Well, perhaps the concept of how the relationships between the characters change. In the fanfiction, they could have to rely on each other more than ever in this new, minuscule state. For example, they might have to work together to find food or shelter which were previously easily accessible. And also, the idea of how they adapt to their new physical limitations and the challenges that come with it, like being able to climb up a small pebble which is now like a mountain for them.
In the original story, the focus was mainly on the adventure of being shrunk and the family - centered plot. However, in the adult fanfiction, it may introduce elements like different power dynamics. For example, the shrunken characters might face different social hierarchies among themselves in this new state that were not present in the original. Also, the adult fanfiction could have a darker or more nuanced tone, exploring themes like survival in a more gritty way compared to the relatively light - hearted original.
Well, without more details about the specific 'the day i shrunk story', it's hard to say exactly. Maybe there were some strange scientific experiments involved that led to the shrinking. Or perhaps it was some sort of magic. It could also be that there was an encounter with a strange substance that caused the shrinking.
One idea could be that the shrunken kids discover a tiny, hidden civilization in the backyard. They have to work together with the mini - people to find a way to be restored to their normal size. Another could be that the kids are shrunken while on a family vacation and they have to navigate a strange and new environment filled with different kinds of bugs and small creatures.
The kids themselves are often the most popular. Their reactions to being shrunken and their attempts to get back to normal size are full of potential for interesting stories. For example, the eldest kid might take on a leadership role among the shrunken siblings.
I'm not sure as there's not enough information given. It could be just an ordinary person who is the main character and experiences this strange shrinking.
It could be a new, mischievous minor god or goddess. Maybe a god of miniatures who is jealous of Percy's fame and decides to shrink him as a prank. Another possibility is a rogue magician or sorcerer who has a vendetta against demigods and specifically targets Percy to make him less of a threat.
You can try looking for it on popular fanfic websites like FanFiction.net or Archive of Our Own. These platforms usually have a wide range of Pokémon fanfics, so there's a good chance you'll find it there.
Maybe your family stories are so full of high expectations or past glories that you feel small in comparison. For example, if your family always talks about a very successful relative, you might feel like you can't measure up.
The 'Shrunk Man Story' might be a unique and creative narrative. Maybe it's a story where the man is shrunk and then has to face all kinds of challenges in a world that has suddenly become huge compared to him. He might have to deal with normal things like a simple ant becoming a dangerous creature, or trying to find a way to get back to his normal size. It could be a story full of adventure and self - discovery.