Skarmory + Firelax Counter
(Skarm+ Tar/Rhydon, Skarm + tank/umbreon, Skarm+Cune, Skarm+Missy)
(Warning)
there's a big issue with dedicating two slots for a non-guarantee counter to snorlax. you better hope your skarm + whatever plays a much bigger role than JUST stopping snorlax, because the majority of the time snorlax can probably play around both your "counters" somehow. this is literally pitfall #1 in gsc.
moreover, the skarm + missy/miltank/umbreon/suicune option means 1/3 of your team has a total of 2 attacks, neither of which do any significant damage to anything in the game. that's a lot of pressure on your other 4 to do most of the offensive work.
which means at this point, you're going to need a spiker. that way, your 2 non-attackers can induce indirect damage via spiking. the issue is, of course, both gsc spikers don't exactly deal damage either [outside of explosion]. so now 1/2 of your team functionally has 0 attacks.
The idea behind this one is pretty simple, Skarmory walls Snorlax unless it runs Fire Blast, on paper at least. Having a second look at Snorlax is pretty mandatory, otherwise you will just get ran over. This core has tons of variables that also pull off a variety of roles on a team, making it the go-to core to cover as many Snorlax variants as possible, as well as providing a solid defensive core against many things in the metagame. So this core is pretty much on every team that has a defensive approach to the game (stalls, turbodrumming, etc.), making it not only a no-brainer to use but also one of the most basic things to aim to break when building an offensive team. I will just name a couple of variants and provide importables for all the sets afterwards.
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Already mentioned before, this is pretty basic. If Snorlax runs EQ it gives the rock types troubles but gets walled by Skarmory. If Snorlax runs Fire Blast it beats Skarmory but fails to break the rock types. Rhydon is probably the more classic choice for this because as already mentioned, the rock needs Curse/Roar to actually do things to a Snorlax and Rhydon pulls off a curse/roar set more comfortably than Ttar most of the time. What's good about the combination here is that Rhydon isn't as passive as Skarmory is, it actually dishes out big hits, giving you one "safe" look at physical threats as well as a physically sturdy switchin that actually does have offensive pressure. Speaking of offensive pressure, Tyranitar does that too, as well as being the classic "jack of all trades" mon. Tyranitar is easily fittable on many teams because of the wide variety of things it can do, despite being not the most complete role-filler, especially when it comes to countering snorlax. Tyranitar can combat laxes, but very often just flat out won't beat them without running curse/roar. Basically Ttar is more an offensive utility mon that also checks firelax. This core does struggle against all-out attacking lax as well as belly drum versions that run lovely kiss and a coverage move, should effectively cover most other snorlaxes though. Other physical offensive mons sometimes need to be covered by the teammates though (Machamp comes to mind).
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Growl and Charm respectively can just stall out Curselaxes most of the time, as well as reliably come in on any potential fire moves from Snorlax. Miltank also provides good general support for teams with Body Slam and Heal Bell, making Skarmory more durable so it can wall any potential physical threat. Umbreon is also more of a team player with several support options, most commonly Pursuit and Toxic, but also potential Mean Look and Baton Pass shenanigans. This core has one big problem in being enourmously passive though, making it breakable by well played Lovely kiss laxes, Selfdestruct laxes, etc.
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Suicune might not be the most reliable Snorlax counter since all it can do is basically Roar it out or Toxic it. This does make it a decent answer to Lax with Spikes support, easily capitalizing on its insane bulk, being a general go-to wall that also comes in on firelax to shuffle things up a bit. You should be aware that Suicune will not really beat any Lax with Rest (read most of them) 1 on 1 or in the long run, it's an answer that fits well on teams that rely on spikes abuse, it's not a definite counter. Lovely Kiss Drumlax as well as Fire Blast + Selfdestruct can break through this, last mon firelax does beat this too. This core is again passive as hell, making it a better thing on paper than in practice.
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The concept here is pretty simple again, Ghosts ~usually~ beat Snorlaxes that lack EQ, Skarm usually beats EQ Snorlaxes. Missy has decent special bulk, making it a very good answer for most Fire Blast Snorlaxes. Missy does provide a rather unique role in perishtrapping providing wallbreaking abilities for stallier teams as well as just forcing tons of switches, making residual damage quite abusable, which is what defensive teams rely on alot after all. Misdreavus might look like a pretty passive mon, but it really isn't, it actually forces your opponent to play accordingly, making it a good pivot too. Missy without the classic perishtrapping set has seen quite some usage lately and i gotta say it's a pretty neat mon that does have other things vouching for it too in thief, destiny bond, hypnosis, Toxic, etc.
Quite often you will see Skarmory in one of these pairings, sometimes even more of them on the same team. The sets here are just suggestions, some mons are pretty versatile and can run way too much to press into one importable. I know the cores aren't like too innovative, i promise i will post something less boring soon
Skarmory @ Leftovers
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe
Bashful Nature
- Drill Peck
- Whirlwind
- Rest
- Curse/Toxic/Thief
Rhydon @ Leftovers
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe
Bashful Nature
- Curse
- Earthquake
- Rock Slide
- Roar
Tyranitar @ Leftovers
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe
Bashful Nature
- Rock Slide
- Pursuit/Earthquake/Rest
- Fire Blast/Curse
- Roar
Miltank @ Leftovers
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe
Bashful Nature
- Body Slam
- Growl
- Milk Drink
- Heal Bell
Umbreon @ Leftovers
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe
Bashful Nature
- Toxic
- Charm
- Pursuit
- Rest
Suicune @ Leftovers
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe
Bashful Nature
- Toxic
- Roar
- Surf
- Rest
Misdreavus @ Leftovers
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe
Bashful Nature
- Mean Look
- Perish Song
- Protect
- Confuse Ray/Thunder/Attract