OK, here's the team I used. Unlike the last two tournaments, this team was not the product of careful deliberation and testing. This team was the product of me going on Serebii.net and going "Oh shit that was today?! Quick, gotta make a team, gotta make a team, gotta make a team", firing up Black version, and throwing six of my EV trained mons in the battle box.
Ninetales@Wise Glasses
Drought
Timid nature
255 Sp. Atk/255 Spd
~SolarBeam
~Psyshock
~Nasty Plot
~Flamethrower
You can tell from this I had hastily settled on a sun team. Ninetales led nearly every battle, except if I saw T-tar, Hippowdon, or Politoed in Team Preview, because I knew Ninetales's ability would activate first, only to get cancelled out by Sand Stream or Drizzle. Did reasonably well, though the lack of the usual Focus Sash did hurt a bit.
Hitmontop@Muscle Band
Technician
Adamant nature
*forgot the EVs, but Attack was maxed out, and HP and Speed were involved*
~Bulldoze
~Fake Out
~Aerial Ace
~Mach Punch
Anyone who faced me in the International Challenge will recognize this as one of two Pokémon I always led with. Well, Hitmontop didn't get the top spot every match this time, but I always made sure to lead with it if there was a T-tar in Team Preview. Did reasonably well each time. Never used Bulldoze, though, as it could hit anything else on my team, whereas last time I had it paired with Yanmega.
Leafeon@Life Orb
Chlorophyll
Adamant nature
255 Atk/255 Spd
~Leaf Blade
~Grasswhistle
~X-Scissor
~Bite
Yeah, yeah, I know, Grasswhistle. In my defense, Leafeon's movepool leaves (heh, heh, see what I did there?) a lot to be desired. I did try Grasswhistle twice, as a last-ditch effort, and both times it failed me miserably. B2/W2 better include some sort of improvement to Leafeon's movepool. As far as sweeping goes, though, Leafeon did all right.
Druddigon@Leftovers
Rough Skin
Adamant nature
255 Atk/255 HP
~Earthquake
~Revenge
~Shadow Claw
~Dragon Claw
I'm not sure if I ever told you guys, but I was considering using this instead of the Zweilous that had helped me rock the past two tournaments, and in the end decided to give him a chance. Druddigon turned out to be a huge help. The bulk is incredible, Attack is through the roof, and I don't think many people saw Revenge coming. Rough Skin also bagged at least one KO. Not sure if Druddigon did better than Zweilous, but it's definitely a possibility at the moment.
Minun@Focus Sash
Minus
Timid nature
255 Sp. Atk/255 Spd
~Nasty Plot
~Thunderbolt
~Grass Knot
~Hidden Power (Dragon)
Don't laugh, Minun was far from dead weight, even without a teammate with Plus or Minus. Outspeeds more than you'd think, and even helped me win a battle or two. I know, I know, HP Dragon, yeah. I'm a bit lazy when it comes to breeding for specific Hidden Power types, which is why I consider it nothing short of a blessing when something good just falls into my lap, like...
Tangela@Eviolite
Chlorophyll
Modest nature
*I forget the EVs, pretty sure I maxed out Speed, definitely maxed out Sp. Atk*
~Sunny Day
~Hidden Power (Fire)
~SolarBeam
~Morning Sun
Yeah, you're reading that right. Morning Sun, not Synthesis. I caught this Tangela in XD as a Shadow Pokémon, and it literally turned out to have a Modest nature and HP Fire without me even trying for it. Only reason I never evolved it is cause I saved the game and tried it in Pearl, and it would've changed its ability to Leaf Guard as a Tangrowth. I hadn't gotten around to altering its moveset after EVing Ninetales, even though that was at least a year ago, which is why it still knows Sunny Day. Like I said, I threw this team together in a considerable hurry. But it was still a great help. Tangela really pulled its weight on the team, but its lack of effectiveness against Dragon-types really hurt it in the end.
EDIT: What's all this about a live spreadsheet?