I thought the same as the previous poster and decided to build a team around Zoroark and its Illusion ability.
Sticky Webs Zoroark:
Honestly, this is a bit of a gimmick team and I'm afraid that by sharing it here its effectiveness could take a hit. BUT I've had a lot of fun with it, and even managed to hit top 20 on the ladder (under my Should I stay in? alt), so I thought I'd share it anyway.
This team is all about making the opponent second guess themselves. Sticky Webs turn Guts Ursaring into a devastating attacker and force the opponent to stay on their toes whenever you manage to get them up. I love Spidops because of its surprisingly strong First Impression which often catches people off guard and because of its ability to force non-ghost-type set-up sweepers to switch out with the help of Circle Throw.
Drifblim is a potential candidate for Illusion, though definitely not my favorite. Its main role is that of a defensive anchor that can also remove the hazards which can often give your Zoroark away.
My absolute favorite part of the team is the synergy between Zoroark and Toxicroak. Nine times out of ten, I will disguise Zoroark as Toxicroak. I decided to use Zoroark's weaker attack stat with Swords Dance + Sucker Punch just because people would probably expect to see that on the actual Toxicroak. The Illusion wouldn't even break after using Sucker Punch seeing as they can both learn that move. I took the same approach with Toxicroak and gave it Nasty Plot, which gave me the excuse to use one of my favorite priority moves: Vacuum Wave. Even though I decided to make a physical Zoroark and a special Toxicroak, you could totally flip them. Nasty Plot Zoroark can give the team much-needed fire coverage with Flamethrower while Swords Dance Toxicroak is just insanely strong and has a lot of cool coverage options. You could also just run Specs Zoroark for the immediate damage. Whatever you do, these two just go really well together given that Zoroark is immune to the Psychic attacks that Toxicroak fears while Toxicroak can switch into the fighting (and water) type moves that would threaten Zoroark. Very fun combo.
As for Krookodile, it's just there because I wanted a ground type. It is definitely quite threatening when under Sticky Webs as Moxie allows it to snowball out of control pretty fast. Stealth Rocks are nice when you can get them up. You could probably use another strong physical attacker but I definitely wouldn't swap its ability for Intimidate as that gives away the fact that it isn't a Zoroark (on the off chance that you ever find it necessary to do that).
So, that's the team. I hope you'll try it out and experiment a bit with the Zoroark and Toxicroak sets!
P.S. If you see me on the ladder, I'm definitely NOT disguising Zoroark as Toxicroak, that would OBVIOUSLY be very dumb :)
Edit: Spelling