>>17165173Except greninja isn't really a sweeper as much as late-game mop-up.
He wants to come in against a set of mons who are weakened enough that he can just come in and hopefully pull off a set of 1hkos.
I could see why you might argue shurikens so he could counter a user of priority, but other than that what the fuck is he going to do? He needs every single point of damage to help insure he deals that fatal hit, because otherwise he's not surviving the counterattack.