There's a fanfiction where a young boy becomes a Lucario. In this story, it explores his journey of adapting to his new form. He has to learn how to use his newfound speed, strength, and aura - reading abilities. It also delves into how he interacts with other Pokémon and humans in his new state.
You can try websites like FanFiction.net or Archive of Our Own (AO3). They have a large collection of fanfictions across various fandoms, and you're likely to find some 'human becoming Lucario' stories there.
A common theme is friendship. Lucario and the human character often start off as strangers or in a situation where they need to learn to trust each other, like in many stories where a trainer catches a Lucario and they gradually become best friends through their shared experiences.
The theme of growth is quite prevalent. Both the human and Lucario grow as individuals as their relationship progresses. They become more empathetic, more self - aware. And of course, the theme of forbidden love is often there too. Since it's not a typical relationship in the Pokémon universe, it can be seen as something that goes against the norm, which adds an element of drama and tension to the story.
There's also 'Lucario's New Path with a Human Friend'. In this fanfiction, a young human stumbles upon an injured Lucario and nurses it back to health. Their friendship then blossoms as they embark on adventures, exploring the uncharted regions of the Pokemon realm and learning about each other's strengths and weaknesses. This story really delves into the emotional bond that can form between a human and a Pokemon like Lucario.
A common theme is friendship that evolves into something more. The human and female Lucario start off as comrades in some adventure or task within the Pokémon world, and over time, their bond deepens romantically.
One popular 'lucario and human love fanfiction' is 'A Bond Beyond Species'. It beautifully depicts the relationship between a trainer and their Lucario, gradually evolving into a deep, affectionate bond that transcends the normal trainer - Pokémon connection.
One aspect could be Connor's struggle with emotions. As he becomes human, he has to deal with complex feelings like love, fear, and anger for the first time. He might find it difficult to understand and control these emotions, leading to some interesting internal and external conflicts in the fanfiction.
One place to start looking could be fanfiction.net. There are often various works in the Pokémon fanfiction section that might include 'female Lucario x human' scenarios. However, the quality can vary greatly, so it's important to read reviews or summaries before delving in.