This is a side-story to Planned Ponyhood
There is a lot to a name. Names have power. Why Luna giving into her inner demons changed her name for a thousand years to Nightmare Moon. Being aware of the pain of losing a name, Luna is all to aware of how fitting a punishment it can be for the worst of crimes. It's almost enough to satisfy her anger over what befell poor Twilight.

Written at the request Speedy Silverstreak, this admittedly short story was written in my nightly stupor of putting off sleep and worrying about a test in the morning shall hopefully allow you to rest more easily knowing the fate of this scoundrel.