[@Princeofhearts]
Yeah, but Superboy was a clone. The DNA didn't really work in his favour, so he could super jump, but not fly.
So if Kadar is a Kryptonian, I think his abilities make sense. He just wouldn't have them mastered or anything, you know?

edit ;; I forgot about the heat vision - I've been rewatching Young Justice, and I don't think he had that, either. Not sure about the breath, though.