In the fanfiction, it could start with Sasuke being in a strange place and suddenly getting turned into a baby. His memories are still there but he can't communicate as well. His friends find him and are shocked. They then start a journey to find out who did this to him. Along the way, they face many challenges. Naruto might try to teach baby Sasuke some basic things like how to walk again. Sakura would be the one making sure he's clean and fed. And they'd all be constantly on the lookout for any clues to turn Sasuke back into his normal self, while also having some really cute and funny moments with baby Sasuke.
Well, one possible plot could be that his friends have to take care of him. Naruto might be really confused at first but then becomes super protective. Sakura could use her medical skills to make sure baby Sasuke is healthy. And they all have to figure out how to turn him back to normal while also dealing with the chaos that a baby brings.
The Akatsuki might be the main antagonists. They might think that a baby Sasuke is easier to capture and they could use him for their own purposes, like extracting his Sharingan or something else related to his power. They would be a great threat as they are powerful and cunning.
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.
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, one possibility could be that a magical spell goes wrong in the world of the fanfiction. Maybe a young wizard was trying to do a simple transformation spell near Nico and it backfired, turning Nico into a baby. Then, his friends have to figure out how to reverse the spell. They might start by looking for ancient books in a hidden library that could hold the key to the solution.
Well, perhaps an enemy uses a magic spell to turn Zoro into a baby as a way to weaken the Straw Hat Pirates. At first, the crew is in chaos trying to deal with a baby Zoro. But as time passes, they see that baby Zoro has a pure sense of determination. He still tries to train, albeit in a very clumsy and cute way. And in the end, they go on an adventure to find the antidote to turn him back, with lots of comical and touching moments along the way.
One idea could be that a powerful magic spell backfires on Ash. His friends then have to take care of baby Ash while trying to find a way to reverse the spell. They might face challenges like getting baby Ash to eat Pokémon food or stop him from toddling towards dangerous Pokémon.
Well, one possible plot could be that the other characters in the Solangelo universe are super confused at first. Percy might be all like 'Whoa, a baby Nico?'. They'd have to figure out how to take care of him. Maybe Will is the most determined to find a way to turn him back and in the process, there are some really cute and funny moments like baby Nico trying to grab Will's stethoscope and put it in his mouth.
One possible plot could be that his friends have to take care of him while trying to find a way to reverse the transformation. They might struggle with things like feeding him, changing his diapers, all while protecting him from enemies who could take advantage of his vulnerable state.
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.
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.