Slowking:
+2 252+ Atk Charizard Thunder Punch vs. 248 HP / 252+ Def Slowking: 222-262 (56.4 - 66.6%) -- guaranteed 2HKO after Leftovers recovery
+2 252+ Atk Charizard Thunder Punch vs. 248 HP / 0 Def Slowking: 322-380 (81.9 - 96.6%) -- guaranteed 2HKO after Leftovers recovery
Alomomola:
+2 252+ Atk Charizard Thunder Punch vs. 120 HP / 136 Def Alomomola: 274-324 (54.6 - 64.6%) -- guaranteed 2HKO after Leftovers recovery

Diancie:
+2 252+ Atk Charizard Earthquake vs. 248 HP / 0 Def Diancie: 250-296 (82.5 - 97.6%) -- guaranteed 2HKO after Leftovers recovery (that's pretty nice actually)
Rhyperior:
+2 252+ Atk Charizard Earthquake vs. 248 HP / 0 Def Solid Rock Rhyperior: 213-252 (49.1 - 58.1%) -- 60.5% chance to 2HKO after Leftovers recovery