Found all alone as an orphan in the Everfree forest, Shadow Dawn has been living with the royal sisters, princess Celestia and princess Luna for all he can remember of his life. To most ponies that would be heaven, to Shadow it was hell. Being an alicorn might have it's ups, but certainly it has many downs acording to him.
The royal sisters and the staff were nice to him, but it's more of the part of 'being a prince' he hated. He had been annoyed, angry and even to the point where all he felt was rage flowing through his veins.
Shadow Dawn doesn't know any of his past, not even his parents or where he's from. All he knows is that he was found in the Everfree forest as a lost little alicorn orphan.