Usage stats for the month of August were just released today, so I thought it would be a good idea to look through them and take note of what's changed between August and the month prior. Figured it would be a good discussion topic to see
why some stuff has changed and what could benefit from these changes. I'll be using the 1630 stats since that's what was posted on the usage stats thread and because it'll give us a better idea of what's good in the tier than if I were to look at the low ladder stats. I'll post a link to the thread and the stats page for those who can't find it.
General Overview
Simply just looking at the usage stats thread for the month of August would show that the metagame has remained rather similar to that of July for the most part. The vast majority of pokemon saw changes in usage of 1% more or less, meaning little variation in usage ranking with a few exceptions like Roserade who fell from 28th to 34th despite losing only little over half a percentage point. However, there are a few pokemon that I've noticed had a noticeable change in usage between July and August. These pokemon are
Heatran, Clefable, Latias, and Azumarill. I'll focus on Heatran and Clefable first since those two are the more drastic of the four.
Heatran and Clefable
In July,

was
second in usage with just under 34% usage, while

was
fifth in usage with 31% usage. In August,

dropped down to
fifth in usage with 29% usage, roughly a 5% drop in usage! Meanwhile,

rose all the way up
second in usage with about 34% usage, about a 3% increase in usage. From what I can tell, there hasn't been much change in the overall metagame to warrant such a drop in usage from Heatran, yet Clefable clearly thrives from the drop in usage considering Heatran is perhaps Clef's most prominent counter. If anyone can perhaps explain the drop in usage from Heatran, I'd greatly appreciate it.
Latias and Azumaril
From what I can tell, the changes in usage from these two isn't intertwined like with Heatran and Clefable, but I'm still going to talk about them in tandem. In July,

was
seventh in usage with about 22% usage, while

was
seventeenth in usage with just under 10% usage. In August,

dropped to
eighth in usage with 19% usage, a 3% drop. Meanwhile,

has risen to
sixteenth in usage with 12% usage, a 2% increase. While Latias obviously doesn't appreciate two Fairy types rising in usage to prevent her from spamming her strongest STAB move, neither Azumarill or Clefable appreciate taking STAB Psychic, so it's not like they're a major hindrance against Latias. Once again, if someone could explain these changes in usage, I'd appreciate it a lot.
Digging A Bit Deeper
Now that we've gone over the noticeable changes on the usage stats thread, I think it's time to go to the moveset page and dig a little deeper into the metagame changes. I'll be going through these in order of usage on the August moveset page, I'll only do the first eight since I don't want to make a massive wall of text. I mean it's still a wall of text but whatever.

Scizor remains at the top of usage to nobody's surprise, and has undergone little change that is new. Compared to its usage in July, where its most used spread max attack adamant with HP investment. Scizor has shifted to using a specially defensive spread as its most used spread. That being said, offensive spreads are still plentiful, as they are the next three EV spreads in line. The uptick in SpDef Scizor means that Defog has become slightly more common compared to the month prior, while Swords Dance has seen a small drop in usage. However, that is not to say Defog sees more usage overall, as Swords Dance still sees slightly more usage on Scizor likely due to Scizor being paired up with another hazard remover such as Gliscor. Life Orb now seems to be the boosting item of choice for offensive sets, having gone from about 16% usage in July to 21% in August. Lastly, Quick Attack has become increasingly common on offensive sets in order to be able to hit the likes of Rotom-Wash and other water types.

Now having reached second in usage, Clefable has undergone more changes than one would have expected during the month of August. Let's get the biggest change out of the way first, the rise of the Cosmic Power set. In July, this set was essentially not listed at all, the EV spread wasn't listed, and Cosmic Power was listed as a move but not Stored Power or Charge Beam. Now, the EV spread for the Cosmic Power set is the fourth most used spread with just under 10% usage. Not only that, but Stored Power and Charge Beam are now listed moves, both with around 10-11% usage, even Cosmic Power saw a small increase in usage, rising up to 13%. As a result of this, Wish and Protect have seen a big drop in usage, dropping by about 10% and 14% respectively, while Moonlight has increased in usage by about 12%. Other moveset changes include a small increase in Flamethrower by about 4%, a drop in usage of Calm Mind by about 7%, a drop in Thunder Wave usage by about 9%, and a large increase in Stealth Rocks usage by about 17%, causing Stealth Rocks to have a usage rate of about 25% on Clefable. On top of simply having a Clefable counter, it'd be best to also start bringing Taunt user, a Phazer, or a Haze user in order to deal with this increase in Cosmic Power Clefable.

Garchomp keeps its third placing in the month of August, having functionally changed very little. That is not to say there isn't anything to talk about though, so let's get into it. Let's start with item usage. Garchomp's main item the past two months has been Life Orb, though there has been about a 10% decrease in Life Orb usage between July and August, going from 39% to 29%. Garchomp's second most common item in July, Choice Scarf, has also seen a decline in August, this time by about 9%, going from 23% to 14% usage. Yache Berry has become more common though, having risen from 11% in July to 22%. In terms of EV spreads, very little has changed, max attack and max speed Jolly remains the most used set with mixed variants being under it in usage. In terms of moves, Garchomp has seen an increase in usage from Outrage (up 10% points), Stealth Rocks (up 17% points), and Swords Dance (up 17% points). I think this suggests that offensive Rocks sets with SD are becoming more prelavent, so be on the look out for those sets. On the other hand, many of Garchomp's moves have seen a decrease in usage over the course of August. Most notably among these are Fire Blast (down 20% points), Poison Jab (down 9% points), and Draco Meteor (down 7% points). The former two are coverage moves which Garchomp uses to be able to bypass certain counters, namely Skarmory, Tangrowth, and Togekiss. The decrease in usage from these moves should mean that these mons have a tad bit more wiggle room against Garchomp, thought Tangrowth should still be wary of a boosted Outrage from LO Garchomp.

Up next is Gliscor who once again keeps its fourth place placement in the usage stats. The biggest changes Gliscor has undergone is a decrease in SpDef sets while simultaneously seeing an increase in max attack max speed Jolly SD sets which were not listed in July. This is reflected in the usage of its moveset with Swords Dance seeing a increase of 11% points and Facade now being listed as a move with 10% points. Similarly, Stealth Rocks and U-turn have seen small declines in usage on Gliscor. However, that is not to say that Gliscor's role is going to be drastically changing, as the vast majority of EV spreads it can run are not listed due to the wide variety of spreads that it can run. Gliscor will forever remain Gliscor.

Washtom the brave little washing machine has seemingly done a 180% on its most common role in August, with Choice Scarf variants making up nearly half of all Washtom during the month. In contrast, Washtom saw Leftovers usage on nearly half of its uses during July. The changes in its moveset usage reflect this fact as well, Trick has seen an increase of 16% points, now reaching 58%. Other moves which show this trend is the slight uptick in Thunderbolt usage (up 7% points) and Protect no longer being listed as one of its most common moves. Lastly, it appears a specially defensive EV spread has started popping up in usage, being the third most common EV spread. If I were to guess, its purpose would be in order to deal with Starmie, though I can't be 100% sure on that.

Heatran hasn't changed all that much despite falling from its previous spot in second place. For starters, its item usage is nearly identical, only seeing a very small increase in usage for Leftovers and Power Herb. Though there is a new item that has appeared on the usage stats it appears, Choice Scarf, with 2% usage. I personally do not see the appeal of Scarf Heatran, but it's not my job to judge others. Heatran's EV spreads have remained the same since July, offensive variants with Timid being the most common, followed by specially defensive sets, and finishing it off with offensive variants with Modest. In terms of moves, Stealth Rocks has seen the biggest increase on Heatran, having a 70% usage rate in August, compared to the 54% usage rate from July. Other moveset changes include a drop in Protect usage in August, as well as a drop in Overheat usage. Lastly, Flash Fire has become the preferred ability on Heatran with a 61% usage rate in August compared to 52% in July. This obviously helps Heatran switch in on other Heatran using a fire move, but hurts it's utility in burning Scizor who try to U-turn out on a Heatran coming in.

I'll keep this one short, Blissey has barely changed, because it has no real reason to change. Aside from the odd offensive sets you see on low ladder occasionally, you won't run into anything new or surprising from Blissey. If I were to say anything, it would be that Aromatherapy has seen a small decline in usage during August.

And last but not least for this post is Breloom. In comparison to July, Breloom has seen an uptick in Poison Heal sets during the month of August. Over 65% of Breloom are still using Technician, however, so it's best to keep that set in mind when building. In terms of item, Toxic Orb is the most used, though that isn't a surprise considering Poison Heal sets only run that item, while Technician sets can choose between many items. The item choice for offensive sets is primarily Focus Sash and Life Orb, with an increase in Choice Scarf usage. Choice Band has become less common in August too. The EV spread will depend on which type of Breloom you encounter, Poison Heal sets will invest more into HP than Technician sets which prefer speed. In terms of moves, Mach Punch has seen a decline in usage, dropping 15% points in August down to 65%. Other moves which dropped in usage are Rock Tomb and Bullet Seed, both used on Technician sets, though they didn't drop as much as Mach Punch did. In exchange, Substitute, Focus Punch, Seed Bomb, and even Toxic have seen an increase in usage, no doubt due to the increase in Poison Heal Breloom. Tangrowth will no doubt be effective against Breloom as always, though you should be wary of the increase in Toxic from Breloom.
So Who Benefits?
So what was the point of this post, of all that text? Well aside from sharing what I could find from the usage stats data, I wanted to discuss what pokemon could benefit from the recent metagame changes, since everybody surely has a different answer. I wanted to share my answer to you all, in order to start discussion.

The decrease in Garchomp running Fire Blast, the decrease in Heatran, as well as Scizor being as good as ever makes me think that Skarmory will be useful in the metagame throughout this month. Taunt and Whirlwind can shutdown Cosmic Power Clefable itself so long as there's another teammate to phaze in. Brave Bird OHKO's Breloom without investment, and being able to lay Spikes or Stealth Rocks will always be useful. It will obviously struggle with Washtom and Heatran, but that's nothing other teammates can't handle. The decrease in Latias usage also means that Skarmory won't have to risk taking Latias' STAB moves or Thunderbolt. It also deals with Choice Band Azumarill well, which leads to my next pick.

Already on the rise throughout August, I feel confident that Azumarill will keep up the momentum throughout this month. Being able to threaten all the mons mention listed earlier and many more makes it a threat that must be accounted for going forward. Being able to take advantage of pivoting moves from Scizor and Washtom will also be a great boon for it since it will be able to hit the field without the need to switch directly into attacks. Resisting Weavile's STAB combo is also a big plus.
So what do you guys think? What do you make of the latest usage data? What mons do you think will see an increase in usage throughout this month? Whatever you have to say on this matter, I'd like to know.