Venomoth (F) @ Life Orb
Trait: Tinted Lens
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Sleep Powder
- Quiver Dance
- Giga Drain
- Bug Buzz
Here's the set I run on my semi Volt Turn team, not as a Baton Passer, but as a sweeper, and it does quite well. Volt Turn allows Venomoth to easily come in on a slower pokemon (base 90 is actually quite decent, outspeeding threats like Nidoking and Suicune) and put it to sleep. From then, you can sweep with a Quiver Dance or two. It's not that easy, because the omnipresent Scarf Flygon, Victini, and Darmanitan all outspeed and OHKO it at +1, but if those threats are eliminated, or your opponent slips up and lets you get to +2, it might as well be GG. +2 Tinted Lens Bug Buzz just about OHKOes everything in the tier that doesn't have massive special bulk. And since you really don't need coverage with Tinted Lens, you can run Giga Drain to heal Venomoth from all that Life Orb damage.
Bulky waters may be able to take a hit or two, but can do little in return. Even if they can phaze you out, you can heal with Giga Drain and hopefully come in another day. Really, the only common counter that isn't scarfed is Snorlax, who can take a Sleep Powder, isn't 2HKOed by +2 Bug Buzz, and OHKOes with Body Slam.
Now, it's actually hard to get to +2 against a decent opponent. So at +1, Venomoth is a quite a bit weaker, and especially a lot slower, easily checked by only a few, albeit very common pokemon. It also misses out on a few key OHKOes by just a couple %, which hurts. And I'm not going to even go into its horrendous physical bulk (although after a Quiver Dance it can actually take Heat Wave from a Zapdos).
Venomoth is quite an effective pokemon, and with the proper team support, can wreck through entire teams.
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I also run a Life Orb Zoroark on the same team, and it certainly does increase the pressure on the opponent dramatically. Sucker Punch is great for taking down Chandelure and heavily weakened Flygon, and Dark Pulse and Flamethrower have good coverage and power. And as always, U-Turn is great for scouting and grants you a ton of momentum. Illusion is a brilliant ability, but only if you play with it craftily and cleverly, much like Zoroark it is itself.
Can't wait for the next round of pokemon.