So basically, any team that has Zoroark automatically broke Species Clause. :naughty:
I guess they could program a skip in the animation, but that would still make it obvious because you didn't do anything that turn. It just went from Jigglypuff... to Jigglypuff. No attack, no switching out, and in a WiFi battle, you have to do SOMETHING every turn.
In all fairness, it seems like Zoroark was wholly intended to be a lead, which is why it copies the second Pokemon in the party as opposed to, say, the first, which would make more sense otherwise. As a lead, no one will know what your team consists of yet so it won't be so obvious yet. From there its just a matter of hoping your Illusion isn't broken by whatever breaks, and not switching your Illusion and the copied Pokemon consecutively. Too bad Stealth Rock damage and abilities can really give it away...
It really should have copied one of your opponent's Pokemon, really, not your own. Since that way, you'd know one Pokemon on your opponents team if your lucky and its not the lead. Which seems like it would be more beneficial.