There's no B/W Team Rating sub-forum yet, and since it's not D/P anymore I figure this would be a more appropriate place to post. This is a team I'm going to aim to build:
Samurott
Ability: Torrent
Nature: Quiet
Moves:
-Surf
-X-Scissor
-Ice Beam
-Revenge
Weakness: (2X – Electric, Grass)
Krookodile
Ability: Intimidate
Nature: Careful
Moves:
-Earthquake
-Crunch/Foul Play
-Aerial Ace
-Stone Edge
Weakness: (2X – Water, Grass, Ice, Fight, Bug)
Escavalier
Ability: Swarm
Nature: Adamant
Moves:
-X-Scissor
-Iron Head
-Aerial Ace
-Poison Jab
Weakness: (4X – Fire)
Elektross
Ability: Levitate
Nature: Hardy
Moves:
-Thunderbolt
-Crunch
-Dragon Claw
-Brick Break
Weakness: (None)
Chandelure
Ability: Flame Body
Nature: Modest
Moves:
-Psychic
-Shadow Ball
-Flamethrower
-Energy Ball
Weakness: (2X – Water, Ground, Rock, Ghost, Dark)
Hydregion
Ability: Levitate
Nature: Serious
Moves:
-Dragon Pulse
-Crunch
-Flamethrower
-Surf
Weakness: (2X – Ice, Fight, Bug, Dragon)
OR
Meleotta (Pirouette)
Ability: Serene Grace
Nature: Adamant
Moves:
-Brick Break
-Return
-Shadow Claw
-Psyshock
Weakness: (2X – Fight, Flying, Psychic)
It's a debate on the end to go with Meleotta or Hydregion, both would round out the bottom of the team nicely. Depending on the last Pokemon, I feel that the weaknesses are balanced with either 2 or 3 double effected Pokemon by one type. Those are easily countered too.