I'm suprised that no one has meantioned Zorua much. With moves such as Nast Plot, Swords Dance, Agility, Taunt, Counter, U-Turn, Night Burst, Extrasensory, Trickery, and Pursuit it can truely wreak havoc in LC. I can see a NP set working well to ruin stall:
Zorua @ Life Orb
Nature...