the trio losing their status and respect in the wizarding community. It might show Harry being too impulsive, Hermione being too overbearing, and Ron being too jealous, causing problems for everyone around them.
Yes, it can be common in some fandoms. In the Harry Potter fandom, for example, there are quite a few 'ron bashing fanfiction' pieces. Since the series has such a large and diverse fan base, different interpretations of characters are bound to happen. Some fans may focus on characters like Harry or Hermione more and see Ron as a hindrance in their relationships or adventures, so they write fanfics bashing him.