Protect or Sub Brelooms are a serious problem for many teams, but in general Breloom doesn't have the defenses or typing to pull off a serious stall like this. I use a more defensive one from time to time (Adamant with no attack EVs still Focus Punches things into oblivion), and while it laughs at anything that can't OHKO it, and utterly destroys slower teams, it's still too frail to keep in against counters that aren't put to sleep.
More on topic, this is a great thought-provoking post. I can't help but wonder how a specs Glaceon would fare on a team like this.
Something like:
Glaceon@Choice Specs
- Blizzard
- Hidden Power Fighting
- Shadow Ball
- Sleep Talk / Ice Beam
Modest - 204hp/252spatk/52spd
I know it's a more stall-ish team, but this seems impossible to resist on a hail team. Very few things would want to take a STAB Blizzard coming from that kind of SpA (Empoleon and Heatran come to mind, as well as the few Water/Ice combos, all of which are weak to HP fighting). Unlike SpecsMence, you're not taking a SpA drop by using an attack nearly as powerful, and you have hail to back you up.
Some calculations:
Standard Bold Blissey: 35.15% - 41.46%
- That's around 1% less of it's health than the first SpecsMence Draco Meteor takes off. This also has the benefit of hail countering leftovers, and can possibly freeze. If it's willing to risk the possibility of a freeze or critical, it can try to stall with softboiled.
Max SpD/HP Calm Cresselia: 44.37% - 52.03%
- I don't know how many people actually run something like this (I would imagine very few, but maybe coming in on specials and putting up a reflect...), but mentioning it gives a lot of perspective. Cresselia isn't doing anything to Glaceon either way, especially not in hail.
Infernape: 71.91% - 84.62%
- Possible death if stealth rock is out, bad switch in even when it's not. With hail damage and likely a life orb, it's not doing much of anything.
Non-bulky Lucario: 77.30% - 90.78%
- Even with it's 4x stealth rock resist, it still has a very slim chance of dying after hail damage.
Bulky Lucario: 53.20% - 62.50%
- This is a silly situation. Even if it doesn't swords dance, you could likely stay in and KO on the next Blizzard, because Close Combat has only a 10% chance of OHKOing. Very dangerous though, because any versions in between this one and the 'normal' sweeping Lucarios will easily OHKO.
Sweeping Kabutops: 81.65% - 95.88%
- It's hard to even make a Kabutops to specifically counter this Glaceon, as even max attack Adamant OHKOs with stone edge only half the time, and max sp.defensive still risks a 2HKO.
Weavile: 63.92% - 75.26%
- Immune to hail damage, but still not good, unless there to revenge kill. Jolly CB Brick Break does 64.67% - 76.05% back to Glaceon and even Adamant CB versions only do around 70-85%. Being weak to stealth rock doesn't help either.
Standard Houndoom: 65.12% - 76.41%
- Obligatory weak to Stealth Rock mention. If stealth rock is not out, it survives a bit and OHKOs.
Metagross: 48.90% - 57.42%
- Metagross will OHKO with Meteor Mash, but 52 speed EVs is all Glaceon needs to outspeed all but Agiligross and secure the kill. Note that a weird leftovers variety Metagross has a chance of surviving.
Heavy SpD Bronzong: 35.50% - 41.72%
- Sleeptalk versions of this can stall somewhat (only because of the low Blizzard PP), but while gyro ball can possibly 2HKO (assuming the slowest possible Bronzong), it dies before it can get off a second. Explosion works, however.
Scizor: 69.50% - 81.56%
- CB/Life orb versions with Iron Head can OHKO, and will be faster. Anything else dies.
Poliwrath:
- Brick Break is only a 2HKO, even on the CB version. Bulky Poliwrath (252 HP) takes 46.35% - 54.43% and has a chance to survive the second hit with leftovers. Anything less than 144 EVs in HP has zero chance of surviving the second Blizzard.
As far as weather changers go... Hippowdon isn't even worth mentioning, and Tyranitar takes a lot of risks switching in because it can't be sure it's faster, and you'll also be carrying HP fighting.