One popular storyline could be a team - up. Maybe the Powerpuff Girls and the Rowdy Ruff Boys have to join forces to fight a new, more powerful villain that neither can defeat alone. For example, a super - intelligent alien that can manipulate their minds. Another storyline could be a redemption arc for the Rowdy Ruff Boys. They start to see the error of their ways after spending some time with the Powerpuff Girls and gradually become more heroic. And a third could be a love - triangle type of situation. One of the Rowdy Ruff Boys falls in love with a Powerpuff Girl, which causes all sorts of chaos and drama within both groups.
Well, a common storyline might involve the Rowdy Ruff Boys trying to out - prank the Powerpuff Girls, but it backfires on them every time. It could be really funny to see their elaborate pranks and how the Powerpuff Girls always manage to turn the tables. Another one could be that the Powerpuff Girls get turned into normal girls for a while and the Rowdy Ruff Boys have to protect them from other villains, which is a complete role - reversal. And then there's the idea of a shared dream world where they all end up and have to work together to escape while also dealing with their own personal issues within that dream world.
In fan - created stories, the Powerpuff Girls are often portrayed as very strong - willed and moral. Blossom is usually the smart and responsible leader, Buttercup is the tough and feisty one, and Bubbles is the sweet and sensitive one. The Rowdy Ruff Boys, on the other hand, are usually more rowdy and carefree. Butch is the wild and impulsive one, Boomer is the more laid - back and sometimes naive one, and Brick is the leader who is a bit more devious compared to Blossom. Their personalities create a lot of interesting interactions in fanfics.
One popular storyline in 'the boys fanfic' could be about a new superhero joining The Boys team and their struggle to fit in while still maintaining their moral compass. They might face challenges from both the corrupt superheroes and their own team members who are initially skeptical.
A common trope is the 'Enemy - to - Allies' one. It's where the Rowdyruff Boys, who are usually enemies of the Powerpuff Girls, end up working together for a common goal. Another popular trope is 'Redemption Arc' for the Rowdyruff Boys, like in many fanfics where they gradually become less evil.
One great fanfic is 'The Unlikely Alliance'. It explores a scenario where the Powerpuff Girls and the Rowdyruff Boys have to team up to face a new super - villain in Townsville. It's full of action and some really interesting character interactions.
Well, a common 'boys over flowers fanfic' storyline is the 'what - if' scenarios. For instance, what if the lead female character had chosen a different guy from the start? How would the whole dynamic of the group change? Also, there could be fanfics that focus on the backstories of the secondary characters. Maybe one of the side characters has a tragic past that is slowly revealed and how it impacts their present actions and relationships within the 'boys over flowers' setting.
One popular storyline in Gilmore Girl fanfic is the 'what if' scenarios. For example, what if Rory had chosen Jess in the end instead of Logan. Another common one is exploring the backstories of minor characters like Lane's bandmates. And some fanfics focus on the relationship between Lorelai and her parents during her teenage years, filling in the gaps that the show might have left.
I'm not sure if there are extremely popular 'evil powerpuff girl fanfic' stories in the mainstream sense. However, in some fanfic communities, there might be ones that have gained a bit of a following. It really depends on how creative and engaging the author makes the story. Some might be popular within a small niche of Powerpuff Girls fans who are interested in seeing this darker side of the characters.
One interesting storyline could be the Powerpuff Girls Z facing a new, super - powerful villain from another dimension. This villain has powers that are the opposite of theirs and can manipulate time, causing chaos in Townsville. Another could be a story where they lose their powers temporarily and have to rely on their wits and teamwork to save the day. Maybe they team up with some of their former enemies who also realize the new threat is too great for them to handle alone.
Butch from the Rowdyruff Boys is also quite popular. His wild and impulsive nature can lead to a lot of action - packed and humorous situations in fanfic. Writers can explore his growth from a troublemaker to someone with a bit more depth.
One popular storyline could be a male OC who has unique powers and teams up with the Powerpuff Girls Z to fight a new, powerful villain. For example, he might have the power to control time, which helps them in a battle against a villain who can manipulate reality. Another could be a story where the male OC is from a different dimension and has to adjust to life in Townsville while also using his powers to help the girls. He could introduce new technologies or ways of fighting that the girls haven't seen before.