Is Serperior viable in Gen 7 OU?

Serperior is ranked #15 in Gen 7 OU with 10.12% usage according to Smogon May 2026 - Jul 2026 data.

What beats Serperior in Gen 7 OU?

Celesteela has the strongest conservative score in this observed May 2026 - Jul 2026 sample. The target was knocked out or switched out in 74.0% of 24.621759277643722 relevant encounters. Standard error is 8.8 points. Sets and switch conditions can change the result.

How are Serperior matchup checks ranked in Gen 7 OU?

They are ranked by p minus four standard errors. Here, p is the observed fraction of relevant encounters where Serperior was knocked out or switched out. This is not a set-specific battle guarantee.

Serperior counters

Gen 7 OU · Sorted by p − 4 standard errors · Smogon source period May 2026 - Jul 2026 · Generated 2026-08-05

#0497 Serperior

Grass

USAGE 10.1% #15

ABILITYContrary

BASE STATS

HP 75

ATK 75

DEF 95

SPA 75

SPD 95

SPE 113

BST528

TYPE MATCHUPS

2×

FireIcePoisonFlyingBug

½×

WaterElectricGrassGround

Moves

Leaf Storm 99.8% Glare 74.4% Defog 45.2% Substitute 39.0% Hidden Power Fire 36.8% Leech Seed 33.8% Taunt 32.7% Knock Off 21.4%

Items

Leftovers 41.6% Rocky Helmet 27.9% Choice Scarf 19.5% Wiki Berry 5.3% Grassium Z 2.8% Light Clay 0.9% Miracle Seed 0.8% Iapapa Berry 0.4%

Abilities

Contrary99.9%Overgrow0.1%

Common Teammates

Landorus-Therian56.1%

Charizard-Mega-X15.0%

Diancie-Mega14.6%

Browse Gen 7 OU teams using Serperior →

Explore Serperior + Celesteela teams 39 score Explore Serperior + Heatran teams 36 score Explore Serperior + Magearna teams 30 score Explore Serperior + Greninja teams 23 score Explore Serperior + Kyurem-Black teams 22 score Explore Serperior + Ferrothorn teams 20 score

Leading observed checks

Open a matchup for a separate set-based damage estimate, or browse uploaded teams with both Pokémon.

Team core to explore

Serperior + Landorus-Therian 56.1% teammate usage Explore teams →

Checks & Counters

Observed target KO or switch rate is upstream p: the fraction of relevant encounters where the target was knocked out or switched out. Standard error is upstream d. The conservative score is p − 4d. These ladder observations do not prove a set-specific counter.

How to read this table

Use encounter count and standard error to judge the sample. Damage estimates below use inferred sets and remain separate from the observed ladder metric.

# Checker Encounters Conservative score Target KO or switch rate

Celesteela

SteelFlying DEFENSIVE CHECK View matchup

24.622

38.6

74.0% Standard error 8.84 points

DAMAGE CALC

252+ SpA Serperior Hidden Power Fire vs. 252 HP / 252+ SpD Celesteela: 72-86 (18 - 21.6%) -- possible 7HKO

View Celesteela counters → Teams with Celesteela →

Heatran

FireSteel OFFENSIVE CHECK View matchup

100.654

36.3

68.0% Standard error 7.92 points

DAMAGE CALC

252+ SpA Heatran Magma Storm vs. 252 HP / 252+ SpD Serperior: 270-318 (76.2 - 89.8%) -- guaranteed 2HKO after Leftovers recovery and trapping damage

View Heatran counters → Teams with Heatran →

Magearna

SteelFairy SOFT CHECK View matchup

260.925

30.5

51.6% Standard error 5.28 points

DAMAGE CALC

252+ SpA Magearna Fleur Cannon vs. 252 HP / 252+ SpD Serperior: 174-205 (49.1 - 57.9%) -- 59% chance to 2HKO after Leftovers recovery

View Magearna counters → Teams with Magearna →

Greninja

WaterDark SOFT CHECK View matchup

184.118

22.7

47.7% Standard error 6.24 points

DAMAGE CALC

252+ SpA Choice Specs Greninja Ice Beam vs. 252 HP / 252+ SpD Serperior: 204-242 (57.6 - 68.3%) -- guaranteed 2HKO after Leftovers recovery

View Greninja counters → Teams with Greninja →

Kyurem-Black

DragonIce OFFENSIVE CHECK View matchup

22.436

21.9

62.7% Standard error 10.21 points

DAMAGE CALC

252+ Atk Teravolt Kyurem-Black Freeze Shock vs. 252 HP / 0 Def Serperior: 642-756 (181.3 - 213.5%) -- guaranteed OHKO

View Kyurem-Black counters → Teams with Kyurem-Black →

Ferrothorn

GrassSteel SOFT CHECK View matchup

118.224

19.5

51.2% Standard error 7.91 points

DAMAGE CALC

252+ Atk Ferrothorn Knock Off (97.5 BP) vs. 252 HP / 0 Def Serperior: 97-115 (27.4 - 32.4%) -- guaranteed 4HKO

View Ferrothorn counters → Teams with Ferrothorn →

Victini

PsychicFire SOFT CHECK View matchup

30.13

11.0

47.4% Standard error 9.10 points

DAMAGE CALC

252+ Atk Victini V-create vs. 252 HP / 0 Def Serperior: 560-662 (158.1 - 187%) -- guaranteed OHKO

View Victini counters → Teams with Victini →

Tornadus-Therian

Flying SOFT CHECK View matchup

122.274

9.6

39.7% Standard error 7.54 points

DAMAGE CALC

252+ SpA Tornadus-Therian Hurricane vs. 252 HP / 252+ SpD Serperior: 264-312 (74.5 - 88.1%) -- guaranteed 2HKO after Leftovers recovery

View Tornadus-Therian counters → Teams with Tornadus-Therian →

Tapu Lele

PsychicFairy SOFT CHECK View matchup

21.844

8.0

50.8% Standard error 10.70 points

DAMAGE CALCPsychic Terrain

252+ SpA Choice Specs Tapu Lele Psyshock vs. 252 HP / 0 Def Serperior in Psychic Terrain: 337-397 (95.1 - 112.1%) -- 68.8% chance to OHKO

View Tapu Lele counters → Teams with Tapu Lele →

Tapu Koko

ElectricFairy SOFT CHECK View matchup

133.821

4.2

31.5% Standard error 6.84 points

DAMAGE CALCElectric Terrain

Tapu Koko Nature's Madness vs. 252 HP Serperior: 177-177 (50 - 50%) -- guaranteed 3HKO after Leftovers recovery

View Tapu Koko counters → Teams with Tapu Koko →

Medicham-Mega

FightingPsychic SOFT CHECK View matchup

53.2

3.4

40.8% Standard error 9.37 points

DAMAGE CALC

252+ Atk Pure Power Medicham-Mega High Jump Kick vs. 252 HP / 0 Def Serperior: 405-477 (114.4 - 134.7%) -- guaranteed OHKO

View Medicham-Mega counters →

Landorus-Therian

GroundFlying SOFT CHECK View matchup

209.075

-5.0

7.9% Standard error 3.22 points

DAMAGE CALC

252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Serperior: 338-398 (95.4 - 112.4%) -- 75% chance to OHKO

View Landorus-Therian counters → Teams with Landorus-Therian →

Latias-Mega

DragonPsychic SOFT CHECK View matchup

25.827

-5.5

30.8% Standard error 9.09 points

DAMAGE CALC

252+ SpA Latias-Mega Draco Meteor vs. 252 HP / 252+ SpD Serperior: 184-217 (51.9 - 61.2%) -- 96.1% chance to 2HKO after Leftovers recovery

View Latias-Mega counters →

Kartana

GrassSteel SOFT CHECK View matchup

85.765

-5.6

27.5% Standard error 8.26 points

DAMAGE CALC

252+ Atk Kartana Giga Impact vs. 252 HP / 0 Def Serperior: 241-284 (68 - 80.2%) -- guaranteed 2HKO after Leftovers recovery

View Kartana counters → Teams with Kartana →

Chansey

Normal SOFT CHECK View matchup

58.931

-6.9

19.0% Standard error 6.48 points

DAMAGE CALC

Chansey Seismic Toss vs. 252 HP Serperior: 100-100 (28.2 - 28.2%) -- guaranteed 5HKO after Leftovers recovery

View Chansey counters → Teams with Chansey →

Swampert-Mega

WaterGround SOFT CHECK View matchup

94.956

-7.0

22.7% Standard error 7.44 points

DAMAGE CALC

252+ Atk Swampert-Mega Ice Punch vs. 252 HP / 0 Def Serperior: 210-248 (59.3 - 70%) -- guaranteed 2HKO after Leftovers recovery

View Swampert-Mega counters →

Toxapex

PoisonWater SOFT CHECK View matchup

96.751

-7.7

19.5% Standard error 6.80 points

DAMAGE CALC

0- Atk Toxapex Knock Off (97.5 BP) vs. 252 HP / 0 Def Serperior: 45-54 (12.7 - 15.2%) -- possible 7HKO

View Toxapex counters → Teams with Toxapex →

Excadrill

GroundSteel SOFT CHECK View matchup

52.4

-9.2

24.0% Standard error 8.29 points

DAMAGE CALC

252+ Atk Excadrill Iron Head vs. 252 HP / 0 Def Serperior: 154-183 (43.5 - 51.6%) -- guaranteed 3HKO after Leftovers recovery

View Excadrill counters → Teams with Excadrill →

Diancie-Mega

RockFairy SOFT CHECK View matchup

29.784

-10.9

4.8% Standard error 3.93 points

DAMAGE CALC

0- Atk Diancie-Mega Diamond Storm vs. 252 HP / 0 Def Serperior: 153-180 (43.2 - 50.8%) -- guaranteed 3HKO after Leftovers recovery

View Diancie-Mega counters →

Tapu Fini

WaterFairy SOFT CHECK View matchup

87.276

-12.1

11.7% Standard error 5.95 points

DAMAGE CALCMisty Terrain

Tapu Fini Nature's Madness vs. 252 HP Serperior: 177-177 (50 - 50%) -- guaranteed 3HKO after Leftovers recovery

View Tapu Fini counters → Teams with Tapu Fini →

Clefable

Fairy SOFT CHECK View matchup

20.566

-14.9

21.0% Standard error 8.98 points

DAMAGE CALC

252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Serperior: 102-121 (28.8 - 34.1%) -- 99.1% chance to 4HKO after Leftovers recovery

View Clefable counters → Teams with Clefable →

Ranked #15 with 10.12% usage. Sorted by conservative score.