>>18309057To back this up
1st Turn
>-1 252 Atk Aerilate Mega Pinsir Return vs. 252 HP / 252+ Def Fur Coat Furfrou: 81-96 (22.8 - 27.1%) -- possible 5HKO after Leftovers recovery2nd Turn
>-2 252 Atk Aerilate Mega Pinsir Return vs. 252 HP / 252+ Def Fur Coat Furfrou: 60-72 (16.9 - 20.3%) -- possible 7HKO after Leftovers recoveryGoing with the highest percentage at the end of turn two, thats 47.4% damage. which leaves Furfrou with 52% hp.
3rd Turn
>-3 252 Atk Aerilate Mega Pinsir Return vs. 252 HP / 252+ Def Fur Coat Furfrou: 48-57 (13.5 - 16.1%) -- possibly the worst move everAfter three turns this leaves Furfrou with 36% hp, which it cant take the fourth turn to use rest. After that, it can go ahead and use Cotton Guard.
5th Turn
>-3 252 Atk Aerilate Mega Pinsir Return vs. +3 252 HP / 252+ Def Fur Coat Furfrou: 20-24 (5.6 - 6.7%) -- possibly the worst move ever6th Turn
>-4 252 Atk Aerilate Mega Pinsir Return vs. +3 252 HP / 252+ Def Fur Coat Furfrou: 16-20 (4.5 - 5.6%) -- possibly the worst move everAt this point Leftovers will recover any damage done to Furfrou, leaving Mega Pinsir as a useless pokemon that Furfrou can wear down with either Toxic, if they wanted to stall, or just Return. Yes, this scenario requires 0 crits as well as Mega Pinsir being the last pokemon on the attackers team.