In fact it makes me want to try a smaergle for double battles:-Fake Out-Dark Void-???-????
Dark Void Smeargle is nothing new, there is a reason why status-healing berries are very common held items.
How viable do you guys think a Sunny Day team would be? Usually they're overlooked for rain dance because swift-swimmers can also abuse the water buff (unlike cholorophyll users, who rarely have a fire move and never have fire stab), however in this broken metagame they could easily abuse their number 1 advantage: insta-sleep! With no sleep clause, methinks that some chlorophyll sleepers could really destroy this metagame, with support from some fire-type assaults...any thoughts?
A Sunny Day team has the potential to be very effective, but you shouldn't be banking on sleep as one of your primary strategies, for the same reason stated above; while you spend a turn sleeping an opponent, most likely they'll just heal and trounce you in the meantime. Sleep moves are effective against unskilled opponents who most likely won't be prepared, but I'd be willing to say that this year's turn-out will be more skilled than last year's crop.
From what I've noticed from reading warstories from last year and watching double battles, the trend for Sunny Day teams has a Shiftry and Cherrim leading; Shiftry uses Fake Out and Cherrim uses Sunny Day, which activates Chlorophyll and Cherrim's Flower Gift. Moltres and Heatran can serve as good support, and the fourth available team slot is usually a generic sweeper (I've seen Garchomp, Medicham, and Lucario all work fine here). Feel free to experiment with several team layouts to see which works best for you, just be aware that priority moves are also highly popular in double battles.