>>19778890252 Atk Parental Bond Mega Kangaskhan Sucker Punch vs. 252 HP / 0 Def Cresselia: 219-258 (49.3 - 58.1%) -- 60.5% chance to 2HKO after Leftovers recovery
252 Atk Parental Bond Mega Kangaskhan Return vs. 252 HP / 0 Def Articuno: 243-288 (63.2 - 75%) -- guaranteed 2HKO after Leftovers recovery
252 Atk Parental Bond Mega Kangaskhan Return vs. 252 HP / 252+ Def Zapdos: 195-231 (50.7 - 60.1%) -- 85.2% chance to 2HKO after Leftovers recovery
So... what, it PuP'd and then swept with return? Remember in future that it's probably a good idea to bring status for Kangaskhan, since it'll often run try and sucker punch you. You git. Gud riddance.