In this fanfiction, Beast Boy could turn into a girl because of an encounter with an alien artifact. As a girl, he discovers new aspects of his powers. Maybe he can now communicate with different animals in a more empathetic way. His relationships with the other Titans change too. Starfire might take her on shopping sprees, thinking she needs more 'girly' things.
Maybe it could be about the power of magic or a strange scientific experiment. In many fictional stories, there are elements that can cause such radical transformations. This could add an interesting twist to the plot as the boy-turned-girl has to navigate a world with a new body and identity.
One possible fanfiction could involve Beast Boy and Storm meeting in a multiverse scenario. Maybe Beast Boy is on a mission in Storm's world and they initially clash due to their different powers and personalities. But as the story progresses, they start to understand and respect each other's abilities and end up working together to defeat a common enemy.
Maybe in the fanfiction, Beast Boy accidentally drinks a potion that turns him into a girl. As a girl, he has to deal with things like different clothing styles and social expectations. His powers might also be affected in some way. For instance, the animals he turns into might react differently to him as a girl. His friendship with Robin could also change as Robin has to be more cautious around him/her now.
A fanfiction could also focus on their relationships outside of being superheroes. They could be having a normal day at the Tower, just hanging out. Starfire could be trying to cook something new from her home planet, Raven could be reading a book in the corner, and Beast Boy could be cracking jokes, which at first annoys Raven but then she starts to laugh.
In such a fanfiction, Harry Potter's transformation into a horse could be a part of a larger plot. For example, it could be related to a dark magic experiment that was meant for something else but accidentally affected Harry. His friends, like Hermione and Ron, would be in a frenzy trying to figure out how to turn him back. Hermione would likely be researching every book she could find on Transfiguration and dark magic. Ron, on the other hand, might be more focused on keeping Harry safe and comfortable in his new form. And Harry himself would be dealing with the shock and confusion of being a horse, all while still having his human mind intact and trying to communicate with his friends in whatever limited ways he can.
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, Cyborg could also be a main character. He and Beast Boy are good friends, and Cyborg might have to adjust to his friend's new appearance and the changes that come with it. And then there's Robin. As the leader, he would need to deal with how Beast Boy's transformation affects the team dynamics. Maybe he has to figure out new strategies that take into account Beast Boy's new situation.
Sonic turning into a robot in fanfiction could also be a self - sacrifice situation. Suppose there's a powerful energy source about to explode and Sonic, in order to contain it, fuses with some nearby robotic parts. This would give him the ability to withstand the blast but at the cost of his normal form. His friends would be shocked at first but then try to find a way to restore Sonic. It could lead to an interesting adventure filled with emotions and high - stakes situations.
In a Hermione turns into a Nundu fanfiction, the story could start with Hermione feeling a strange connection to the Nundu in the magical creatures' book. She becomes so intrigued that she tries to perform a spell to understand it better on a deeper level. However, the spell mutates and she transforms into a Nundu. As a Nundu, she experiences the world in a completely different way. She can't communicate with her friends as she used to. Her friends would first be shocked and then start looking for solutions in every magical book and from every magical expert they know.
One possible scenario could be that Pikachu is exposed to a strange type of energy. This energy mutates its genetic structure, slowly transforming it into a human form. At first, Pikachu might be confused and scared, not understanding its new body. But as time passes, it starts to learn about human ways, like walking on two legs and using its hands to pick things up.