not to mention it isn't the best way to deal with volcarona anyway. i dunno, i think volc might be a /bit/ too good for the meta, but people are way overstating how hard it is to deal with.
here's a tip: keep your rocks up. that helps a ton.
want actual pokemon? here's a list: snorlax, blissey (stoss + twave never loses to volc), rock slide goodra, (mega) aerodactyl, infernape (even better if its scarf), rhyperior (and don't give me that giga drain bullshit, that isn't good in this tier, it was only good in bw ou because of rain mons), HARIYAMA (pretty underrated actually), and the aforementioned fletchinder are all very very solid checks.
softer checks include SpD hippowdon, flygon, arcanine, victini, chandelure, noivern, tentacruel, and swampert.
offensive answers: tyrantrum, barbaracle, and if you want to be cool there's also kabutops, omastar, and druddigon. kabu is kind of shitty tho i admit :o
revenging tools: extremespeed from luke or entei. sucker punch from honchkrow and mega absol. psyshock from sash zam.
volc would have been completely ridiculous if it dropped by itself, but a hard counter, two solid checks, and the best revenge killer ever dropped right alongside it, so stop bitching for a second and actually play the fucking meta.
thanks. :]