I'm not entirely sure as I haven't read that specific 'bad fanfic'. But generally, a 'bad fanfic' might have issues like poor characterizations, inconsistent plotlines, or bad grammar. Maybe in this 'ben 10 omniverse' fanfic, the author doesn't understand the original lore well and messes up the powers of the characters or creates really out - of - character relationships.
One possible fanfiction could be about Ben and Kai going on a new adventure in the Omniverse. Maybe they discover a new alien species that is causing chaos in a far - flung galaxy. Ben uses his Omnitrix to transform into different aliens to try and stop the threat, while Kai uses her martial arts skills to fight alongside him.
One possible plot could be that Rook and Ben go on an adventure to a new planet in the Ben 10 Omniverse. They encounter a strange alien species that has a unique power. Ben tries to use his Omnitrix to transform into an appropriate alien to deal with the situation, but there are some glitches. Rook, with his Plumber skills, helps Ben figure out what's wrong and together they overcome the challenges and make new friends among the aliens.
To improve it, one should focus on character development. In Ben 10 Omniverse, each character has a distinct personality. So, make sure the characters in the fanfic act in ways that are true to their original selves. Also, improve the writing style. Use proper grammar and vary the sentence structure to make it more interesting to read. And don't forget to check for plot holes and fill them in.
I haven't actually read this specific fanfic, but generally in a 'Ben x Esther' fanfic in the Ben 10 Omniverse setting, it might explore their relationship in different ways. It could involve adventures where they team up, and their characters' growth while dealing with various threats in the Omniverse. Maybe it also delves into how their different personalities interact and complement each other.
Well, in a fanfiction, they could be on a mission to save a planet that is on the verge of destruction. Ben uses his alien powers to hold off the immediate threats, like asteroids or attacking creatures, while Kai tries to find the root cause of the planet's problems, which could be some sort of evil technology or a corrupt leader.
One great Ben x Kevin fanfiction could be about their adventures in a parallel dimension. In this story, they might face new aliens and challenges that test their friendship even more. Maybe they find a powerful alien artifact that only works when they combine their unique abilities, leading to a deeper understanding of each other.
Well, if Ben was kidnapped in fanfiction, his friends would probably start a huge rescue mission. Gwen would use her magic and Kevin his powers to track him down. They'd face all sorts of challenges along the way, like bad guys trying to stop them or traps set by the kidnappers.
In Ben 10 Omniverse fanfics, the relationship between Ben and Gwen can be really interesting. Usually, they have a very strong bond as cousins. In some fanfics, their relationship might be explored more deeply, like how they support each other during battles. Ben with his Omnitrix powers and Gwen with her magic often make a great team, and fanfics can show their interactions in new and exciting ways, such as when they face a new and extremely powerful enemy that they have to combine their skills to defeat.
There's also a chance that it could be a former enemy of Ben who has a grudge. They might want to get revenge on Ben by kidnapping him and putting him in a difficult situation. It could also be a mad scientist who wants to study Ben's alien forms and the Omnitrix, so they kidnap him to do all sorts of experiments on him.