Infernape@ focus sash Timid 252 special attack 252 speed Fire Blast Hidden Power Ice Nasty Plot Counter
Pretty good, just not against things that resist its two moves. If they are physical attackers though, you can Counter them. Especially Talonflame.
I got 247 wins in the Battle Maison with this as my lead, just Flamethrower over Fire Blast. Nasty Plot Blaze boosted Flamethrower/Fire Blast vaporizes anything that doesn't resist it, unless it's something with immense Special bulk.
+2 252 SpA Blaze Infernape Fire Blast vs. 252 HP / 4 SpD Blissey: 355-418 (49.7 - 58.5%) -- 69.5% chance to 2HKO after Leftovers recovery.