moltres seems to have interesting resistances/immunities in grass, bug, ground, fighting, fire and fairy, as well as cool stats, but honestly what does it do? i cannot see any utilities for it after looking at the top mons in the viability rank, what set have you people used?
SPECS HURRICANE SPAM UNDER RAIN
Moltres is a really interesting 'Mon. Just like Zapdos, it can go both offensive
and defensive (however zapdos has a better typing imo). It has handy immunities, 4x resisting grass and bug, and resisting fighting and fire, as well as being immune to ground. The latter 3 are common offensive attacking types.
I'd be fine with him sitting in B, though
Offensively it has that nice 125 Base SpA along with Fire Blast to nuke shit and Hurricane or Air slash. However it's coverage sort of stops right there, which is a shame, since it has to resort to Hidden Power to hit stuff like Empoleon. U-turn also comes in handy for a Specs user, but that crippling 4x weakness to SR though ;-;. Also it's not that fast, but 90 Base Speed is good enough I think. If you want him to be faster you can always run the Agility set. And there also exists the Sunny Day + Solar Beam set.
Surprisingly, I have found ways to make it work on a Rain team last gen in RU, because, unlike Zapdos, it learns Hurricane.
Defensively it has decent bulk in 90/90/85, but with it's slew of resistances it can make it to work, especially when invested. Defensively it has 2 options (I think): SubRoost+2 attacks or WoW and Roost+2 attacks. I haven't really used these sets as much, but I've seen them work sometimes. And it has a very good Stalling Ability in Pressure to go along with it.
Also if you're going to use it, I would advise you to run Defog or Rapid Spin (Hey, FWG Core with Blastoise, Roserade and Moltres?)
Some calcs for funsies
Offensive
252 SpA Life Orb Moltres Hidden Power Grass vs. 252 HP / 0 SpD Suicune: 148-177 (36.6 - 43.8%) -- 99.3% chance to 3HKO after Leftovers recovery
252 SpA Life Orb Moltres Fire Blast vs. 252 HP / 252+ SpD Florges: 121-144 (33.6 - 40%) -- 30% chance to 3HKO after Leftovers recovery
252 SpA Life Orb Moltres Fire Blast vs. 252 HP / 252 SpD Filter Mega Aggron: 312-368 (90.6 - 106.9%) -- 43.8% chance to OHKO
252 SpA Life Orb Moltres Fire Blast vs. 252 HP / 4 SpD Assault Vest Metagross: 330-393 (90.6 - 107.9%) -- 43.8% chance to OHKO
Meh, offensively it isnt that strong, But it can put some damage against teams because Fire is pretty good Offensively. Also you can run specs.
Defensive
252 Atk Life Orb Mienshao High Jump Kick vs. 252 HP / 252+ Def Moltres: 104-122 (27 - 31.7%) -- guaranteed 4HKO
252 Atk Sheer Force Darmanitan Flare Blitz vs. 252 HP / 252+ Def Moltres: 104-123 (27 - 32%) -- guaranteed 4HKO
252 Atk Sheer Force Darmanitan Rock Slide vs. 252 HP / 252+ Def Moltres: 348-412 (90.6 - 107.2%) -- 43.8% chance to OHKO
(idk if this is the set Scar'd Darmanitan usually runs)
252 SpA Hydreigon Draco Meteor vs. 252 HP / 252 SpD Moltres: 181-214 (47.1 - 55.7%) -- 77% chance to 2HKO
252 SpA Choice Specs Chandelure Shadow Ball vs. 252 HP / 252 SpD Moltres: 186-220 (48.4 - 57.2%) -- 93.4% chance to 2HKO
Neh, not
that good defensively but it can take a hit and shrug it off with roost however.
Tl Dr; Moltres is a pretty cool 'mon and can run a slew of different sets, but it isnt impressively strong , both defensively and offensively. It is good enough for
B imo