Is Ferrothorn viable in Gen 9 National Dex Ubers?

Ferrothorn is ranked #26 in Gen 9 National Dex Ubers with 5.20% usage according to Smogon May 2026 - Jul 2026 data.

What beats Ferrothorn in Gen 9 National Dex Ubers?

Groudon-Primal has the strongest conservative score in this observed May 2026 - Jul 2026 sample. The target was knocked out or switched out in 82.7% of 372.1491614571518 relevant encounters. Standard error is 3.3 points. Sets and switch conditions can change the result.

How are Ferrothorn matchup checks ranked in Gen 9 National Dex Ubers?

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

Ferrothorn counters

Gen 9 National Dex Ubers · Sorted by p − 4 standard errors · Smogon source period May 2026 - Jul 2026 · Generated 2026-08-05

#0598 Ferrothorn

GrassSteel

USAGE 5.2% #26

ABILITYIron Barbs

BASE STATS

HP 74

ATK 94

DEF 131

SPA 54

SPD 116

SPE 20

BST489

TYPE MATCHUPS

4×

Fire

2×

Fighting

½×

NormalWaterElectricPsychicRockDragonSteelFairy

¼×

Grass

0×

Poison

Moves

Leech Seed 98.4% Spikes 77.2% Knock Off 77.1% Protect 49.3% Power Whip 42.8% Stealth Rock 21.0% Gyro Ball 15.6% Toxic 8.3%

Items

Leftovers 92.3% Rocky Helmet 6.3% Assault Vest 1.0% Heavy-Duty Boots 0.2% Sitrus Berry 0.1% Mental Herb 0.1% Choice Band 0.0% Metronome 0.0%

Abilities

Iron Barbs100.0%Anticipation0.0%

Tera Types

Grass 31.8% Water 30.3% Poison 26.0% Flying 5.3% Fairy 3.7% Ghost 1.0% Dragon 0.8% Bug 0.6%

Common Teammates

Leading observed checks

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

Team core to explore

Ferrothorn + Zygarde 62.3% 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

Groudon-Primal

GroundFire OFFENSIVE CHECK View matchup

372.149

69.4

82.7% Standard error 3.35 points

DAMAGE CALCHarsh Sunshine

252+ Atk Groudon-Primal Heat Crash (120 BP) vs. 252 HP / 0 Def Ferrothorn in Harsh Sunshine: 1312-1548 (372.7 - 439.7%) -- guaranteed OHKO

View Groudon-Primal counters → Teams with Groudon-Primal →

Zacian-Crowned

FairySteel OFFENSIVE CHECK View matchup

138.103

58.8

81.3% Standard error 5.62 points

DAMAGE CALC

+1 252+ Atk Zacian-Crowned Close Combat vs. 252 HP / 0 Def Ferrothorn: 380-448 (107.9 - 127.2%) -- guaranteed OHKO

View Zacian-Crowned counters → Teams with Zacian-Crowned →

Ho-Oh

FireFlying DEFENSIVE CHECK View matchup

239.533

51.7

71.5% Standard error 4.95 points

DAMAGE CALC

252+ Atk Ferrothorn Knock Off (97.5 BP) vs. 252 HP / 252+ Def Ho-Oh: 72-85 (17.3 - 20.4%) -- possible 5HKO

View Ho-Oh counters → Teams with Ho-Oh →

Shaymin-Sky

GrassFlying OFFENSIVE CHECK View matchup

29.471

47.1

77.8% Standard error 7.66 points

DAMAGE CALC

252+ SpA Shaymin-Sky Air Slash vs. 252 HP / 252+ SpD Ferrothorn: 84-99 (23.8 - 28.1%) -- possible 5HKO

View Shaymin-Sky counters →

Marshadow

FightingGhost OFFENSIVE CHECK View matchup

94.86

44.9

75.3% Standard error 7.61 points

DAMAGE CALC

252+ Atk Marshadow Close Combat vs. 252 HP / 0 Def Ferrothorn: 332-392 (94.3 - 111.3%) -- 62.5% chance to OHKO

View Marshadow counters → Teams with Marshadow →

Arceus-Dark

Dark DEFENSIVE CHECK View matchup

44.318

25.3

55.1% Standard error 7.47 points

DAMAGE CALC

252+ Atk Ferrothorn Power Whip vs. 252 HP / 252+ Def Arceus-Dark: 109-130 (24.5 - 29.2%) -- 99.9% chance to 4HKO

View Arceus-Dark counters → Teams with Arceus-Dark →

Yveltal

DarkFlying SOFT CHECK View matchup

151.641

24.3

52.0% Standard error 6.93 points

DAMAGE CALC

0- Atk Life Orb Dark Aura Yveltal Knock Off (97.5 BP) vs. 252 HP / 0 Def Ferrothorn: 165-195 (46.8 - 55.3%) -- 74.2% chance to 2HKO

View Yveltal counters → Teams with Yveltal →

Eternatus

PoisonDragon SOFT CHECK View matchup

105.336

21.8

54.8% Standard error 8.26 points

DAMAGE CALC

252+ SpA Eternatus Fire Blast vs. 252 HP / 252+ SpD Ferrothorn: 372-440 (105.6 - 125%) -- guaranteed OHKO

View Eternatus counters → Teams with Eternatus →

Zygarde

DragonGround SOFT CHECK View matchup

209.56

12.6

34.7% Standard error 5.53 points

DAMAGE CALC

252+ Atk Zygarde Thousand Arrows vs. 252 HP / 0 Def Ferrothorn: 108-127 (30.6 - 36%) -- guaranteed 4HKO after Leftovers recovery

View Zygarde counters → Teams with Zygarde →

Ferrothorn

GrassSteel SOFT CHECK View matchup

57.692

11.9

49.0% Standard error 9.28 points

DAMAGE CALC

252+ Atk Ferrothorn Knock Off (97.5 BP) vs. 252 HP / 0 Def Ferrothorn: 74-88 (21 - 25%) -- 0.1% chance to 4HKO

View Ferrothorn counters →

Arceus-Ground

Ground SOFT CHECK View matchup

74.67

1.0

30.4% Standard error 7.34 points

DAMAGE CALC

252+ SpA Earth Plate Arceus-Ground Judgment vs. 252 HP / 252+ SpD Ferrothorn: 133-157 (37.7 - 44.6%) -- guaranteed 3HKO after Leftovers recovery

View Arceus-Ground counters → Teams with Arceus-Ground →

Kyogre-Primal

Water SOFT CHECK View matchup

111.032

-0.9

27.9% Standard error 7.19 points

DAMAGE CALCHeavy Rain

252+ SpA Kyogre-Primal Water Spout (150 BP) vs. 252 HP / 252+ SpD Ferrothorn in Heavy Rain: 168-198 (47.7 - 56.2%) -- 25.8% chance to 2HKO after Leftovers recovery

View Kyogre-Primal counters →

Giratina-Origin

GhostDragon SOFT CHECK View matchup

81.833

-1.5

24.8% Standard error 6.57 points

DAMAGE CALC

0- Atk Griseous Core Giratina-Origin Poltergeist vs. 252 HP / 0 Def Ferrothorn: 118-141 (33.5 - 40%) -- 28.7% chance to 3HKO after Leftovers recovery

View Giratina-Origin counters → Teams with Giratina-Origin →

Necrozma-Dusk-Mane

PsychicSteel SOFT CHECK View matchup

52.255

-3.7

33.1% Standard error 9.20 points

DAMAGE CALC

0- Atk Necrozma-Dusk-Mane Earthquake vs. 252 HP / 0 Def Ferrothorn: 76-90 (21.5 - 25.5%) -- possible 5HKO

View Necrozma-Dusk-Mane counters → Teams with Necrozma-Dusk-Mane →

Dondozo

Water SOFT CHECK View matchup

21.662

-8.5

31.4% Standard error 9.98 points

DAMAGE CALC

0 Def Dondozo Body Press vs. 252 HP / 0 Def Ferrothorn: 102-122 (28.9 - 34.6%) -- 99.8% chance to 4HKO after Leftovers recovery

View Dondozo counters → Teams with Dondozo →

Alomomola

Water SOFT CHECK View matchup

77.572

-9.3

9.3% Standard error 4.65 points

DAMAGE CALC

252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 0 Def Ferrothorn: 64-76 (18.1 - 21.5%) -- possible 5HKO

View Alomomola counters →

Arceus-Fairy

Fairy SOFT CHECK View matchup

27.257

-9.3

22.8% Standard error 8.04 points

DAMAGE CALC

252+ SpA Arceus-Fairy Earth Power vs. 252 HP / 252+ SpD Ferrothorn: 67-79 (19 - 22.4%) -- possible 6HKO

View Arceus-Fairy counters → Teams with Arceus-Fairy →

Deoxys-Speed

Psychic SOFT CHECK View matchup

20.086

-14.3

23.6% Standard error 9.47 points

DAMAGE CALC

252+ SpA Deoxys-Speed Psycho Boost vs. 252 HP / 252+ SpD Ferrothorn: 66-78 (18.7 - 22.1%) -- possible 6HKO

View Deoxys-Speed counters → Teams with Deoxys-Speed →

Ranked #26 with 5.20% usage. Sorted by conservative score.