To start off, if there is already a thread for this, just tell me. I searched for one to no result, but I understand I may have missed something.
This is where you can post your teams for any kind of competitive Pokemon team. Hopefully someone else will see it and critique it (Without absolutely insulting the other team, of course). I find it also beneficial to learn new metagames by looking at other teams, and if you have any questions, you can always ask.
The following is one of my teams I've made for VGC 2013 (Here I come, Athens!). VGC 2013 is set up like 2012, doubles, no OP legendaries, i.e. Kyogre, Zekrom, not going to list them all. Flat Rule, no real clauses.
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Quiet [Nature] Chandelure [Pokemon] @ Fire Gem [Item] (252 Sp.A, 252 HP, 4 Sp.D [EVs]) (Flash Fire [Ability])
-Protect [Move]
-Trick Room [Move]
-Heat Wave [Move]
-Shadow Ball/ Hidden Power Grass [Move/Move signals the user is looking for advice on which to use]
[Additional Notes, in this case none]
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Relaxed Porygon2 @Eviolite (252 HP, 252 Def, 4 Sp.D) (Download)
-Protect
-Trick Room
-Thunderbolt/Ice Beam
-Recover
Would've taken in Trace instead of Download, but I don't want to take in Swift Swim during a Trick Room.
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Brave Conkeldurr @ Flame Orb (252 Att, 252 HP, 4 Sp.D) (Guts)
-Drain Punch
-Rock Slide
-Mach Punch
-Protect
Average set.
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Quiet Jellicent @ Water Gem (252 HP, 252 Sp. A, 4 Sp.D) (Water Absorb)
-Protect
-Water Spout (This is where the real wrecking comes to screw up Sand, and anything else, for that matter)
-Shadow Ball
-Trick Room
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Sassy Amoonguss @ Sitrus Berry (252 HP, 252 Sp.D, 4 Sp.A) (Effect Spore)
-Protect
-Giga Drain
-Rage Powder
-Spore
Usually leads with Jellicent or Porygon2, Rage Powders if a Taunter is present to let TR have a chance to be set up.
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Brave Scizor @ Occa Berry (252 HP, 252 Att, 4 SpD) (Technician)
-Protect
-Bullet Punch
-Bug Bite
-Superpower/Aerial Ace
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[Overall Team Notes] Obviously Trick Room, made to counter Rain.
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Obviously some posts will be long, but feel free to do less detail. I did somewhere near the absolute maximum, try not to be too scared ._." But some people can add IVs if it's absolutely necessary. The minimum should be at least Pokemon and a few moves. You can also post a single Pokemon. And of course, as previously stated feel free to ask further questions about teams.

@redpanda that team is decent but needs work
and is this just for pokemon black and white or can we say are teams from R/S/E G/S/C and D/P/PL and ETC

For chandalure just give it energy ball instead of HP grass. I would give it shadow ball for STAB. As for Scizor I would give aerial ace for bug/fighting types. I'd say it's a well rounded team, but try it in action first.

Adamant Escavalier Red Card (252 Hp,252 att 4 sdD) (Swarm)
-Megahorn
-Swords Dance
-Iron Head
-Aerial Ace
Basiclly my trick room counter
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Calm Milotic, Leftovers (252HP, 252 spD 4D) (Marvel Scale)
-Mirror Coat
-Toxic/Light Screen
-Brine
-Recover
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Modest Porygon-Z, Salac Berry (252 SpA, 252 Speed,4 D) (Download)
-Tri Attack
-Dark pulse
-Thunderbolt
-Shadow Ball/Nasty plot
One of my main attackers
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Impish Dusknoir Leichi Berry (252 Hp ,252 D, 4SpD) (Pressure)
-Will-O-Wisp
-Skill Swap
-Shadow Punch
-Taunt
The multi-purpose pokemon. Dusknoir will probably be my lead.
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Admant Electrivire Life orb, (252 Att, 252 speed, 4 D) (Motor Drive)

-Cross Chop
-Ice punch
-Thunder punch
-Earthquake/Rock Slide
My pokemon with the best coverage.

@mieu-fire - You can use any Pokemon, they don't have to be from B/W. I just put that there to state that you shouldn't come in here not expecting to see some 5th Gen Pokemon.
@Eternal-Cyprees - Thanks for the opinion. For Electivire I would use Rock Slide, assuming you're doing doubles, none of your Pokemon resist Earthquake and flinch hax is always nice! For Porygon-Z, skip the Nasty Plot and go straight for the Shadow Ball. Nasty Plot sounds very pleasing, but Fighting-types are common and a bit worrisome to a Base 70 Defense to waste a turn on setting up. As for Milotic, I would (personally) go for Toxic. Most of your team doesn't need Sp.D support, and with that level of bulk on Milotic along with Recover, it makes for an extremely annoying set. Overall it's a great team with good typing and coverage, along with amazing bulk to get past weather.

Seems like this belongs in the black and white 2 thread or at least in the DS section.

For Porygon-2, I say keep in trace and split some of the evs up. That's what I did. Make sure you give SP atk a little something.

I was planning on putting it in the DS section, but saw a thread for B/W (in-game) teams. Apparently TBD said to put that kind of discussion in General. I figured the same applied to this. And as for putting it in another thread, I just wanted to devote a thread to competitive teams.

Actually, what I said was to move the discussion to the main Pokemon B/W2 discussion thread, not to just create a new thread for the same thing in GD. That said, I can't recall having a thread specifically for offering advice and suggestions about other players' competitive teams (as opposed to 'hey i'm using rattata, pidgey, and pikachu, what are you using'), so I'm going to leave this open.

My Scizor has Acrobatics along with a Flying Gem, its pretty awesome.

My team for battles is Latias timid nature with EVs and IVs in speed and special. Moves are Dragon Pulse, Thunderbolt, Surf, and Recover with the held item Wise Glasses. Abomasnow with naughty nature and EVs and IVs in attack and special attack. His moves are Woodhammer, Ice shard, Ice beam and Energyball with a held item quick claw. Electivire with naughty nature EVs and IVs in attack and HP. His moves are Earthquake, Thunderpunch, thunderwave, and Brickbreak with a Magnet held item. Latios with a timid nature and EVs and IVs in speed and special attack. Moves are Draco Meteor, thunderbolt, recover and psychic and he's holding the item white herb. I'm still working on my other team pokemon but those are the battle ready ones.