Is Gastrodon viable in Gen 7 OU?

Gastrodon is ranked #37 in Gen 7 OU with 5.16% usage according to Smogon Jul 2026 - Sep 2026 data.

What beats Gastrodon in Gen 7 OU?

Medicham-Mega has the strongest conservative score in this observed Jul 2026 - Sep 2026 sample. The target was knocked out or switched out in 89.8% of 48.464546635078165 relevant encounters. Standard error is 4.3 points. Sets and switch conditions can change the result.

How are Gastrodon 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 Gastrodon was knocked out or switched out. This is not a set-specific battle guarantee.

Gastrodon counters

Gen 7 OU · Smogon source period Jul 2026 - Sep 2026

#0423 Gastrodon

WaterGround

USAGE 5.2% #37

ABILITYStorm Drain

BASE STATS

HP 111

ATK 83

DEF 68

SPA 92

SPD 82

SPE 39

BST475

TYPE MATCHUPS

4×

Grass

½×

FirePoisonRockSteel

0×

Electric

Moves

Recover 100.0% Scald 95.8% Clear Smog 76.3% Earthquake 63.6% Earth Power 32.4% Toxic 20.8% Counter 6.8% Protect 3.5%

Items

Leftovers 100.0% Eject Button 0.0% Rocky Helmet 0.0% Rindo Berry 0.0% Choice Specs 0.0% Sitrus Berry 0.0% Life Orb 0.0% Shed Shell 0.0%

Abilities

Storm Drain99.8%Sticky Hold0.2%Sand Force0.0%

Common Teammates

Tornadus-Therian13.1%

Leading observed checks

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

Team core to explore

Gastrodon + Clefable 79.1% 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

Medicham-Mega

FightingPsychic OFFENSIVE CHECK View matchup

48.465

72.5

89.8% Standard error 4.34 points

DAMAGE CALC

252+ Atk Pure Power Medicham-Mega High Jump Kick vs. 252 HP / 0 Def Gastrodon: 532-627 (124.8 - 147.1%) -- guaranteed OHKO

View Medicham-Mega counters →

Ferrothorn

GrassSteel DEFENSIVE CHECK View matchup

67.502

63.2

81.9% Standard error 4.68 points

DAMAGE CALC

252+ SpA Gastrodon Earth Power vs. 252 HP / 252+ SpD Ferrothorn: 84-99 (23.8 - 28.1%) -- possible 5HKO

View Ferrothorn counters → Teams with Ferrothorn →

Landorus-Therian

GroundFlying SOFT CHECK View matchup

87.752

18.8

39.7% Standard error 5.22 points

DAMAGE CALC

252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Gastrodon: 444-523 (104.2 - 122.7%) -- guaranteed OHKO

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

Tangrowth

Grass SOFT CHECK View matchup

85.702

18.8

39.9% Standard error 5.29 points

DAMAGE CALC

0- SpA Tangrowth Energy Ball vs. 252 HP / 252+ SpD Gastrodon: 312-372 (73.2 - 87.3%) -- guaranteed 2HKO after Leftovers recovery

View Tangrowth counters →

Tapu Fini

WaterFairy SOFT CHECK View matchup

60.337

15.8

41.1% Standard error 6.33 points

DAMAGE CALCMisty Terrain

Tapu Fini Nature's Madness vs. 252 HP Gastrodon: 213-213 (50 - 50%) -- guaranteed 3HKO after Leftovers recovery

View Tapu Fini counters → Teams with Tapu Fini →

Clefable

Fairy SOFT CHECK View matchup

64.431

15.3

39.7% Standard error 6.10 points

DAMAGE CALC

252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Gastrodon: 112-133 (26.2 - 31.2%) -- 15.2% chance to 4HKO after Leftovers recovery

View Clefable counters → Teams with Clefable →

Magearna

SteelFairy SOFT CHECK View matchup

101.607

12.0

30.2% Standard error 4.56 points

DAMAGE CALC

252+ SpA Magearna Fleur Cannon vs. 252 HP / 252+ SpD Gastrodon: 190-225 (44.6 - 52.8%) -- guaranteed 3HKO after Leftovers recovery

View Magearna counters → Teams with Magearna →

Toxapex

PoisonWater SOFT CHECK View matchup

28.136

8.9

46.5% Standard error 9.40 points

DAMAGE CALC

0- Atk Toxapex Knock Off (97.5 BP) vs. 252 HP / 0 Def Gastrodon: 59-70 (13.8 - 16.4%) -- possible 7HKO

View Toxapex counters → Teams with Toxapex →

Chansey

Normal SOFT CHECK View matchup

24.736

8.5

48.7% Standard error 10.05 points

DAMAGE CALC

Chansey Seismic Toss vs. 252 HP Gastrodon: 100-100 (23.4 - 23.4%) -- guaranteed 6HKO after Leftovers recovery

View Chansey counters → Teams with Chansey →

Greninja

WaterDark SOFT CHECK View matchup

135.31

7.5

21.6% Standard error 3.54 points

DAMAGE CALC

252+ SpA Choice Specs Greninja Dark Pulse vs. 252 HP / 252+ SpD Gastrodon: 150-177 (35.2 - 41.5%) -- 77.1% chance to 3HKO after Leftovers recovery

View Greninja counters → Teams with Greninja →

Latias-Mega

DragonPsychic SOFT CHECK View matchup

20.124

6.4

51.0% Standard error 11.14 points

DAMAGE CALC

252+ SpA Latias-Mega Draco Meteor vs. 252 HP / 252+ SpD Gastrodon: 202-238 (47.4 - 55.8%) -- 22.7% chance to 2HKO after Leftovers recovery

View Latias-Mega counters →

Tapu Koko

ElectricFairy SOFT CHECK View matchup

100.417

-0.3

13.1% Standard error 3.37 points

DAMAGE CALCElectric Terrain

Tapu Koko Nature's Madness vs. 252 HP Gastrodon: 213-213 (50 - 50%) -- guaranteed 3HKO after Leftovers recovery

View Tapu Koko counters → Teams with Tapu Koko →

Heatran

FireSteel SOFT CHECK View matchup

114.839

-3.2

4.9% Standard error 2.02 points

DAMAGE CALC

252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Gastrodon: 89-105 (20.8 - 24.6%) -- possible 6HKO

View Heatran counters → Teams with Heatran →

Ranked #37 with 5.16% usage. Sorted by conservative score.