Vinyl Scratch.

You can have OC's in Equestria empire, they just have to be AS IF they were actually canon, so in other words, no grim dark, no super powered OC's that can shoot lighting and breath fire, none of that sort of thing, they have to be made as if they were actually canon.

Ahh I see, this seems like a fun challenge

If you would like non Canon then you go this:http://mlpforums.com/forum/22-roleplays/

Anywho, hard to have an OC that isn't one of the things that I mentioned? :3