Your team looks ok so far, but there are a few minor changes you should make.
Arcanine: I would go with a Jolly nature instead of Hasty, but that's preferential. Also: why SAtk EVs? You don't have any Sp. Attacking moves, so just go all Attack instead. And Wild Charge can also be a good move, interchangeable with Extremespeed. Item: Expert Belt or Black Belt
Charizard: Looks like you have two natures. Choose Timid over Hasty, but again, that's preferential. Replace Earthquake with Air Slash, because of STAB and Earthquake on a Charizard Y? Not really useful.
Ninetales: Everything's good except replace Energy Ball with Nasty Plot. Item: Focus Sash so you can at least pull of one Nasty Plot.
Typhlosion: Solar Beam's always a good move, delete Earthquake, because again, Typhlosion is an Sp. Attacker. Keep either of the two Fire moves, only one is needed. I would run Heat Wave or Flamethrower, because both current moves are not always reliable. Also, Focus Blast can be interchanged with HP Ice.
Infernape: Here's a set a would run:
Infernape@Expert Belt
EVs: 252 Atk, 252 Spd, 4 HP
Nature: Adamant/Jolly
Ability: Iron Fist
-Fire Punch
-Thunder Punch
-Mach Punch
-U-turn
HP Ice is not really that helpful for infernape, because of Thunder Punch for Flying and U-turn for everything else.
Volcarona: Only thing I would change: Modest nature instead of Bold.
Overall, the only thing that you needed to change were the EVs and some moves. It's pretty well-balanced, I'd say.
Hope I helped!
