Drought Virizion: This was my idea, so I'll try to avoid bias. With Drought, Virizion received two buffs. The first one that immediately comes to mind is Synthesis, now recovering 2/3 of the user's health, so you can use a Heat Rock and Synthesis will make up for the lack of Leftovers, thus making the sun last in more ways than one. The second is Solarbeam, so now you have a powerful weapon to throw around when need be. Aside from those, Virizion is a better Drought user than Mega Charizard Y and Ninetales, since it doesn't take up a Mega Evolution slot over the former, and it doesn't completely suck over the latter. Resisting Stealth Rock is also a great bonus, and 90 / 72 / 129 defenses are actually pretty solid. Plus, 90 Attack and Special Attack mean Virizion can hit back fairly hard, and having Solar Beam, Giga Drain, Sacred Sword, and Focus Blast as offensive moves is actually pretty cool, and 108 Speed is godly for a defensive Pokemon, so it has a distinct advantage over the likes of Politoed and Tyranitar. Definitely getting my vote.
Drizzle Blastoise: A pretty cool idea. With Drizzle, Blastoise can abuse Water Spout and either become a hellish wallbreaker with a Choice Specs, or become a menacing revenge killer with a Choice Scarf, so he already has some flexibility there. Blastoise is basically a better Politoed, as even though Politoed has more support options, mainly Encore and Hypnosis, Blastoise has better overall stats and Rapid Spin. However, having both of these guys on the same team isn't such a bad idea, since you have an extra Drizzle setter to fall back on if one of them gets KOed, and having Politoed primed for taking special attacks and Blastoise primed for physical attacks could be interesting. Plus, you can use Drizzle to power up Mega Blastoise momentarily if you want to Mega Evolve, so Drizzle Blastoise is a boost to both himself and his Mega Evolution. A very solid idea.
Sand Stream Cradily: I wasn't that blown away by this at first, but then I realized that this would actually be a really good Theorymon. With 86 / 97 / 107 defenses and Recover, Cradily can last a while throughout the battle, but factor in Sand Stream buffing his Special Defense, and you have a surprisingly sturdy special wall on your side. 81 Special Attack is also fairly decent, and Giga Drain can provide decent offensive and defensive presences. In terms of weather wars, Cradily pulls its weight very nicely, since Politoed, Hippowdon, and non-Mega Tyranitar can't beat it one-on-one, and taking on Mega Charizard Y outside of the sun is pretty cool. I really like this one, and wouldn't be surprised if this won.
Snow Warning Glaceon: Yeah, we were kind of going with the weather train on this one. It's not hard to tell that Snow Warning Glaceon would have a hard time in OU, but there is one thing that makes this one really interesting: Blizzard. With hail maximizing Blizzard's accuracy, Glaceon's offensive presence gets a favorable boost, and slapping on a Choice Specs makes her attacks almost nuclear. Sadly, that's really it. Her defensive typing is garbage which offsets her solid defenses, hail will hurt her teammates, and there's also Sylveon, who's basically just better in almost every way. It was fun to fit the theme, but to me, this idea is more novelty than anything.
