Strangely enough, there’s been no record of any such occurrence outside of a handful of urban legends.
Or, perhaps, not so strangely enough, as if there were a ditto or zorua/zoroark courting humans, we would really know about it? 😉
A zoroark wrote this answer.
You know, I’ve always had my suspicions about Bill… —LH
I’ll neither confirm nor deny a thing here. —Bill