Well, one interesting plot could be that all his friends have to take care of him. They might struggle to train him as they did before because he's just a baby. Another could be that his enemies don't recognize him at first and underestimate the baby Naruto, but then he still shows some of his ninja skills in a very cute and unexpected way.
Sakura could be a main character. She might be the one who takes on a motherly role towards baby Naruto. She'd be very protective and try to teach him basic things. Kakashi could also be important. He'd use his wisdom to figure out how to deal with this situation and also keep an eye on Naruto's safety.
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.
Iruka - sensei would be a likely candidate. He has always been like a father figure to Naruto, so he would probably step up and take care of baby Naruto.
Well, the plot could involve Naruto having to adjust to a whole new world of being a girl. Maybe she'd struggle with the different social expectations in the ninja world. For example, she might face different treatment from her male friends like Sasuke and Kakashi. She could also have to deal with new physical limitations or advantages that come with being a girl, like different fighting styles that might be more suitable for a female body.
Well, one possible plot could be that Naruto, as a girl, would face different challenges in the ninja world. Maybe she'd have to deal with new forms of discrimination or different expectations. For example, in the male - dominated ninja society, being a girl might limit her access to certain training or missions at first. But she could use her determination and unique skills to break through these barriers, just like she did as a boy. And perhaps there would be new romantic interests for her, as her relationships with characters like Sasuke or Kakashi could take on a whole new dynamic.
It could be an old rival of the Malfoy family. Maybe a wizard whose family was wronged by the Malfoys in the past. This wizard has been biding his time, waiting for the perfect opportunity to strike. Turning Draco into a baby is his way of getting revenge on the family, making them look weak and powerless.
Perhaps it's a prank gone wrong. A group of Gryffindors, thinking they could teach Draco a lesson, cast a spell on him that they thought would just embarrass him. But instead, it turns him into a baby. Now, Hermione, being the brilliant witch she is, feels responsible for finding a cure. She starts researching in the library, while Ron is left to keep an eye on baby Draco. Ron has no idea how to take care of a baby, and there are lots of comical moments as he tries to feed Draco and keep him from crying.
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.
Maybe it starts with a strange magical experiment gone wrong in Hogwarts. Harry is curious and gets too close, and suddenly he's a baby. The story could then focus on how the teachers, especially Dumbledore, deal with this situation. They might try to figure out if this is a new form of dark magic they haven't seen before. And Harry, as a baby, would have no memory of who he is, so it could also be about his friends trying to make him remember bits of his past life.