Maybe a story about a human who accidentally stumbles into the hidden realm of Legendary Pokemon. There, they form a friendship with a Legendary that is an outcast among its kind. Together, they try to change the perception of the outcast Legendary in its own community while also finding a way for the human to return home.
Mewtwo is also very popular. Given its origin as a genetically - engineered Pokemon, a human could interact with it in many ways. Maybe a human scientist wants to study Mewtwo further, or a young trainer tries to befriend Mewtwo and help it come to terms with its existence and powers.
One common theme is friendship. Humans and Legendary Pokemon often form deep bonds of friendship in these stories. Another theme is adventure, as they usually go on exciting quests together.
Well, start with a strong concept. Imagine a world where Legendary Pokemon are hunted, and a small group of humans are trying to protect them. One of the humans forms a special bond with a Legendary, say Zekrom. The key is to build the relationship gradually. Show how the human and Zekrom learn to communicate, maybe through shared experiences or a common goal. Also, don't forget about the setting. Describe the environments where they interact, like a hidden cave filled with ancient Pokemon markings that holds a secret related to the Legendary Pokemon's power. This will make the fanfiction more immersive.
There are also original characters created by fans. These characters are often designed to have a unique backstory that ties them to Legendary Pokemon. For example, a character who was orphaned by a battle between two Legendary Pokemon and now has a vendetta against one of them, or a character who has a prophetic dream about a Legendary Pokemon and goes on a journey to find it.
One interesting storyline could be a human with a special bond to a Legendary Pokemon. For example, a trainer who discovers they have an ancient connection to Mewtwo. They might go on a journey to understand this connection and in the process, face challenges from other trainers or organizations who want to use this connection for their own gain.
Well, 'The Legendary's Choice' is an interesting piece of 'human legendary pokemon fanfiction'. In this story, a human is chosen by a Legendary Pokemon to embark on a journey to save the Pokemon world. It has a great plot with lots of character development. Also, 'Legendary Allies' shows how humans and Legendary Pokemon team up against a common evil, and it's full of exciting battles.
I really like the fanfic 'The Legendary's New Form'. It shows how the legendary pokemon adapt to their human forms in a modern human society. It has some really cool action scenes and the relationships between the characters, both human and pokemon - turned - human, are very engaging.
A plot could involve a human accidentally stumbling into the hidden realm of Legendary Pokemon. There, they have to prove themselves worthy to the Pokemon and in the process, they develop a unique friendship. The human then uses this new - found relationship to bring peace between humans and Legendary Pokemon who have long been in conflict due to misunderstandings.
Lemon fanfictions often involve inappropriate content, and creating or promoting such content involving Legendary Pokemon and humans is not ethical. Pokemon are fictional creatures aimed at a wide audience, including children, and this kind of combination in a 'lemon' context violates the spirit of the franchise.