Well, perhaps there's a mad scientist in the 'gumball turns into a girl fanfic'. The scientist is testing a new transformation ray and accidentally zaps Gumball. As a girl, Gumball discovers new emotions and ways of thinking. She might also have to face some challenges from the school bullies who are now treating her differently. And then she could team up with her friends to either find a way to change back or to show that she's still the same Gumball on the inside, no matter the outer appearance.
It could be an evil wizard who was the one who actually caused Gumball to turn into a girl in the first place. The wizard has some ulterior motives, like using Gumball's new form to gain power or to cause chaos in the town. He tries to prevent Gumball from finding a way to turn back and keeps creating obstacles for Gumball and her friends.
The other gumballs in the gumball machine might be very confused. They've never seen such a thing happen before. Some might be scared and think it's some sort of curse. The humans who find the girl - gumball could be initially shocked. But some kind - hearted ones might take her in and try to help her adjust. If there are any pets in the story, they might sniff her curiously, not really understanding what she is but sensing that she's different.
The plot could involve a mad scientist who was experimenting with a new type of candy - to - human transformation. The gumball was an accidental subject. Once it turns into a girl, she discovers that she has some unique abilities related to her gumball origin. For example, she can bounce really high or is super sweet - smelling. She then uses these abilities to help her new friends in the town she finds herself in, and at the same time, tries to reverse the transformation if she wants to.
First, you need to establish the reason for the transformation. It could be a magical spell gone wrong, or some kind of strange dragon - related phenomenon. Then, focus on how Hiccup adjusts to her new body. She'll have to deal with different physical abilities and limitations. For example, she might be physically not as strong as before, but more agile in some ways.
A fanfic could explore how Hiccup's transformation into a girl affects his friendships. Astrid might react in a complex way. At first, she could be jealous or confused, but then they could form a stronger bond. Also, Hiccup's father, Stoick, might have a hard time adjusting to his son becoming a daughter, which could add a lot of emotional depth to the story.
One possible scenario in this fanfic could be that Tony Stark, through some sort of magic or scientific experiment gone wrong, turns into a girl. This could lead to a whole new set of adventures and character developments. For example, his relationships with other characters like Steve Rogers (Stony) would be completely different. He might have to face new challenges in a different physical form, such as how society and his friends would accept him. Also, his own self - perception would change, and he'd have to re - evaluate his identity.
Well, in a 'freed turns into a girl' fanfic, the plot might start with an experiment gone wrong. Freed was perhaps trying to enhance his magic power and something in the experiment caused his physical form to change to that of a girl. He would have to deal with the reactions of his guildmates. Some might tease him, while others would be more understanding. And he would also face challenges like how to adapt to the new body's physical limitations while still being able to participate in guild activities.
The fanfic might also explore how Issei's powers are affected by the transformation. In the original Highschool DxD, Issei has his own set of abilities as a male. But as a girl, he could either have new powers related to femininity in that universe or his existing powers could be modified. This could lead to new battles and challenges where he has to learn to use his powers in a different way.
Well, one possible plot could be that Deku accidentally drinks a strange potion created by a villain. This potion has the side - effect of changing his gender to female. At first, he's shocked and confused. But then, he realizes that he can use this new form to his advantage in hero work. For example, he might be able to infiltrate a female - only villain group more easily. He also has to deal with his friends' reactions, some are surprised while others are supportive and help him adjust to his new body while still being a hero.