Not sure if this was an error with the random battles calc or a case of actual cheating/hacking, but only dealt 44.6% with my Persian's Foul Play to a Meloetta; according to the calc it should have done between 55.7 to 66.4%
Calc: Lvl 93 84 Atk Life Orb Persian Foul Play vs. Lvl 82 84 HP / 84...