This was a prompted fic for an OC fighting competition.
Here is the link to the thread.

An up and coming mixed martial artist by the name of Crimson Luminance seeks out a professional boxer to test his mettle against a seasoned competitor. And when Crimson finds his opponent at Ponyville's bar, he just can't resist the chance to challenge him.

Nico, a human from Earth is being blamed for a crime that his ancestors committed. The dragons that once resided on Earth now want retribution, and his head. They give Celestia an ultimatum, either she gives him over, or they take him. Nico proposes a solution. A debate, to decide the innocence or guilt of his entire race. He believes that he can convince them of humanity's changes for the better. He will be set against an opponent who has been brought up her entire life to hate his kind. His life rests in his words, and he must convince an entire race to release a hundred thousand year old grudge.