Provenance.

A turbulent young renegade is made an enemy of the World by scorning its ideals with an act of arson on an important facility, in the name of a cryptic truth gradually revealed to him. Meanwhile, with her family murdered and no one to turn to, a certain pokémon follows him. Pursued from all sides and facing constant threats, their decisions are tested; changing their lives forever. Also on FFN, A03, Wattpad or Royal road (they have italicized text...)