His personality could become more irreverent. Naruto is typically respectful of his elders and the ninja hierarchy, but Deadpool's influence might make him question and joke about those things more.
He would likely become more irreverent. Naruto is usually quite earnest and determined, but as Deadpool, he'd be cracking jokes all the time, even in serious situations. With Fem Kyuubi around, he might tease her constantly. For example, he could make fun of her tails or her sometimes - haughty attitude. His sense of morality might also shift a bit, becoming more in line with Deadpool's grey - area ethics.
Naruto is known for his bright and positive personality. But if he becomes Davy Jones, he might become more brooding. Davy Jones was a complex and often melancholic character. Naruto's usual cheerfulness could be replaced with a sense of solemnity as he grapples with his new identity and the powers that come with it.
His positive and determined personality would turn into a cynical and cruel one. He might lose his sense of justice and become self - centered.
Well, Naruto's personality would have an interesting transformation. He would likely become more of a risk - taker. The pirate world is full of uncertainties and dangers, and Naruto would embrace this. He might become more laid - back in some ways, enjoying the simple pleasures of life at sea like drinking grog (if they have something similar in this fanfiction world) and singing sea shanties. But at the same time, his competitive nature would still be there. He'd want to prove himself as a great pirate, perhaps competing with other well - known pirates. His naivete might also change a bit. While he was often naive in the ninja world, the harshness of the pirate life would make him more street - smart, yet still retain his positive outlook on life.
In this fanfiction scenario, Naruto's transformation into a Joker fan could lead to some significant changes. Naruto has always been about friendship and protecting his village. But as a Joker fan, he might start to see the flaws in that system. His new - found admiration for the Joker could make him view the power structures in the ninja world as something to be toyed with. He could use the Joker's unpredictability to his advantage in battles, confusing his opponents. However, this would also put him at odds with his friends and the village elders who uphold the traditional values.
He might become more brooding and less open. Harry has always been a bit of an open book, but Vader's influence could make him more withdrawn as he contemplates power and the dark side.
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.
He might become more cunning. Just like a fox, he would be able to outwit his enemies more easily. He could use trickery and deception in battles, setting traps for his opponents.
He might become more brooding. The new powers and the vampiric nature could make him a bit more withdrawn as he tries to understand and control his abilities. But his core of kindness would still be there.
His confidence would likely soar. Naruto has always been confident, but as the Sorcerer Supreme, he'd have an even greater sense of self - assurance. He'd know he has the power to protect and make a difference on a much larger scale. He might also become more reserved in some ways, as he'd have to deal with more serious magical matters and might not be as quick to jump into action without thinking first.