Project Victim of the Week

[GnralLao]

Gastrodon as a Counter

Gastrodon @ Leftovers
Ability: Storm Drain
EVs: 252 HP / 252 Def / 4 SpD
Relaxed / Bold (if using Ice Beam) Nature
- Scald
- Earthquake / Ice Beam
- Toxic
- Recover

Due to its bulk and typing, Gastrodon is able to effectively counter Grass Knot-less mixed Thundurus all day long. It even has Recover to stay healthy throughout its matchup. Toxic, Scald and Thundurus' own LO recoil wears it down pretty quickly and Ice Beam, if you choose it over Earthquake, 2HKOes Thundurus.

Calcs

180 SpA Life Orb Thundurus Hidden Power Ice vs. 252 HP / 4 SpD Gastrodon: 92-109 (21.5 - 25.5%) -- possible 5HKO after Leftovers recovery
76 Atk Life Orb Thundurus Superpower vs. 252 HP / 252+ Def Gastrodon: 123-146 (28.8 - 34.2%) -- 99.4% chance to 4HKO after Leftovers recovery

0 SpA Gastrodon Scald vs. 0 HP / 0- SpD Thundurus: 109-129 (36.4 - 43.1%) -- guaranteed 3HKO (90.6% chance to 2HKO after SR)
0 SpA Gastrodon Ice Beam vs. 0 HP / 0- SpD Thundurus: 162-192 (54.1 - 64.2%) -- guaranteed 2HKO

 

[rubsomebacononit]

Mamo as Check

Mamoswine @ Life Orb
Ability: Thick Fat
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Ice Shard
- Earthquake
- Icicle Crash
- Knock Off

Mamoswine has a strong Ice Shard to take care of Thundurus, is immune to Thunderbolt, and has Thick Fat to take a HP Ice, but it must watch out for Superpower :[

252+ Atk Life Orb Mamoswine Ice Shard vs. 0 HP / 0 Def Thundurus: 252-299 (84.2 - 100%) -- guaranteed OHKO after Stealth Rock
76 Atk Life Orb Thundurus Superpower vs. 0 HP / 4 Def Mamoswine: 322-382 (89.6 - 106.4%) -- 43.8% chance to OHKO

Shoutout to DarkNostalgia and Recreant who are two good OU players. Also I want to get into OU n_n

 

[TONE]

Clefable as a counter

Clefable @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 172 Def / 84 SpD
Calm Nature
- Calm Mind
- Moonblast
- Soft-Boiled
- Flamethrower

Clefable resists Superpower and Knock Off and can take a Hidden Power Ice with ease. It takes Thunderbolt rather well and can Calm Mind or use Soft-Boiled while Thundurus wears itself down due to Life Orb recoil and finish it off with Moonblast.

Thundurus vs Clefable

180 SpA Life Orb Thundurus Thunderbolt vs. 252 HP / 84+ SpD Clefable: 161-191 (40.8 - 48.4%) -- guaranteed 3HKO after Leftovers recovery

180 SpA Life Orb Thundurus Hidden Power Ice vs. 252 HP / 84+ SpD Clefable: 73-86 (18.5 - 21.8%) -- possible 6HKO after Leftovers recovery

76 Atk Life Orb Thundurus Superpower vs. 252 HP / 172 Def Clefable: 70-83 (17.7 - 21%) -- possible 7HKO after Leftovers recovery

76 Atk Life Orb Thundurus Knock Off (97.5 BP) vs. 252 HP / 172 Def Clefable: 57-68 (14.4 - 17.2%) -- possible 9HKO after Leftovers recovery

Clefable vs Thundurus

0 SpA Clefable Moonblast vs. 0 HP / 0- SpD Thundurus: 132-156 (44.1 - 52.1%) -- 11.7% chance to 2HKO

 

[michaeloche]

Altaria @ Altarianite
Ability: Cloud Nine
EVs: 248 HP / 136 Def / 96 SpD / 28 Spe
Impish Nature
- Dragon Dance
- Roost
- Return
- Heal Bell / Substitute / Earthquake

Role: Check

calcs

180 SpA Life Orb Thundurus Hidden Power Ice vs. 248 HP / 96 SpD Mega Altaria: 138-164 (39 - 46.4%) -- guaranteed 3HKO (the most it can do)

0 Atk Pixilate Mega Altaria Return vs. 0 HP / 0 Def Thundurus: 208-246 (69.5 - 82.2%) -- guaranteed 2HKO (56.3% chance to OHKO after Stealth Rock, guaranteed OHKO after rocks and LO recoil)

King Dedede, aka Defensive Dragon Dance Mega Altaria, can take 2 hits from HP Ice and dent or even flat out KO Thundurus back with Return. Don't switch in too recklessly, though, especially if you haven't mega evolved yet, as HP Ice will OHKO after rocks if that's the case.

 

[Random Passerby]

Name: Latias
Status:Counter

Latias @ Latiasite
Ability: Levitate
EVs: 252 HP / 212 Def / 44 Spe
Bold Nature
- Calm Mind
- Roost
- Psyshock
- Hidden Power Fighting / Hidden Power Fire

Mega Latias laughs at anything Thundurus-I can do, including "Super Effective" Hidden Power Ice and Knock Off while easily 2HKO-ing with Psyshock or boost it's stats with Calm Mind. 44 Spe allows Mega Latias to outpace Jolly Mega Tyranitar and hit it hard with Hidden Power Fighting, which also hits Bisharp. However, Hidden Power Fire can be used to hit Mega Scizor, Klefki and Ferrothorn.

calculations

180 SpA Life Orb Thundurus Hidden Power Ice vs. 252 HP / 0 SpD Mega Latias: 112-133 (30.7 - 36.5%) -- guaranteed 3HKO after Stealth Rock
76 Atk Life Orb Thundurus Knock Off vs. 252 HP / 212+ Def Mega Latias: 99-117 (27.1 - 32.1%) -- 60.3% chance to 3HKO after Stealth Rock
0 SpA Mega Latias Psyshock vs. 0 HP / 0 Def Thundurus: 154-183 (51.5 - 61.2%) -- guaranteed 2HKO

 

[DoABarrelRoll]

(hard check)


Dragalge @ Draco Plate
Ability: Adaptability
EVs: 228 HP / 252 SpA / 28 Spe
Modest Nature
- Toxic Spikes
- Draco Meteor
- Sludge Wave
- Focus Blast

Dragalge is not 2HKOed by HP Ice at full health and can either use Thundy as TSpikes fodder or simply OHKO with Draco Meteor or Sludge Wave after rocks, even if its plate has been knocked off.

180 SpA Life Orb Thundurus Hidden Power Ice vs. 200 HP / 0 SpD Dragalge: 133-159 (41.4 - 49.5%) -- guaranteed 3HKO
76 Atk Life Orb Thundurus Knock Off (97.5 BP) vs. 200 HP / 0 Def Dragalge: 120-142 (37.3 - 44.2%) -- guaranteed 3HKO

252+ SpA Draco Plate Adaptability Dragalge Draco Meteor vs. 0 HP / 0- SpD Thundurus: 408-482 (136.4 - 161.2%) -- guaranteed OHKO
252+ SpA Adaptability Dragalge Draco Meteor vs. 0 HP / 0- SpD Thundurus: 340-402 (113.7 - 134.4%) -- guaranteed OHKO
252+ SpA Adaptability Dragalge Sludge Wave vs. 0 HP / 0- SpD Thundurus: 248-294 (82.9 - 98.3%) -- guaranteed OHKO after Stealth Rock

 

[Choice Bowtie]

Mega-Swampert as a hard check

Swampert-Mega @ Swampertite
Ability: Swift Swim
EVs: 112 HP / 252 Atk / 144 Spe
Jolly Nature
- Power-Up Punch
- Waterfall
- Earthquake
- Ice Punch
​

Pert fears nothing from this particular Thundurus's set: Electric immunity and lack of Grass Knot make it so that it can switch in on any move and easily KO him with Ice Punch. Superpower, the only move that can deal an unlaughable amount of damage, conveniently lowers Thundurus's attack. As an added bonus, Swampert only has to take one attack if he switches in with rain up; none if he's brought in for free.

Calcs

76 Atk Life Orb Thundurus Superpower vs. 112 HP / 0 Def Mega Swampert: 125-148 (33.8 - 40.1%) -- guaranteed 3HKO after Stealth Rock
-1 76 Atk Life Orb Thundurus Superpower vs. 112 HP / 0 Def Mega Swampert: 83-99 (22.4 - 26.8%) -- 28.4% chance to 4HKO
180 SpA Life Orb Thundurus Hidden Power Ice vs. 112 HP / 0 SpD Mega Swampert: 73-87 (19.7 - 23.5%) -- possible 5HKO

252 Atk Mega Swampert Ice Punch vs. 0 HP / 0 Def Thundurus: 244-288 (81.6 - 96.3%) -- guaranteed 2HKO

 

[Level 56]

Quagsire (Hard check)

Quagsire @ Leftovers
Ability: Unaware
EVs: 252 HP / 252 Def / 4 SpD
Relaxed Nature
- Scald
- Earthquake
- Toxic
- Recover

Quagsire can check Thundurus quite easily as it has an immunity to Thundurus' main STAB. It can come in against any of Thundurus' moves and can then just toxic stall it, making Quagsire a solid check to Thundurus.

 

[DarkNostalgia]

nightingale (Sableye) @ Sablenite
Ability: Prankster
EVs: 252 HP / 112 Def / 144 SpD
Careful Nature
- Knock Off
- Will-O-Wisp
- Recover
- Foul Play

status: check

Mega Sableye avoids the 2HKO from any given move when Stealth Rock is not up, and 2HKOes back with Foul Play or cripples Thundurus with Knock Off, making it weaker thanks to Knock Off removing Life Orb. Not a counter because it can't manually switch in a win unless it hasn't Mega Evolved and Recovers off Thunderbolt damage, and after Stealth Rock Thunderbolt 2HKOes.

 

[escarlata]

Check
Weavile @ Life Orb
Ability: Pressure
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Icicle Crash
- Knock Off
- Ice Shard
- Low Kick / Pursuit

Weavile can easily switch into anything Thundurus and easily score an KO back with Icicle Crash, even +2 Defiant Superpower fails to OHKO Weavile (who am I kidding, that Superpower KO Weavile 6 times over).
Superpower aside, Weavile does have enough bulk to take a Thunderbolt, but has a chance of fainting if SR is up. (I just used bulk and Weavile in the same sentence)

Yey numbers

180 SpA Life Orb Thundurus Thunderbolt vs. 0 HP / 0 SpD Weavile: 203-239 (72.2 - 85%) -- guaranteed 2HKO
+2 76 Atk Life Orb Thundurus Knock Off (97.5 BP) vs. 0 HP / 0 Def Weavile: 155-182 (55.1 - 64.7%) -- guaranteed 2HKO

In return, Icicle Crash obviously grants an easy KO, even if its item has been knocked off.
In addition, if Weavile's Life Orb is not Knocked off, even Knock Off could KO Thundurus after Thundurus takes a turn of LO recoil.

Relevant numbers

252 Atk Weavile Icicle Crash vs. 0 HP / 0 Def Thundurus: 354-416 (118.3 - 139.1%) -- guaranteed OHKO

 

[Gros orteil]

Ampharos-Mega @ Ampharosite
Ability: Mold Breaker
EVs: 248 HP / 8 SpA / 252 SpD
Calm Nature
IVs: 0 Atk
- Volt Switch
- Dragon Pulse
- Rest
- Sleep Talk

Mega Ampharos is an underestimated wall that can tank common offensive special threats, including Thundurus. HP Ice 3HKOs Ampharos only with help of stealth rocks while Thundurus's main stab, Thunderbolt, does ridiculous damages thanks to Ampharos's advantageous double typing, and Knock Off, since it's not boosted, does nothing either.
Superpower may 3HKO Ampharos but because of the drop, is insufficient to kill.
In return, Ampharos can 2HKO Thundurus with both Volt Switch and Dragon Pulse, keep the momentum with Volt Switch and recover HPs with Rest.

calcs

180 SpA Life Orb Thundurus Hidden Power Ice vs. 248 HP / 252+ SpD Mega Ampharos: 107-127 (27.9 - 33.1%) -- guaranteed 4HKO
76 Atk Life Orb Thundurus Superpower vs. 248 HP / 0 Def Mega Ampharos: 130-153 (33.9 - 39.9%) -- guaranteed 3HKO

8 SpA Mold Breaker Mega Ampharos Volt Switch vs. 0 HP / 0- SpD Thundurus: 157-186 (52.5 - 62.2%) -- guaranteed 2HKO
8 SpA Mold Breaker Mega Ampharos Dragon Pulse vs. 0 HP / 0- SpD Thundurus: 192-226 (64.2 - 75.5%) -- guaranteed 2HKO

 

[InvisibleWater]

Check

Excadrill @ Life Orb
Ability: Sand Rush
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Earthquake
- Iron Head
- Rock Slide
- Swords Dance / Rapid Spin

Excadrill can come in on any of Thundurus' moves (with the exception of Superpower and +2 Knock Off) and OHKO with Rock Slide. If Excadrill's Life Orb is knocked off, rocks need to be up for it to OHKO.

Due to Excadrill's lower speed, Sand has to be up for it to be a safe check.

Calcs

Offensive:
252+ Atk Life Orb Excadrill Iron Head vs. 0 HP / 0 Def Thundurus: 129-152 (43.1 - 50.8%) -- 2.7% chance to 2HKO
252+ Atk Life Orb Excadrill Rock Slide vs. 0 HP / 0 Def Thundurus: 322-380 (107.6 - 127%) -- guaranteed OHKO
252+ Atk Life Orb Excadrill Rapid Spin vs. 0 HP / 0 Def Thundurus: 44-52 (14.7 - 17.3%) -- possible 6HKO

Defensive:
180 SpA Life Orb Thundurus Hidden Power Ice vs. 0 HP / 0 SpD Excadrill: 112-133 (31 - 36.8%) -- 64.7% chance to 3HKO
76 Atk Life Orb Thundurus Knock Off (97.5 BP) vs. 0 HP / 4 Def Excadrill: 164-194 (45.4 - 53.7%) -- 41% chance to 2HKO
+2 76 Atk Life Orb Thundurus Knock Off (97.5 BP) vs. 0 HP / 4 Def Excadrill: 328-386 (90.8 - 106.9%) -- 43.8% chance to OHKO
76 Atk Life Orb Thundurus Superpower vs. 0 HP / 4 Def Excadrill: 406-478 (112.4 - 132.4%) -- guaranteed OHKO

 

[Alfalfa]

(hard check)


Dragalge @ Draco Plate
Ability: Adaptability
EVs: 228 HP / 252 SpA / 28 Spe
Modest Nature
- Toxic Spikes
- Draco Meteor
- Sludge Wave
- Focus Blast

Dragalge is not 2HKOed by HP Ice at full health and can either use Thundy as TSpikes fodder or simply OHKO with Draco Meteor or Sludge Wave after rocks, even if its plate has been knocked off.

180 SpA Life Orb Thundurus Hidden Power Ice vs. 200 HP / 0 SpD Dragalge: 133-159 (41.4 - 49.5%) -- guaranteed 3HKO
76 Atk Life Orb Thundurus Knock Off (97.5 BP) vs. 200 HP / 0 Def Dragalge: 120-142 (37.3 - 44.2%) -- guaranteed 3HKO

252+ SpA Draco Plate Adaptability Dragalge Draco Meteor vs. 0 HP / 0- SpD Thundurus: 408-482 (136.4 - 161.2%) -- guaranteed OHKO
252+ SpA Adaptability Dragalge Draco Meteor vs. 0 HP / 0- SpD Thundurus: 340-402 (113.7 - 134.4%) -- guaranteed OHKO
252+ SpA Adaptability Dragalge Sludge Wave vs. 0 HP / 0- SpD Thundurus: 248-294 (82.9 - 98.3%) -- guaranteed OHKO after Stealth Rock

Dragalge has a fair chance to get 2HKOd by HP Ice after Stealth Rock, which you should know at this point is very easy to set up and is frequently on the field.

180 SpA Life Orb Thundurus Hidden Power Ice vs. 228 HP / 0 SpD Dragalge: 133-159 (40.5 - 48.4%) -- 62.1% chance to 2HKO after Stealth Rock

Thundurus isn't exactly going to stay in on Dragalge either, it is going to switch right out to a different mon. Since Dragalge also lacks reliable recovery, it really isn't a hard check at all, just a shaky check that risks losing to Thundurus with hazards up.

 

[GnralLao]

Sylveon as a Check

Sylveon @ Choice Specs
Ability: Pixilate
EVs: 240 HP / 252 SpA / 16 Spe
Modest Nature
- Hyper Voice
- Psyshock
- Hidden Power Fire / Hidden Power Ground / Shadow Ball
- Baton Pass

Due to its special bulk and typing, Sylveon can switch into any move from LO mixed Thundurus even after SR and OHKO back with a Pixilated Hyper Voice. If Sylveon switches into Knock Off, Sylveon still OHKOes him after two LO recoils.

Calcs

180 SpA Life Orb Thundurus Thunderbolt vs. 240 HP / 0 SpD Sylveon: 142-168 (36.3 - 42.9%) -- guaranteed 3HKO

252+ SpA Choice Specs Pixilate Sylveon Hyper Voice vs. 0 HP / 0- SpD Thundurus: 373-441 (124.7 - 147.4%) -- guaranteed OHKO
252+ SpA Pixilate Sylveon Hyper Voice vs. 0 HP / 0- SpD Thundurus: 249-294 (83.2 - 98.3%) -- guaranteed 2HKO (50% chance to OHKO after one LO recoil and guaranteed OHKO after two LO recoils or SR)

Mega Camerupt as a Check

Camerupt @ Cameruptite
Ability: Solid Rock
EVs: 168 HP / 252 SpA / 88 Spe
Modest Nature
- Fire Blast
- Earth Power
- Ancient Power
- Will-O-Wisp / Stealth Rock / Toxic

M-Camerupt takes little damage from LO mixed Thundurus' moves bar Superpower, but even then, it's not 2HKOed by it after SR. Also, being a Mega, it doesn't lose its item when Knocked Off. In return, M-Camerupt easily OHKOes Thundurus with a powerful Fire Blast (or with Ancient Power after one LO recoil if you're scared of missing Fire Blast and/or desperately need the stat boosts lol I forgot Sheer Force gets rid of secondary effects).

Calcs

180 SpA Life Orb Thundurus Hidden Power Ice vs. 168 HP / 0 SpD Mega Camerupt: 75-90 (23.2 - 27.8%) -- guaranteed 4HKO after Stealth Rock
76 Atk Life Orb Thundurus Superpower vs. 168 HP / 0 Def Mega Camerupt: 135-160 (41.7 - 49.5%) -- guaranteed 3HKO after Stealth Rock
-1 76 Atk Life Orb Thundurus Superpower vs. 168 HP / 0 Def Mega Camerupt: 90-107 (27.8 - 33.1%) -- guaranteed 4HKO after Stealth Rock

252+ SpA Sheer Force Mega Camerupt Fire Blast vs. 0 HP / 0- SpD Thundurus: 373-439 (124.7 - 146.8%) -- guaranteed OHKO
252+ SpA Sheer Force Mega Camerupt Ancient Power vs. 0 HP / 0- SpD Thundurus: 272-320 (90.9 - 107%) -- 43.8% chance to OHKO (guaranteed OHKO after one LO recoil or SR)

 

[MANNAT]

Wobbuffet @ Custap Berry
Ability: Shadow Tag
EVs: 52 HP / 232 Def / 224 SpD
Bold Nature
- Encore
- Counter
- Mirror Coat
- Destiny Bond

Wobbu can take any hit, proceed to encore Thundy into the last move that it used, and has a potential 2nd kill guaranteed (on an AoA or mon with only rocks) if thundy doesn't use knock off after Wobbu 1v1s Thundy.

Calcs

76 Atk Life Orb Thundurus Knock Off (97.5 BP) vs. 52 HP / 232+ Def Wobbuffet: 224-265 (41.9 - 49.6%) -- guaranteed 3HKO after Leftovers recovery
180 SpA Life Orb Thundurus Thunderbolt vs. 52 HP / 224 SpD Wobbuffet: 200-238 (37.4 - 44.5%) -- guaranteed 3HKO after Leftovers recovery

 

[Albacore]

Hard Check

Celebi @ Leftovers
Ability: Natural Cure
Evs: 252 HP / 156 Def / 84 SpD / 16 Spe
Impish Nature
- Giga Drain
- Recover
- Thunder Wave
- Perish Song

Celebi can only lose if it swicthes in on a Knock Off while rocks are up and then takes an HP Ice the following turn, and gets a high roll on both :

76 Atk Life Orb Thundurus Knock Off (97.5 BP) vs. 252 HP / 156+ Def Celebi: 172-203 (42.5 - 50.2%)
180 SpA Life Orb Thundurus Hidden Power Ice vs. 252 HP / 84 SpD Celebi: 146-172 (36.1 - 42.5%)

Once its leftovers are gone, it can easily stall Thundurus out for LO damage, since none of its moves can 2HKO.

 

[Fire-breather Richard]

Raikou as a check.

Raikou @ Choice Specs
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Thunderbolt
- Volt Switch
- Hidden Power Ice
- Shadow Ball

Raikou can switch into any move Thundurus uses except Knock Off, survive the hit, and KO back with Choice Specs-boosted Thunderbolt or Hidden Power Ice.

Calculations

76 Atk Life Orb Thundurus Superpower vs. 32 HP / 0 Def Raikou: 172-203 (52.2 - 61.7%) -- guaranteed 2HKO
180 SpA Life Orb Thundurus Thunderbolt vs. 32 HP / 0 SpD Raikou: 88-105 (26.7 - 31.9%) -- guaranteed 4HKO
252 SpA Choice Specs Raikou Thunderbolt vs. 0 HP / 0- SpD Thundurus: 271-319 (90.6 - 106.6%) -- 43.8% chance to OHKO
252 SpA Choice Specs Raikou Hidden Power Ice vs. 0 HP / 0- SpD Thundurus: 242-286 (80.9 - 95.6%) -- guaranteed 2HKO

 

[Aragorn the King]

Week 73:

Thanks Celticpride for filling in! This week's victim is... CM + Roar Suicune

Suicune @ Leftovers
Ability: Pressure
EVs: 252 HP / 236 Def / 20 Spe
Bold Nature
- Calm Mind
- Scald
- Rest
- Roar

 

[heritage]

Counter

Visions (Serperior) @ Leftovers
Ability: Contrary
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Leaf Storm
- Dragon Pulse
- Hidden Power Fire
- Taunt / Giga Drain / Glare

Although Taunt is generally a rarer option on Serperior, it completely shuts down this Suicune set. Even if, for whatever reason, Serperior doesn't use Taunt first turn or it doesn't carry it, trying to set up Calm Minds along Serperior is obviously is not a good idea, and Leaf Storm still does massive damage even if Suicune forces it out (and Serperior can simply switch back in if that happens). When Taunt is activated, Suicune can no longer recover or attempt to force Serperior out with Roar. All Suicune can do is spam Scald, which does pitiful damage, to try to get burn damage off while Serperior 2HKOs even if Suicune manages to get a Calm Mind off. Leftovers heals the majority of Scald's damage as well, so the most Suicune is going to do is burn damage.

What Suicune does

0 SpA Suicune Scald vs. 0 HP / 0 SpD Serperior: 42-49 (14.4 - 16.8%) -- possible 6HKO

Suicune's +1 damage:
+1 0 SpA Suicune Scald vs. 0 HP / 0 SpD Serperior: 62-73 (21.3 - 25%) -- 0% chance to 4HKO

What Serperior does

If Suicune is at +0:
252 SpA Serperior Leaf Storm vs. 252 HP / 0 SpD Suicune: 264-312 (65.3 - 77.2%) -- guaranteed 2HKO after Leftovers recovery

+2 252 SpA Serperior Leaf Storm vs. 252 HP / 0 SpD Suicune: 524-618 (129.7 - 152.9%) -- guaranteed OHKO

If Suicune somehow gets to +1:
252 SpA Serperior Leaf Storm vs. +1 252 HP / 0 SpD Suicune: 176-210 (43.5 - 51.9%) -- guaranteed 3HKO after Leftovers recovery

+2 252 SpA Serperior Leaf Storm vs. +1 252 HP / 0 SpD Suicune: 350-414 (86.6 - 102.4%) -- 18.8% chance to OHKO

 

[Albacore]

Counter

Mew @ Leftovers
Ability: Synchronise
Evs: 252 HP / 148 SpD / 108 Spe
Careful Nature
- Knock Off
- Taunt
- Will-O-Wisp
- Roost

A bit of a long process, but Mew easily swichces in on Suicune, Taunts it, then stalls it to death by removing its leftovers, burning it, and recovering up when necessary. Mew gets burned in the process but defenitely wins

+1 0 SpA Suicune Scald vs. 252 HP / 148+ SpD Mew: 93-111 (23 - 27.4%) -- possible 5HKO after Leftovers recovery

 

[GnralLao]

Mega Sceptile as a Hard Check

Sceptile @ Sceptilite
Ability: Overgrow
EVs: 4 Def / 252 SpA / 252 Spe
Naive Nature
IVs: 30 Atk / 30 SpA / Spe
- Leaf Storm
- Dragon Pulse
- Earthquake
- Hidden Power Fire

Due to its typing, M-Sceptile easily tanks Suicune's Scald and retaliates by outspeeding and OHKOing it with Leaf Storm. However, if M-Sceptile switches into a Calm Mind, it unfortunately won't be able to KO it due to the SpAtk drop from Leaf Storm.

Calcs

0 SpA Suicune Scald vs. 0 HP / 0- SpD Mega Sceptile: 25-30 (8.8 - 10.6%) -- possibly the worst move ever
+6 0 SpA Suicune Scald vs. 0 HP / 0- SpD Mega Sceptile: 100-118 (35.5 - 41.9%) -- guaranteed 3HKO (that bulk though...)

252 SpA Mega Sceptile Leaf Storm vs. 252 HP / 0 SpD Suicune: 408-482 (100.9 - 119.3%) -- guaranteed OHKO

If M-Sceptile switches into Calm Mind:

252 SpA Mega Sceptile Leaf Storm vs. +1 252 HP / 0 SpD Suicune: 272-324 (67.3 - 80.1%) -- 84.8% chance to 2HKO after Leftovers recovery

If Suicune uses Rest on M-Sceptile's first Leaf Storm:

-2 252 SpA Mega Sceptile Leaf Storm vs. +1 252 HP / 0 SpD Suicune: 138-164 (34.1 - 40.5%) -- possible 5HKO after Leftovers recovery (M-Sceptile loses, but that's what switches are for)

If Suicune uses Calm Mind instead on M-Sceptile's first Leaf Storm

-2 252 SpA Mega Sceptile Leaf Storm vs. +2 252 HP / 0 SpD Suicune: 102-122 (25.2 - 30.1%) -- possible 9HKO after Leftovers recovery (slight chance of 2HKO after SR and Leftovers)

 

[Random Passerby]

Name: Raikou
Status: Counter

Raikou @ Choice Specs
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Thunderbolt
- Volt Switch
- Hidden Power Ice
- Shadow Ball

Raikou takes very little from unboosted Scald and can OHKO back with Thunderbolt. If Suicune Calm Minds as it comes in, Suicune is still 2HKOed while it didn't manage to 2HKO back.

Calculations

0 SpA Suicune Scald vs. 0 HP / 0 SpD Raikou: 79-94 (24.6 - 29.2%) -- 99.9% chance to 4HKO
252 SpA Choice Specs Raikou Thunderbolt vs. 252 HP / 0 SpD Suicune: 360-426 (89.1 - 105.4%) -- 31.3% chance to OHKO
+1 0 SpA Suicune Scald vs. 0 HP / 0 SpD Raikou: 118-141 (36.7 - 43.9%) -- guaranteed 3HKO
252 SpA Choice Specs Raikou Thunderbolt vs. +1 252 HP / 0 SpD Suicune: 240-284 (59.4 - 70.2%) -- guaranteed 2HKO after Leftovers recovery

 

[p2]

Shaymin as a counter

Shaymin @ Life Orb
Ability: Natural Cure
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Seed Flare
- Earth Power
- Hidden Power [Fire]
- Rest

Suicune is hopeless against Shaymin and the only thing it can bank on it stalling out Seed Flares low PP. Seed Flare has a ~60% to OHKO unboosted Suicune, while it guarantees a 2HKO on boosted Suicune as well as absorbing Scalds easily because of Natural Cure and just Rests up if it ends up with low HP.

252 SpA Life Orb Shaymin Seed Flare vs. 252 HP / 0 SpD Suicune: 377-447 (93.3 - 110.6%) -- 62.5% chance to OHKO
4 SpA Suicune Scald vs. 0 HP / 4 SpD Shaymin: 39-47 (11.4 - 13.7%) -- possible 8HKO

 

[escarlata]

Counter
Toxicroak @ Life Orb/Black Sludge
Ability: Dry Skin
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Gunk Shot
- Drain Punch
- Sucker Punch
- Swords Dance

Suicune literally does nothing to Toxicroak except Roaring it out. However, Toxicroak can always keep coming in again with impunity and firing off Gunk Shots which is a 3HKO. The moment Suicune is forced to Rest, you pretty much get your free SDs and seal the deal.

252 Atk Life Orb Toxicroak Gunk Shot vs. 252 HP / 236+ Def Suicune: 146-173 (36.1 - 42.8%) -- 95.7% chance to 3HKO after Leftovers recovery

 

[DarkNostalgia]

Gardevoir @ Gardevoirite
Ability: Trace
EVs: 24 Def / 232 SpA / 252 Spe
Timid Nature
- Hyper Voice
- Psyshock
- Focus Blast
- Taunt

status: check

Mega Gardevoir is a good check to Suicune thanks to its access to Taunt, which stops Suicune dead in its tracks. Suicune can then only use Scald, which doesn't do much, while Mega Gardevoir 2HKOes back with Pixilate-boosted Hyper Voice.

Calcs:

232 SpA Pixilate Mega Gardevoir Hyper Voice vs. 252 HP / 0 SpD Suicune: 201-237 (49.7 - 58.6%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery