In a fanfiction scenario, Ash might be in a situation where he has to use a unique Pokeball to catch Lugia. The Pokeball could have some sort of special power, like being able to withstand Lugia's powerful attacks. Ash would have to figure out how to use this Pokeball effectively while also respecting Lugia's might and the bond that Lugia has with the sea.
I'm not sure specifically what the 'dead pokeball sad story' is. It could be about a Pokeball that has malfunctioned or been damaged beyond repair, and perhaps there was a Pokémon inside that was affected in a sad way. Maybe it was a crucial Pokeball in a trainer's collection and its failure led to the loss of a beloved Pokémon.
First, create unique Pokemon characters. Give them distinct personalities, like one being shy and another being bold. Then, build a believable relationship between the trainer and the Pokemon harem. The trainer should have qualities that attract the Pokemon. Also, add an interesting setting, such as a new region full of strange Pokeballs and rare Pokemon. Plot twists are important too. Maybe the Pokeballs start to malfunction and the Pokemon have to figure out how to stay with the trainer without being caught again.
Imagine a fanfiction where Ash is exploring an uncharted island. On this island, he finds a Pokeball half - buried in the sand. The Pokeball seems to be made of an unknown material. As he picks it up, a strong gust of wind blows, and he hears a faint cry that sounds like Lugia. He starts to study the Pokeball and realizes that it has a hidden power. This power is related to Lugia's origin. Ash decides to find Lugia using the clues from the Pokeball. As he gets closer to Lugia, he has to face his own doubts and fears. He also has to deal with other Pokemon and trainers who are also interested in the powerful combination of the Pokeball and Lugia.
Often, the main character is the human who gets captured. They can be an ordinary person from our world who is suddenly thrust into the Pokémon universe and the strange situation of being inside a Pokeball.
Another concept is the relationship between the captor and the captured human. It's not just a simple master - servant relationship. There could be a lot of emotional complexity. The captor might feel guilty or conflicted, and the human might try to find ways to either escape or form an unexpected bond with the captor.
Well, a possible plot in Pokemon Pokeball Harem Fanfiction is that a young trainer discovers an ancient Pokeball. When he uses it, it releases a group of Pokemon that are from a long - lost species. These Pokemon are very intelligent and form a harem around the trainer. They start to help the trainer in his journey in unexpected ways, like guiding him to hidden areas filled with valuable items or teaching him new battle strategies that no one else knows. The trainer has to manage this unique group while also dealing with other trainers who are jealous of his special Pokemon.
Well, it could be that Ash gets caught in the Pokeball by accident. Once inside, he might start to understand the feelings of Pokemon when they are captured more deeply. He could try to figure out a way to escape, and in the process, learn some secrets about how Pokeballs work that he never knew before.
It could be a mischievous Pokemon. Maybe a Ditto that has gone a bit wild and accidentally turned into a Pokeball and then somehow 'captured' Ash when he touched it.
A trainer named Lily had a Pokeball that she used to keep her starter Pokémon in. This Pokeball was with her since the very beginning of her journey. One fateful day, she entered a mysterious cave filled with strange energy. Unbeknownst to her, this energy was affecting her Pokeballs. Her starter Pokémon's Pokeball started to act up. It began to glow dimly and then just went black. It was dead. The Pokémon inside was in a state of confusion and panic. Lily tried everything to revive the Pokeball but to no avail. She was devastated as she had a deep bond with her starter Pokémon, and now she was afraid she might lose it forever.