Still, Hidden Power Flying's damage output is honestly pretty pathetic without Technician; and with Technician you can't run Poison Heal nor Vacuum Wave.
252+ SpA Breloom Hidden Power Flying vs. 248 HP / 8 SpD Celebi: 144-170 (35.7 - 42.1%) -- 87.1% chance to 3HKO after Leftovers recovery
*plink!*
See? Celebi can set up on Breloom for free if it has HP Flying instead of Sludge Bomb. It can Calm Mind boost with just leftovers, take Breloom out with Psychic and start hitting things with Giga Drain to heal back up.
As for Breloom, Hidden Power Flying is just about irrelevant for it, only having the niche of hitting other Breloom. HP Fire is probably a better option to hit Scizor, who takes very little damage from anything else Breloom does. Also, Sludge Bomb 2HKOs Celebi, preventing it from even being used as a revenge switch.
252+ SpA Celebi Psychic vs. 252 HP / 0 SpD Breloom: 216-254 (46.5 - 54.7%) -- guaranteed 3HKO after Poison Heal
Minimum 3 turns to actually KO Breloom, Calm Mind or no. Why aren't you running/arguing Psyshock?
... odd. According to the calculator Hidden Power Flying does
252+ SpA Breloom Hidden Power Flying vs. 252 HP / 0 SpD Mega Scizor: 73-86 (21.2 - 25%) -- 0% chance to 4HKO
this to Mega Scizor, but in an actual match I removed more than half a Mega Scizor's health with Hidden Power Flying. Even removing the HP investment gets
252+ SpA Breloom Hidden Power Flying vs. 0 HP / 0 SpD Mega Scizor: 73-86 (25.9 - 30.6%) -- guaranteed 4HKO
nowhere near that. And Technician+a negative Special Defense nature
still wouldn't justify 60%+ damage, even if I was somehow running it alongside Poison Heal.
I am becoming genuinely concerned Stat Switch's code is doing something very wrong, in conjunction with prior claims of Haunter 2HKOing Breloom. Or it could be the calculator I guess?
Regardless I'd also like to point out
252+ SpA Breloom Focus Blast vs. 252 HP / 0 SpD Mega Scizor: 216-255 (62.7 - 74.1%) -- guaranteed 2HKO
which is worth commentary since one of the stronger reasons to run Vacuum Wave is gone (Regice), and if Carbink goes there will be even less reason to run Vacuum Wave.
Hidden Power Flying is more than enough to render most Grass types non-counters to Breloom, and it's not actually insane to run it. (I consider the SubSeed Breloom far more insane -what exactly do they add to Breloom's utility?)
You're acting like breloom is this 6move 252 in everything hackmons beast. It's not.
I'm acting like it's very, very durable, capable of neutralizing most counters, not actually countered by that many viable Pokemon,
and has an impressive offense only really held back by Grass being a pretty iffy offensive type -and a surprising number of things fail to wall it in spite of resisting it because their Special Defense and/or HP is too low. I'm also acting like various "counters" people named aren't counters
because they aren't.
I still have not seen anything capable of OHKOing it when hitting its Special Defense, and I
also haven't seen any non-Flying moves capable of OHKOing it when hitting its Defense -which is problematic when you consider how rare Physical Flying coverage is and how many Flying types are dubious to use, or have swapped their offenses without having proper movepools for their new offense, or just flat out lack a real offense now. (Talonflame being a very notable exception, but saying every team should just run Talonflame to deal with Breloom is coming back to the idea that Breloom is at least over-centralizing)