Is Serperior viable in Gen 7 OU?

Serperior is ranked #21 in Gen 7 OU with 8.49% usage according to Smogon Feb 2026 - Apr 2026 data.

What beats Serperior in Gen 7 OU?

The best counter for Serperior in Gen 7 OU is Kyurem-Black with a 80.5% win rate when they meet. Based on Smogon's Feb 2026 - Apr 2026 usage data, the top Pokémon that beat Serperior include Kyurem-Black, Heatran, Tapu Lele, Celesteela, Tornadus-Therian.

What is the best counter for Serperior in Gen 7 OU?

Kyurem-Black is the best counter for Serperior in Gen 7 OU, KOing or forcing it out in 80.5% of their encounters.

Serperior counters

Gen 7 OU · Sorted by reliability score · Smogon · Feb 2026 - Apr 2026

#0497 Serperior

Grass

USAGE 8.5% #21

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 99.9% Glare 74.9% Defog 48.7% Hidden Power Fire 39.5% Taunt 34.4% Substitute 32.8% Leech Seed 28.2% Knock Off 20.6%

Items

Leftovers 38.9% Rocky Helmet 22.9% Choice Scarf 22.4% Wiki Berry 5.0% Grassium Z 3.8% Miracle Seed 2.4% Light Clay 1.0% Meadow Plate 0.9%

Abilities

Contrary99.9%Overgrow0.1%

Common Teammates

Landorus-Therian47.1%

Checks & Counters

Ranked by reliability — blends KO rate with how often each Pokémon is matched up.

# Checker Encounters Reliability KO Rate

Kyurem-Black

DragonIce OFFENSIVE CHECK

26.017

80.5% dies 7.77%

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 →

Heatran

FireSteel OFFENSIVE CHECK

92.536

69.0% dies 8.11%

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 →

Tapu Lele

PsychicFairy OFFENSIVE CHECK

20.795

64.2% dies 10.51%

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 →

Celesteela

SteelFlying SOFT CHECK

22.283

52.2% dies 10.58%

DAMAGE CALC

252+ Atk Celesteela Explosion vs. 252 HP / 0 Def Serperior: 262-309 (74 - 87.2%) -- guaranteed 2HKO after Leftovers recovery

View Celesteela counters → Teams with Celesteela →

Tornadus-Therian

Flying SOFT CHECK

85.822

50.7% dies 9.28%

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 →

Victini

PsychicFire SOFT CHECK

27.738

48.4% dies 9.49%

DAMAGE CALC

252+ Atk Choice Band Victini V-create vs. 252 HP / 0 Def Serperior: 842-992 (237.8 - 280.2%) -- guaranteed OHKO

View Victini counters → Teams with Victini →

Magearna

SteelFairy SOFT CHECK

163.588

46.1% dies 6.71%

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

124.357

44.1% dies 7.53%

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 →

Kartana

GrassSteel SOFT CHECK

55.704

39.7% dies 9.23%

DAMAGE CALC

252+ Atk Kartana Smart Strike vs. 252 HP / 0 Def Serperior: 169-199 (47.7 - 56.2%) -- 28.9% chance to 2HKO after Leftovers recovery

View Kartana counters → Teams with Kartana →

Excadrill

GroundSteel SOFT CHECK

52.724

38.8% dies 9.46%

DAMAGE CALC

252+ Atk Mold Breaker 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 →

Ferrothorn

GrassSteel SOFT CHECK

31.854

37.3% dies 8.57%

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 →

Medicham-Mega

FightingPsychic SOFT CHECK

27.026

31.5% dies 8.94%

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 → Teams with Medicham-Mega →

Tapu Koko

ElectricFairy SOFT CHECK

123.14

30.6% dies 7.07%

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 →

Chansey

Normal SOFT CHECK

42.734

26.1% dies 9.33%

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

21.381

16.1% dies 7.95%

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 → Teams with Swampert-Mega →

Toxapex

PoisonWater SOFT CHECK

81.641

16.0% dies 6.87%

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 →

Gliscor

GroundFlying SOFT CHECK

20.563

8.7% dies 6.20%

DAMAGE CALC

252+ Atk Gliscor Knock Off (97.5 BP) vs. 252 HP / 0 Def Serperior: 98-116 (27.6 - 32.7%) -- guaranteed 4HKO

View Gliscor counters → Teams with Gliscor →

Keldeo

WaterFighting SOFT CHECK

21.397

8.1% dies 5.91%

DAMAGE CALC

252+ SpA Keldeo Secret Sword vs. 252 HP / 0 Def Serperior: 159-187 (44.9 - 52.8%) -- guaranteed 3HKO after Leftovers recovery

View Keldeo counters → Teams with Keldeo →

Tapu Fini

WaterFairy SOFT CHECK

48.208

7.2% dies 4.75%

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 →

Landorus-Therian

GroundFlying SOFT CHECK

141.831

6.3% dies 3.50%

DAMAGE CALC

252+ Atk Landorus-Therian U-turn vs. 252 HP / 0 Def Serperior: 192-226 (54.2 - 63.8%) -- guaranteed 2HKO after Leftovers recovery

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

Ranked #21 with 8.49% usage. Sorted by reliability score.