Trying to catch up on OC-Posting! Here's Chester, a Chesnaught-turned-human living in Kanto!
After a Flygon mistakenly took his egg to her nest, he grew up with a Trapinch and they became adopted brothers very quickly. Due to development happening in Kalos, the Flygon took both of them to the desert north of Kanto and Johto, where they evolved into their final forms in relative peace.
However, they learned that life as fully evolved wild Pokemon had its troubles, especially with Trainers. They made their way to the Ruins of Alph and made a wish to be human so they could live peacefully. Their wish was granted, at the cost of them being unable to use most of their moves, and they cannot speak the human language.
That said, Chester found a way to live in society, taking up ninja training from Janine to use what abilities he did retain, such as his super strength and the ability to form a spiky shield from his arms. For other forms of offense, Janine trained him in the art of the triple flail. He keeps his dominant leg and foot wrapped in sports tape for better grip and protection in fights, keeping his left foot bare for easier pivoting. For work, he often undertakes mercenary tasks, hunting down criminals across Kanto and Johto.