Cloyster...
I just found out that Mach Punch Breloom hard counters some stuff. Like Shellbreak Cloyster, Subpetaya Empoleon, Sand Throw (I think) Doryuuzu, Trick Room stuff (like Rampardos, Rhyperior).
But I'd rather use Focus Punch. Maybe that's just me, but...
Well, I haven't played Gen 5 meta yet. Is cloyster really, THAT good?
PS. Wait, can Breloom even OHKO cloyster after a shell break?