No, Fire Pokemon do NOT counter this guy, they merely check him. You guys are spreading false information :/
Hidden Power Rock (what many agreed to be the standard on this guy) 2HKOs the majority of the Fires...how bloody balls is that a counter?
So are you going to be throwing out HP Rocks all over the place expecting a Fire Pokemon to switch in? What then if they don't switch in a Fire Pokemon? The sheer fear of FlashFire has caused you to attack with your weakest attack.
If you aren't throwing out HP Rocks, then who cares? Grass attacks do crap to fire Pokemon, especially since most have good SpDef and resist it.
You're assuming that Woodman Fire Blasts on the switch and activates Flash Fire...
317 SpA Woodman's HP Rock is a 2HKO with Leftovers (probably not on Arcanine anyway) 87% of the time assuming 4 HP / 0 SpD.
And you're assuming that Woodman HP Rocks on the switch.
Also, don't say that Fires are going to be running HP and SpD, lol. That's just as silly as saying Heracross is running HP Ice so Gliscor isn't a counter. Fires aren't going to completely debilitate themselves JUST to counter this thing.
Because obviously Pokemon don't run those EVs, right? Arcanine and Ninetales, if nothing else, already use a lot of HP EVs. Not only that, but Flareon and Ninetales (don't recall the others' SpDef) have 100+ SpDef. If you resist grass, and have 100+ defense spDef, you don't take much from grass knot/energy ball. Not only that, but most Fire Pokemon aren't that heavy so grass knot's BP is even lower.
As for Doug's suggestion that this isn't getting Fire Blast and we should cater the moves to the ability...I think that is preposterous. We are human beings not machines...we can think ahead a little bit. Assuming a Fire / Grass is going to get Fire Blast and Solarbeam in no way faulty. Why should we cater moves to an ability that we know requires catering to?
Because ability is voted on first, and if there are so many problems with over powered attacks, yet that ability gets voted on, you should lower the power of the attacks?
After running my calculations again, Fire's would become good checks assuming the best case scenario of a Fire move on the switch...and since Stealth Rock will most likely always be done with this "stall type" Pokemon, you can sure as hell assume that our Fire / Grasser will be Leech Seeding the majority of the time (as a Fire move would boost a lot of Fires, while Leech Seed would only cause it to have a disadvantage against Tentacruel.
So let's see. Your movepool is Fire Blast/Grass Knot/Leech Seed/HP Rock.
One attack is absorbed and grants more power to the user. This is the only attack affected by Sunny Day, btw.
Grass Knot is base damage, and likely lower than against most other threats due to the weight of many Flash Fire Pokemon. Then, it gets cut in half because it's resisted. Then, you look at SpDef. Three of the Flash Fire Pokemon have 80 SpDef. The other three have 100, 106, and 110. While their HP isn't exactly "huge", two are in the 60s, two in the 70s, and the other two in the 90s. That's not a lot of damage being taken.
Leech Seed helps it somewhat, but again look at those HPs. They aren't exactly huge, so it won't be absorbing much. Then your own Sunny Day will be helping
their Fire Blasts, which hits neutral and has STAB. They're more likely to 3hko you than you are to 2hko them, considering they all have more than 60 speed. Even Flareon outspeeds this.
HP rock... unless you have mad predict skills, or your opponent is super predictable, are you really going to be throwing HP rocks around hoping they switch to a fire or flying Pokemon? It's your weakest move overall.
Yea, Fires aren't counters, lol. You guys are thinking of "checks."
No, you're just over-theorymoning. You can't assume to be throwing out HP Rocks all over the place, not when your argument for it being overpowered is that it's
Fire Blast is getting strengthened.
Also, even more LOL, if you guys want to keep Fires as checks, you sure as hell better listen to me and not give this thing Earthquake or Rock Slide / Stone Edge / Head Smash (lmao).
I've been saying the same. In fact, I've been advocating this even without Sunny Day/Greenhouse. It shouldn't get those typings outside of HP period, no matter it's ability.