A plot could be that a magical spell gone wrong makes Sam and Danny age down to babies. Tucker discovers that there's a time limit to reverse the spell. Meanwhile, the two babies are exploring the world in a very different way, seeing things from a new perspective. This could lead to some heartwarming and funny interactions with their families and friends as they all try to solve the mystery of the spell.
One idea could be that Danny and Sam travel back to the founding of Amity Park and accidentally change something small that has huge consequences in the present. For example, they might stop the first settler from building in a certain spot, which then changes the layout of the whole town and where ghosts can enter from in modern times.
A really cool plot could be that Sam is given a rare plant seed by a mysterious figure. When she plants it, it grows into a giant, sentient plant. Danny at first is wary of it, but they soon find out that the plant is actually friendly and has some knowledge about Danny's ghost powers. Together, they use the plant's abilities to fight off a powerful ghost that is threatening their city.
One plot idea could be that baby Danny accidentally wanders into Vlad's lair. Vlad, instead of being his usual villainous self, is surprisingly gentle. He realizes that Danny's innocence might be a chance for him to change his ways. Maybe he tries to mentor Danny in a different, more positive way, teaching him about his ghost powers in a non - malicious manner.
Well, for Danny Phantom baby fanfiction, you could write about Danny having to babysit a baby that has the ability to see ghosts like he does. It would be full of comical moments as Danny tries to keep the baby calm while also dealing with ghosts. Or perhaps a story where Danny discovers a baby ghost in the Ghost Zone and decides to bring it back to the human world to protect it. You could also write a story where Danny's parents find a baby with strange energy readings and Danny has to keep his identity a secret while trying to figure out what's going on with the baby.
One interesting story could be about Danny and Sam going on a ghost - hunting adventure together. They might discover a new type of ghost that has unique powers and they have to figure out how to defeat it using their combined skills.
One idea could be that Danny and Sam have kids in the future and their kids inherit Danny's ghost powers. The story could focus on how they learn to control their powers while also dealing with normal kid stuff like school and making friends. It would be interesting to see how Sam, as a mom, guides them through this.
One possible plot could be that Danny and Sam face challenges in raising their baby while also dealing with Danny's ghost - fighting duties. Maybe the baby inherits some of Danny's powers and they have to figure out how to help the baby control them.
One plot idea could be that they have to deal with the challenges of being young and pregnant while also facing Danny's ghost - fighting duties. Maybe they have to keep it a secret from their families and friends at first, adding a layer of mystery and stress. Another idea is that there could be some sort of ghostly influence on the pregnancy, either positive or negative, which leads to unexpected developments in the story.
One interesting idea could be the origin of the ectoplasm baby. Maybe it was created accidentally by Danny during one of his ghost - fighting adventures. Another idea could be the baby having unique powers that are a mix of Danny's ghost powers and something new related to the ectoplasm. For example, it could have the ability to manipulate ectoplasm in ways Danny can't.
One idea could be that Danny's ghost powers somehow lead to an unexpected pregnancy situation for a female character, and then he has to deal with the responsibilities of being a 'baby daddy' while still keeping his ghost - fighting a secret. For example, maybe a new ghostly enemy targets the unborn child.