User blog comment:BannedLagiacrus/Monster Appreciation Week: Brachydios(4th Gen)/@comment-25119729-20150905201054/@comment-26421638-20150905204014

I Think is Considered Non Elemental Damage... Because i usually have 20 or 15 Fire Res (And 790 of Defense) and i always take a lot of damage from Explosions...

And Fire Attacks always Deals Fireblight (except if you have 20 of fire Res or Blightproof) and brachy Explosions Doesn't Deal Fireblight... But i'm not 100% Sure