Well, he might have to rely on others for basic things like getting food. Since he's a cat, he can't open cupboards or cook. He'd probably be really frustrated at first, hissing at anyone who tries to touch him out of pride. But eventually, he might warm up to some people, especially if they give him fish.
In the fanfiction, Sasuke as a cat could be a really interesting scenario. He'd lose his ability to use his ninja skills directly. His heightened senses as a cat could lead to some comical or intense moments. For example, he might be constantly on edge because he can hear every little sound. Also, his friends would have a hard time recognizing him at first, which could lead to some misunderstandings and funny situations.
It might be due to some scientific experiment gone haywire. In a fanfiction world where science and ninja techniques are combined, an experiment that was supposed to enhance Sasuke's abilities could have had the unexpected side - effect of changing his gender. This could lead to all sorts of interesting plot developments, like how he copes with his new physical form and how his relationships with other characters change.
In the 'Harry Potter gets turned into a cat' fanfiction, there could be a lot of comical situations. Imagine Harry trying to attend classes as a cat. He might jump on desks, knock over ink bottles, and cause chaos in the classroom. His professors would be very confused about this strange cat's behavior. And when it comes to fighting Voldemort, it would be a very different scenario. He might use his cat - like agility to dodge spells, but also have to find a way to cast his own magic in this new form.
Sasuke's personality would change quite a bit. His pride would still be there, but it would be expressed differently. He might be more aloof as a cat, not wanting to be coddled. He'd also be more territorial, marking his space in ways a normal Sasuke wouldn't. And he'd be more independent, trying to solve his problems on his own even though he's now a small cat.
One great fanfiction with this premise could be 'Midoriya's Feline Adventure'. In it, Midoriya's transformation into a cat brings out some really cute and funny situations. His friends initially don't recognize him, and there are a lot of misunderstandings that lead to comical scenes. For example, Bakugo tries to shoo him away thinking he's just a stray cat, not realizing it's Midoriya.
Well, in such a fanfiction, probably Batman's sidekicks would have to take care of him. They'd be in a really strange situation, having to protect a baby Batman from the villains who might see this as a great opportunity to get rid of him once and for all.
In this kind of fanfiction, Naruto might have to deal with a whole new set of powers and instincts. He would likely struggle with the urge to consume human flesh, which is a huge contrast to his usual values. Maybe he'd try to find an alternative way to survive, like the vegetarian ghouls in Tokyo Ghoul. His ninja skills could also be combined with his new ghoul abilities in interesting ways, for example, using his enhanced strength and speed from being a ghoul in combat while still relying on his ninja techniques like shadow clones.
In a fanfiction where Deadpool is turned into a child, his internal monologue would be hilarious. He'd probably still have all those wild thoughts running through his head, but they'd be filtered through a child's perspective. He might be more focused on things like getting ice cream or playing with toys, while also trying to figure out how to get back to his normal self. And his costume? It would probably be way too big for him, and he'd have to improvise, like using a belt to keep his pants from falling down, which would add to the comical effect.
Well, in such a fanfiction, Naruto would probably be really cute as a baby. His friends might be super confused at first. Sasuke might be a bit less brooding towards baby Naruto. And Iruka-sensei would probably take on a more parental role, making sure baby Naruto is safe and cared for.
Well, in such a fanfiction, Sonic might lose his usual speed and confidence at first. He'd probably be more naive and rely on his friends more. Maybe he'd have to learn basic things all over again, like how to properly control his powers in his new, smaller form.
Well, he might lose all his evil cunning at first. Since he's a kid, he could start to see the world in a more innocent way. Maybe he'll make friends with people he used to terrorize, not realizing who they are. And he could be easily influenced by good-hearted characters, starting to develop a sense of right and wrong that's completely different from his adult, villainous self.