Whenever you throw a pokeball at a trainers pokemon, they always block it and say "Don't be a theif!"
This also applies to N. But this is very interesting.
If N was a Zoroark, when he tries to block the ball, the ball instead would've tried to capture him, as it made contact with him.
But it doesn't, it just bounces off of him. This proves N is not a zoroark.