May seem slightly weird, but in the right situations, its unexpected and works. Go full tank with this set-up.
Registeel @ Silk Scarf
EV's: (These are aproximations) 60 HP/150 Def/150 Sp. Att/150 Sp. Def
Rest is TM, Amn/Irn Def are level up moves and Snore is move tutor in BW2. Depending on the Pokemon the opponent sent out, use either Amnesia or Iron Defense. Next turn use it again, then Rest and Snore. When you wake up, use the opposite stat booster and then Rest and Snore again. What also works is using Iron Defense or Amnesia whilst sleeping to stop you form using any PP on those turns and waiting out any Ghost type's PP (so they have to use Struggle). It works as a great troll and Registeel makes a brilliant tank for any team.