What could be the plot of a 'Ben 10 Dressed as a Girl' fanfiction?

The main antagonist could be an alien who has a vendetta against Ben specifically. This alien might be able to sense Ben's true identity even when he's dressed as a girl. He could try to expose Ben and foil his mission or just cause general chaos while Ben is in his disguised state.

Well, maybe Ben 10 gets transformed into a girl by some alien device malfunction. Then he has to deal with all the new experiences like how people treat him differently, and he might discover new powers related to his new form.

A possible plot could be that Harry is entered into a magical competition where the rules state he has to compete as a girl. So he dons a girl's disguise and has to deal with the challenges not only of the competition but also of maintaining his new identity. His friends might have a hard time adjusting too, and there could be some comical misunderstandings along the way.

In a family with a lot of siblings, they decide to put on a show for their parents. One of the brothers is dressed as a baby girl. He is initially against it but then realizes he can use this opportunity to prank his parents. He acts overly cute and girly, and his parents are completely fooled at first. Then he reveals the truth and they all have a good laugh. Along the way, he also realizes that there's no harm in looking different and that family fun is more important than adhering to traditional gender appearances.

Well, it could be about Ben 10 being transformed into a girl and then having to deal with the differences in how society treats him/her. Maybe he/she has to face new challenges in using the Omnitrix while being a girl.

In this fanfiction, it could be that the Necrofriggian babies are the result of some sort of experiment gone wrong. Ben stumbles upon them and realizes that he is the only one who can help. He has to figure out how to reverse the effects of the experiment while also dealing with the fact that the babies are in a very fragile state. He might enlist the help of his friends, but also face challenges from those who don't want the experiment to be reversed.

The plot might involve Ash dressing as a girl due to a bet or a dare. In the Sun and Moon setting, he then has to go about his daily Pokémon - related activities like catching new Pokémon and battling, all while looking like a girl. This could lead to some humorous situations, like other trainers underestimating him. As the story progresses, he could prove that appearance doesn't matter when it comes to Pokémon training.

Well, it could be about a boy who has to dress as a school girl for a school play. He initially feels awkward but then realizes it's fun as he gets into character and nails his performance.

The plot could be that the boy gets the idea to dress as a girl because he admires the creativity in girls' costumes. He might face some initial confusion or teasing from his friends or neighbors. But as he goes about trick - or - treating or to a party, he wins people over with his confidence and unique look. Eventually, he has a great time and realizes that it doesn't matter what you wear as long as you're having fun.

Well, perhaps the baby's older sister always wanted a little sister. So she dressed the baby as a girl. The parents found out and at first were a bit shocked but then saw how happy it made their daughter. In the end, they took some really cute pictures of the 'baby girl' and it became a story they would always tell with a laugh.