this may be a bit risky/gimmicky, but this would be even more beastly if a pokemon (say.... Smeargle) used Shell Break while holding a White Herb, then Baton Passed it to another pokemon who can use it (i.e. Cloyster or Omastar). they use it again, also with White Herb, and then proceed to sweep with +4 STAB Icicle Spear (Cloyster) or STAB Surf/Scald/Hydro Pump, if you're feeling lucky (Omastar). again, very gimmicky, very risky, but if done right, whatever pokemon you pass to can be incredibly destructive