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.
Well, in his cat form, Pitch Black could become more territorial. He might hiss at other animals or people who come too close to his 'domain'. His once menacing presence could be translated into a more stealthy and watchful nature. He would still be cunning, but now he would use his cat - like abilities to his advantage, like sneaking up on things. And perhaps his patience would increase, as cats are known to wait for the perfect moment to pounce.
If turned into a kid, Deadpool's personality would lose some of its edge. He'd be more impulsive in a child - like way, not thinking about the consequences as much as he does as an adult. His love for chaos would remain, but it would be more like a child's playfulness. He might also be more vulnerable in a sense, showing emotions more openly like a kid does.
His personality would be a mix of his old self and the influence of being a ghoul. He would still be the brave Naruto who wants to protect his friends and village. But at the same time, he'd have to constantly fight the more primal and aggressive instincts that come with being a ghoul. This internal struggle could make him seem moodier at times, as he tries to balance his two natures.
His personality might become more reserved. As a sphinx, he'd be more of an observer, so he might think more before acting, which is different from his sometimes impulsive nature as a human. He could also become more patient, as sphinxes are known for their calm demeanor.
He'd probably be more innocent. The snobbish and often cruel Draco we know would be replaced with a more naive and curious version. He might not have the same prejudices as he does as a teen or adult.
He might become more empathetic. Since society often expects different behaviors from females, he could start to understand the feelings of others better. For example, if he was previously dismissive of the pain of civilians in war, as a female, he might start to feel more compassion.
His personality might become more curious, like a cat. He could be more easily distracted by shiny things or new scents. Also, he might become a bit more independent, as cats tend to be, but still hold onto his strong sense of justice and protectiveness for his friends.
Naruto might become more calculating. Since Mewtwo is very intelligent and has powerful psychic abilities, Naruto would have to use his mind more. He would think before acting, unlike his impulsive self in the original series. This change could make him a better strategist in battles, but it could also lead to misunderstandings with his friends who are used to his more straightforward and impulsive nature.
Naruto's personality could shift towards being more reserved. As a Shinigami, he has to deal with the weight of handling souls and the concept of death. This could make him think twice before acting impulsively like he used to. He may also develop a more empathetic side towards those who are about to die or have lost loved ones, as he now has a closer connection to the afterlife.
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.