A really interesting plot could be that Naruto turning into a baby causes a time - warp effect. So not only is he a baby, but the whole world around him is also in a different time period. This would make for a really wild adventure as his friends have to navigate this new - old world while taking care of baby Naruto.
Maybe in the fanfic, Naruto's baby form has some unique abilities that his older self didn't have. This could attract the attention of some secret ninja clans who want to study him. His friends, like Sasuke and Sakura, would have to protect him from these clans while also trying to figure out how to turn him back to normal.
One possible plotline could be that all of Naruto's friends have to take care of him. They struggle with things like changing his diapers and getting him to eat. Another could be that his enemies try to take advantage of his baby state but underestimate his still - present ninja skills. For example, even as a baby, he might be able to use some basic chakra moves to defend himself.
Another plot could involve Aladdin's relationships. As a girl, his friendship with Abu might change. Abu could be more protective of her. Also, his relationship with Jasmine would be very different. They could become sisters - like or Jasmine could be jealous of this new female Aladdin who might attract the attention of other men in the kingdom.
Well, perhaps in the fanfiction, Canada turns into a baby due to some magical mishap. The nations have to search for a way to turn him back. Meanwhile, baby Canada is just exploring the world around him innocently. He might crawl over to England's tea set and accidentally break a cup, leading to England's typical over - reaction.
One possible plotline could be that Naruto is hit by a strange jutsu that causes him to transform into a full - grown man overnight. He then has to deal with the physical and mental changes while still trying to protect the village. His friends might be initially shocked but then support him as he figures out how to reverse the transformation.
A great plotline could be Sasuke trying to raise Naruto while also dealing with his own inner demons. He might see Naruto as a chance for redemption. Sasuke could introduce Naruto to the Uchiha heritage in a positive way, teaching him about things like the Sharingan even though Naruto doesn't have it. And there could be heartwarming moments of Sasuke reading bedtime stories to Naruto that are actually about the great Uchiha warriors.
Well, a really interesting plot twist could be that the transformation into a little girl is part of a genjutsu cast by a powerful enemy. But while in this form, Naruto discovers new aspects of the ninja world that are usually hidden from male ninjas. Maybe there are secret female - only ninja techniques she stumbles upon and has to master to break the genjutsu.
In a fanfic, Percy could turn into a dragon as a result of a strange experiment gone wrong. His friends at Camp Half - Blood are initially scared but then realize they need to help him. Percy, in his dragon form, has to deal with his new instincts while also trying to communicate with his friends. They might need to find a way to communicate telepathically. As he gets more used to his form, he could use it to explore parts of the mythical world that were previously inaccessible to him.
Perhaps there could be a plot where Naruto and Tenten discover a new form of training. They accidentally stumble upon a hidden area in the forest where the chakra flow is different. Together, they figure out how to use this new environment to enhance their skills. Naruto might learn some precision from Tenten while she could gain some of his tenacity when it comes to training.
A great plotline could be England turning into a girl and then trying to prove that she is still as capable as before. She could participate in a series of challenges or competitions among the nations, like a cooking competition. Since she has a long history of certain culinary traditions, she wants to show that her gender change doesn't affect her skills. Meanwhile, her relationships with her old rivals like Spain could also take on a new dimension. They might be more hesitant to be as aggressive in their rivalries as they were before.
One possible plotline could be Kushina's daily life taking care of baby Naruto. She might be shown singing lullabies to him, or just watching him sleep with a loving look. Another could be about Naruto showing early signs of his ninja abilities as a baby, like accidentally using chakra in a cute way while Kushina tries to figure out what just happened.
A plotline could be Tsunade trying to reform the medical ninja system in the village. There could be corruption or inefficiencies that she wants to address. This would involve her facing opposition from some of the established medical ninja families. She would have to use her authority as the Hokage to push through changes that would ultimately benefit the village in times of war and peace.