I've tried a using a bulky RestTalk set, running
Xerneas@leftovers
252 HP, 252 Def, 4 Spd
Bold
-Moonblast
-Calm Mind
-Sleep Talk
-Rest
and it has worked pretty well so far, with that investment you can avoid the 2HKO from Genesect's Iron Head (no attack boost) and 2HKO back so long as you...