Is Hydreigon viable in Gen 9 UU?

Hydreigon is ranked #27 in Gen 9 UU with 8.92% usage according to Smogon May 2026 - Jul 2026 data.

What beats Hydreigon in Gen 9 UU?

Slither Wing has the strongest conservative score in this observed May 2026 - Jul 2026 sample. The target was knocked out or switched out in 50.9% of 23.33429863196389 relevant encounters. Standard error is 10.3 points. Sets and switch conditions can change the result.

How are Hydreigon matchup checks ranked in Gen 9 UU?

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

Hydreigon counters

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

#0635 Hydreigon

DarkDragon

USAGE 8.9% #27

BASE STATS

HP 92

ATK 105

DEF 90

SPA 125

SPD 90

SPE 98

BST600

TYPE MATCHUPS

4×

Fairy

2×

IceFightingBugDragon

½×

FireWaterElectricGrassGhostDark

0×

Psychic

Moves

Dark Pulse 82.9% Draco Meteor 71.8% Flash Cannon 51.2% Nasty Plot 50.8% Flamethrower 42.7% Substitute 34.7% U-turn 26.9% Earth Power 10.6%

Items

Leftovers 52.4% Choice Scarf 22.9% Choice Specs 19.6% Rocky Helmet 1.3% Assault Vest 1.0% Chople Berry 0.5% Eject Pack 0.5% Salac Berry 0.4%

Tera Types

Steel 59.0% Poison 18.6% Fire 6.1% Dragon 6.0% Fairy 5.2% Dark 3.3% Ghost 1.2% Ground 0.4%

Common Teammates

Browse Gen 9 UU teams using Hydreigon →

Explore Hydreigon + Slither Wing teams 9 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

Hydreigon + Excadrill 19.7% 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

Slither Wing

BugFighting SOFT CHECK View matchup

23.334

9.5

50.9% Standard error 10.35 points

DAMAGE CALC

252+ Atk Slither Wing Close Combat vs. 252 HP / 0 Def Hydreigon: 486-572 (125.2 - 147.4%) -- guaranteed OHKO

View Slither Wing counters → Teams with Slither Wing →

Latios

DragonPsychic SOFT CHECK View matchup

22.061

-0.8

41.1% Standard error 10.48 points

DAMAGE CALC

252+ SpA Soul Dew Latios Draco Meteor vs. 252 HP / 252+ SpD Hydreigon: 432-510 (111.3 - 131.4%) -- guaranteed OHKO

View Latios counters →

Mandibuzz

DarkFlying SOFT CHECK View matchup

22.823

-11.7

24.1% Standard error 8.95 points

DAMAGE CALC

252+ Atk Mandibuzz U-turn vs. 252 HP / 0 Def Hydreigon: 118-140 (30.4 - 36%) -- guaranteed 4HKO after Leftovers recovery

View Mandibuzz counters →

Ranked #27 with 8.92% usage. Sorted by conservative score.