Is Serperior viable in Gen 9 National Dex?

Serperior is ranked #78 in Gen 9 National Dex with 1.66% usage according to Smogon Apr 2026 - Jun 2026 data.

What beats Serperior in Gen 9 National Dex?

The best counter for Serperior in Gen 9 National Dex is Kingambit with a 69.4% win rate when they meet. Based on Smogon's Apr 2026 - Jun 2026 usage data, the top Pokémon that beat Serperior include Kingambit, Gholdengo, Ogerpon-Wellspring, Gliscor, Landorus-Therian.

What is the best counter for Serperior in Gen 9 National Dex?

Kingambit is the best counter for Serperior in Gen 9 National Dex, KOing or forcing it out in 69.4% of their encounters.

Serperior counters

Gen 9 National Dex · Sorted by reliability score · Smogon · Apr 2026 - Jun 2026

#0497 Serperior

Grass

USAGE 1.7% #78

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 100.0% Substitute 76.7% Glare 70.7% Hidden Power Fire 58.9% Leech Seed 31.5% Dragon Pulse 19.6% Hidden Power Rock 12.4% Defog 6.2%

Items

Leftovers 77.5% Focus Sash 5.1% Choice Scarf 3.1% Heavy-Duty Boots 2.3% Grassium Z 1.9% Normalium Z 1.7% Rocky Helmet 1.6% Choice Specs 1.4%

Abilities

Contrary99.8%Overgrow0.2%

Common Teammates

Scizor-Mega28.0%

Kommo-o22.3%

Grimmsnarl22.2%

Talonflame21.1%

Gastrodon19.7%

Volcarona19.4%

Gholdengo19.3%

Landorus-Therian16.0%

Checks & Counters

Reliability ranks observed matchups; KO rate is how often the checker knocked out or forced out the target. “Checker faints” reports the checker's own observed death rate. Categories use matchup reliability plus offensive and defensive base stats.

How to read this table

Use encounter count to judge sample size. A high-reliability check with a modest KO rate can still be useful when it consistently forces switches or limits the target.

# Checker Encounters Reliability KO Rate

Kingambit

DarkSteel DEFENSIVE COUNTER

21.271

69.4% checker faints 10.00%

DAMAGE CALC

252+ SpA Serperior Hidden Power Fire vs. 252 HP / 252+ SpD Kingambit: 80-96 (19.8 - 23.7%) -- possible 5HKO

View Kingambit counters → Teams with Kingambit →

Gholdengo

SteelGhost SOFT CHECK

26.483

52.3% checker faints 9.71%

DAMAGE CALC

252+ SpA Gholdengo Make It Rain vs. 252 HP / 252+ SpD Serperior: 163-193 (46 - 54.5%) -- 7.4% chance to 2HKO after Leftovers recovery

View Gholdengo counters → Teams with Gholdengo →

Ogerpon-Wellspring

GrassWater SOFT CHECK

32.793

16.6% checker faints 6.50%

DAMAGE CALC

252+ Atk Wellspring Mask Ogerpon-Wellspring U-turn vs. 252 HP / 0 Def Serperior: 200-236 (56.4 - 66.6%) -- guaranteed 2HKO after Leftovers recovery

View Ogerpon-Wellspring counters → Teams with Ogerpon-Wellspring →

Gliscor

GroundFlying SOFT CHECK

47.469

9.8% checker faints 6.11%

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 →

Landorus-Therian

GroundFlying SOFT CHECK

34.378

7.1% checker faints 4.38%

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 →

Alomomola

Water SOFT CHECK

44.08

2.7% checker faints 3.38%

DAMAGE CALC

252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 0 Def Serperior: 85-100 (24 - 28.2%) -- 96.4% chance to 4HKO

View Alomomola counters → Teams with Alomomola →

Ranked #78 with 1.66% usage. Sorted by reliability score.