Had what was definitely my best run in B/W.
Salamence @ lum berry
Suicune @ leftovers
Snorlax @ chesto berry
The team played pretty much like this. Lead with Salamence. If the enemy sends out something that Salamecne doesn't fear (like Flareon), use Sub and hope for a status move. Then hopefully, DDance and the sweep will be imminent. If the opponent sent out a physical attacker, switch to Suicune and the intimidate + pressure + rest will stall out the pp for the 1 or 2 moves that actually hurt Cune. If they are going to use a physical grass or electric attack, then switch back to Mence for another intimidate and then start over. If it's a special threat, switch for Snorlax. Get a curse or 2 in, chesto rest off the damage and start the sweep.
My end came against Scientist Stubbs. His Druddigon beat Suicune w/ CB Outrage and then Medicham cleaned up with Life Orb and Psycho Cut on Salamence & HJK on Snorlax.