Don't forget Protect guys. By using Protect you stop Copycat from chosing Roar, as it choses the last used move, Protect. So assuming you already brough it down to its Sash it will be then OHKOed by everyhting.
No serious team should be threatened by it imo. Weather, hazards, Protect, Magic Bounce pokes and faster priority (Extremespeed, Mach Punch from Infernape, Quick Attack from Genesect and Terrakion and even Bullet Punch from Jolly Scizor and Mach Punch from Jolly Breloom) all fuck it up.
Part of the OU QC team, message
me for a check!