It might be due to a miscommunication. Humans and Pokemon don't always understand each other perfectly. If the Legendary Pokemon misinterprets human actions as hostile, it could lash out. For example, if a group of humans are doing some large - scale construction near its home and it thinks they are about to invade, it may attack.
Some fanfics might explore the idea of a Legendary Pokemon being corrupted. Maybe it was exposed to some dark energy or magic that warped its mind and made it view humans as something to be eradicated. This could lead to a very dark and dangerous situation for the human characters in the fanfic.
One possible scenario could be that a misunderstanding leads a Legendary Pokemon to view humans as a threat to its territory. For example, if humans are constantly exploring and disturbing a sacred area where the Legendary Pokemon resides. Another could be that the Legendary Pokemon is being controlled by an evil force which drives it to attack humans.
Maybe humans have been over - capturing Pokémon without considering their well - being. In the fanfic, this could lead to Pokémon feeling like they are just objects to be collected. So they start to hate humans.
Giratina is also quite popular. Its 'banished' status in the Pokemon lore gives it a lot of depth. As a human in fanfic, it can be a brooding and misunderstood character. People are drawn to the idea of exploring its redemption arc or its unique view of the world, being from the Distortion World.
One interesting concept could be how the legendary Pokemon's unique powers translate into human abilities. For example, a Mewtwo as a human might have extraordinary psychic powers that manifest in ways like telekinesis and mind - reading. Another concept could be their relationships with other humans and Pokemon. They might struggle to fit in or be revered because of their 'legendary' status.
If Ash becomes a legendary Pokemon in a fanfic, it would change the whole Pokemon world dynamic. He might be hunted by evil organizations who want to use his power. On the other hand, he could also use his new form to protect the Pokemon world better than ever. His friends would likely have a mix of reactions, from being amazed to being worried about losing the old Ash.
The world would be very different. There would likely be a complete shift in power dynamics. Instead of humans being in control, Pokemon would be the rulers. Cities and towns might be restructured to serve Pokemon needs, with humans doing all the laborious tasks.
Humans would probably be very scared at first. They would see these strange creatures and not know what to do.
There are several reasons for a Pokemon fanfic to be rejected. If the story is too derivative and lacks creativity, it won't stand out. For instance, if it's just a rehash of an existing Pokemon adventure without adding anything new. Additionally, if the fanfic violates any copyright laws, perhaps by using unauthorized Pokemon designs or concepts from other sources, it will surely be rejected.
Goku's power is measured in different forms and levels in his universe. When it comes to Legendary Pokemon, some of them have the ability to control elements like time and space. In a fanfic, Goku in his Super Saiyan Blue form might be able to match the power of a Legendary Pokemon like Palkia, which has power over space. But it also depends on the situation. If Goku is in an environment where his Ki attacks are less effective, like in a dimension where psychic powers are dominant, he might have a harder time against a Legendary Pokemon like Lugia. Overall, it's a complex comparison as their powers are quite different in nature.
In Ash's adventures in legendary Pokemon fanfics, he often has extraordinary encounters. For example, he might form unique bonds with legendary Pokemon that are not part of the main canon. These fanfics can take his story in new and exciting directions, like having him team up with a Mewtwo in a way that defies the normal Pokemon - trainer relationship. It's all about exploring the untapped potential of his character in the context of the amazing world of legendary Pokemon.