Grass vs fire

On this end of the ring is  Is Ferrothorn. Up against Flareon. This hot headed little foxy loves to use flash fire. that allows him to make more powerful fire-type moves.  But will this be enough to protect him from iron barb? An attack that deals damage on impact. So flare's flash fire may not help, but being fire typed helps against ferrothorn's  /4.   Looking at type  weaknesses, flare has an advantages.  Flare has more stat advantages so he wins.