Harry would often be a main character in these fanfictions. Since it's about bashing his parents, his reaction and how he copes with the new view of them is a big part of the story. Another could be Sirius Black. He was very close to James, so fanfictions might explore his feelings towards the bashing of his best friend.
Well, often in such fanfiction, a theme is the distortion of the 'saint - like' image of James and Lily. Some might focus on James' past bullying and exaggerate it to make him seem completely unworthy. And for Lily, they could create scenarios where her relationship with James was more about self - interest rather than love. Also, there could be a theme of revenge, where characters who had issues with James and Lily in the original story get their 'comeuppance' in these new, bashed versions of the characters.
Often, these fanfictions might have a theme of exploring the power dynamics at play. Since Lily was a Muggle - born witch and James was from a pure - blood family, some fanfictions could play on the idea that their relationship was more about power and status rather than love. They might also explore how their actions affected the wizarding world in a more negative light, like their decision to join the Order of the Phoenix might be painted as a self - serving move rather than a heroic one.
One of the main characters often featured is probably Sirius Black. Since he was so closely associated with James, he can be a key figure in these fanfictions, either trying to defend James' reputation or being forced to face the new, negative view of his friend. Another character could be Severus Snape. Given his complex relationship with both James and Lily, he can play a major role in these stories, perhaps finally getting the 'upper hand' over James in some bashed - version scenarios.
I'm not sure about the most well - known ones specifically. However, in the vast world of fanfiction, there are likely some that have gained a following within the niche of those interested in bashing these characters. You can usually find such works on popular fanfiction platforms by using relevant search terms.
Another theme could be related to how their relationship is portrayed. Instead of the idealized love story in the original, it might be shown as more of a convenience or a relationship based on false pretenses. This can then have a ripple effect on how Harry's character is developed in these alternative versions of the story.
Fanfiction that involves 'lily bashing' in the Harry Potter universe is often about creating stories where Lily Potter is portrayed in a negative light. This could be for various reasons, like some authors might want to explore different character dynamics by making her less than the ideal mother figure she is in the original series. It might also be a way to create more conflict in the story, perhaps by showing her as having made mistakes that affected Harry more than was originally presented.
One great fanfiction could be 'Lily and James: A Love Beyond'. It delves deep into their relationship before Harry was born. It shows how they met at Hogwarts, their initial dislike which gradually turned into love. The story also includes their adventures as members of the Order of the Phoenix and how they fought against the Dark forces side by side.
Some people write 'Harry Potter James Bashing' fanfictions because they feel that James was not as perfect as he was made out to be in the original series. His bullying of Snape, for example, is a big factor. They want to explore a different side of the story where his actions have consequences.
One great 'Harry Potter Lily and James Fanfiction' is 'All the Young Dudes'. It delves deep into their time at Hogwarts, their relationship development, and how they became the people we know from the main series. It's well - written with great characterizations.