A simple plot is that the Avenger just stumbles upon the baby in a dangerous situation, like in a war - torn area or a place that has been attacked. They then feel a sense of responsibility to take care of the baby. As they do so, they learn more about themselves and their own capacity for compassion. They might also introduce the baby to the rest of their team, and the team has different reactions, some being very welcoming and others being a bit more cautious.
One common plot could be the Avenger taking on a protective role over the baby. For example, they might keep the baby safe from villains who are after it for some special power the baby has. Maybe the baby is related to some important figure in the Avenger's world. Another plot could be the Avenger trying to find the baby's family while forming a bond with the baby during the search. They could face many challenges along the way, like dealing with other characters who misunderstand their intentions with the baby.
Captain America is a likely candidate. He has a strong moral compass and a sense of protectiveness. He would see it as his duty to take care of the baby. His old - fashioned values would make him a great caregiver, like making sure the baby has a proper upbringing even in the middle of all the chaos in the Avenger's world.
It could be Captain America. He has a strong sense of justice and kindness. So, if he found a dog, he would surely take it under his wing and protect it. Maybe he'd even train the dog to be a mascot for the Avengers.
A common plot is the development of an unlikely bond. Sesshomaru, who is usually cold - hearted, gradually warms up to baby Kagome. Another plot point could be Sesshomaru protecting Kagome from various threats, like other demons or even humans who might see her as an oddity. For example, he might have to fight off a group of demons who sense her spiritual power even as a baby.
The story could start with the Avenger having a bad day. They are feeling really down. Then they find a stray dog. At first, they're not sure what to do with it. But as they spend more time together, the dog's loyalty and unconditional love start to heal the Avenger's emotional wounds. Meanwhile, they also discover that the dog has a connection to an old enemy, which leads to a new adventure.
One common plot is that Snape discovers baby Harry after the death of his parents and decides to secretly protect him. He might use his skills in potions and magic to keep Harry safe from the dark forces that are still after him. Another plot could be Snape finding Harry in a more accidental way, like during one of his forays into the Forbidden Forest. He then has to decide what to do with the baby, knowing his complex relationship with Harry's father.
One common plot could be Chloe publicly embarrassing Marinette. For example, she might spread false rumors about Marinette at school, which could lead to Marinette losing some friends. Another plot could be Chloe trying to sabotage Marinette's attempts at winning a design competition. Maybe she hides Marinette's supplies or tries to steal her ideas.
A really popular Avenger fanfic series is the one that takes the team to different dimensions. It's exciting because it not only shows new versions of our favorite heroes but also new villains. The author does an amazing job of world - building in these different dimensions, making it a very immersive read.
Well, in these fanfics, a frequent theme is survival. Being reborn as a baby in the Pokemon world means having to figure out how to get food, shelter, etc. There's also the theme of mystery. The character might be reborn with some sort of special ability or knowledge that they don't understand at first. And of course, friendship is a big one. The baby character makes friends with other trainers or Pokemon, and these relationships are central to the story.
One interesting plot could be their first encounter as babies and how they seem to have an instant connection, like they recognize something special in each other. Maybe they reach for each other's hands or stare at each other in a really cute way.
Teamwork is also a very common theme. In these crossovers, the characters have to learn to work together quickly. They come from different backgrounds and have different ways of doing things. In a 'Avenger crossover fanfic' where they cross with the Guardians of the Galaxy, the Avengers' more structured approach has to mesh with the Guardians' more free - wheeling style. This theme of finding common ground and working towards a common goal is often explored in great detail. It usually involves a lot of character development as they overcome their initial differences and start to trust and rely on each other.