Is Keldeo viable in Gen 6 OU?

Keldeo is ranked #9 in Gen 6 OU with 16.88% usage according to Smogon May 2026 - Jul 2026 data.

What beats Keldeo in Gen 6 OU?

Serperior has the strongest conservative score in this observed May 2026 - Jul 2026 sample. The target was knocked out or switched out in 81.6% of 91.14774706584151 relevant encounters. Standard error is 5.7 points. Sets and switch conditions can change the result.

How are Keldeo matchup checks ranked in Gen 6 OU?

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

Keldeo counters

Gen 6 OU · Sorted by p − 4 standard errors · Smogon source period May 2026 - Jul 2026 · Generated 2026-08-05

#0647 Keldeo

WaterFighting

USAGE 16.9% #9

BASE STATS

HP 91

ATK 72

DEF 90

SPA 129

SPD 90

SPE 108

BST580

TYPE MATCHUPS

2×

ElectricGrassFlyingPsychicFairy

½×

FireWaterIceBugRockDarkSteel

Moves

Secret Sword 97.5% Scald 94.0% Hydro Pump 54.9% Calm Mind 31.5% Substitute 27.2% Focus Blast 17.8% Icy Wind 17.8% Rest 12.9%

Items

Choice Specs 47.9% Leftovers 38.7% Choice Scarf 7.2% Mystic Water 4.1% Weakness Policy 0.6% Expert Belt 0.5% Life Orb 0.4% Chesto Berry 0.1%

Common Teammates

Excadrill48.1%

Garchomp33.2%

Landorus-Therian27.3%

Browse Gen 6 OU teams using Keldeo →

Explore Keldeo + Serperior teams 59 score Explore Keldeo + Clefable teams 34 score Explore Keldeo + Tornadus-Therian teams 15 score Explore Keldeo + Slowbro teams 13 score Explore Keldeo + Keldeo 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

Keldeo + Excadrill 48.1% 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

Serperior

Grass DEFENSIVE CHECK View matchup

91.148

58.7

81.6% Standard error 5.74 points

DAMAGE CALC

252+ SpA Choice Specs Keldeo Focus Blast vs. 252 HP / 252+ SpD Serperior: 238-282 (67.2 - 79.6%) -- guaranteed 2HKO

View Serperior counters → Teams with Serperior →

Metagross-Mega

SteelPsychic DEFENSIVE CHECK View matchup

20.811

44.4

79.7% Standard error 8.82 points

DAMAGE CALC

252+ SpA Choice Specs Keldeo Focus Blast vs. 252 HP / 252+ SpD Metagross-Mega: 217-256 (59.6 - 70.3%) -- guaranteed 2HKO

View Metagross-Mega counters →

Clefable

Fairy DEFENSIVE CHECK View matchup

73.49

34.0

65.3% Standard error 7.83 points

DAMAGE CALC

252+ SpA Choice Specs Keldeo Hydro Pump vs. 252 HP / 252+ SpD Clefable: 228-268 (57.8 - 68%) -- guaranteed 2HKO after Leftovers recovery

View Clefable counters → Teams with Clefable →

Tornadus-Therian

Flying SOFT CHECK View matchup

95.257

14.9

49.4% Standard error 8.65 points

DAMAGE CALC

0- SpA Tornadus-Therian Hurricane vs. 252 HP / 252+ SpD Keldeo: 180-212 (46.6 - 54.9%) -- 66% chance to 2HKO

View Tornadus-Therian counters → Teams with Tornadus-Therian →

Slowbro

WaterPsychic SOFT CHECK View matchup

50.949

13.4

52.6% Standard error 9.82 points

DAMAGE CALC

252+ SpA Slowbro Future Sight vs. 252 HP / 252+ SpD Keldeo: 278-330 (72 - 85.4%) -- guaranteed 2HKO

View Slowbro counters → Teams with Slowbro →

Keldeo

WaterFighting SOFT CHECK View matchup

54.837

9.4

47.3% Standard error 9.48 points

DAMAGE CALC

252+ SpA Choice Specs Keldeo Secret Sword vs. 252 HP / 0 Def Keldeo: 249-294 (64.5 - 76.1%) -- guaranteed 2HKO

View Keldeo counters → Teams with Keldeo →

Zapdos

ElectricFlying SOFT CHECK View matchup

70.042

-0.9

29.1% Standard error 7.50 points

DAMAGE CALC

252+ SpA Zapdos Thunderbolt vs. 252 HP / 252+ SpD Keldeo: 242-288 (62.6 - 74.6%) -- guaranteed 2HKO

View Zapdos counters → Teams with Zapdos →

Volcanion

FireWater SOFT CHECK View matchup

29.642

-1.9

32.5% Standard error 8.60 points

DAMAGE CALC

252+ SpA Volcanion Hidden Power Grass vs. 252 HP / 252+ SpD Keldeo: 112-132 (29 - 34.1%) -- 2.5% chance to 3HKO

View Volcanion counters → Teams with Volcanion →

Ferrothorn

GrassSteel SOFT CHECK View matchup

27.996

-2.2

33.5% Standard error 8.92 points

DAMAGE CALC

252+ Atk Ferrothorn Power Whip vs. 252 HP / 0 Def Keldeo: 378-446 (97.9 - 115.5%) -- 87.5% chance to OHKO

View Ferrothorn counters → Teams with Ferrothorn →

Excadrill

GroundSteel SOFT CHECK View matchup

142.142

-3.2

19.5% Standard error 5.67 points

DAMAGE CALC

252+ Atk Excadrill Earthquake vs. 252 HP / 0 Def Keldeo: 202-238 (52.3 - 61.6%) -- guaranteed 2HKO

View Excadrill counters → Teams with Excadrill →

Weavile

DarkIce SOFT CHECK View matchup

36.611

-3.6

25.1% Standard error 7.17 points

DAMAGE CALC

252+ Atk Choice Band Weavile Knock Off (97.5 BP) vs. 252 HP / 0 Def Keldeo: 135-159 (34.9 - 41.1%) -- guaranteed 3HKO

View Weavile counters → Teams with Weavile →

Garchomp

DragonGround SOFT CHECK View matchup

32.907

-4.8

25.6% Standard error 7.61 points

DAMAGE CALC

252+ Atk Garchomp Outrage vs. 252 HP / 0 Def Keldeo: 235-277 (60.8 - 71.7%) -- guaranteed 2HKO

View Garchomp counters → Teams with Garchomp →

Kyurem-Black

DragonIce SOFT CHECK View matchup

21.288

-8.7

31.6% Standard error 10.07 points

DAMAGE CALC

252+ Atk Kyurem-Black Fusion Bolt vs. 252 HP / 0 Def Keldeo: 320-378 (82.9 - 97.9%) -- guaranteed 2HKO

View Kyurem-Black counters →

Bisharp

DarkSteel SOFT CHECK View matchup

28.159

-11.4

16.7% Standard error 7.03 points

DAMAGE CALC

252+ Atk Black Glasses Bisharp Knock Off (97.5 BP) vs. 252 HP / 0 Def Keldeo: 111-132 (28.7 - 34.1%) -- 2.3% chance to 3HKO

View Bisharp counters → Teams with Bisharp →

Heatran

FireSteel SOFT CHECK View matchup

55.204

-11.5

5.3% Standard error 4.20 points

DAMAGE CALC

252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Keldeo: 84-99 (21.7 - 25.6%) -- 1.5% chance to 4HKO

View Heatran counters → Teams with Heatran →

Landorus-Therian

GroundFlying SOFT CHECK View matchup

83.009

-11.8

13.2% Standard error 6.24 points

DAMAGE CALC

252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Keldeo: 354-417 (91.7 - 108%) -- 50% chance to OHKO

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

Tyranitar

RockDark SOFT CHECK View matchup

51.701

-13.2

7.7% Standard error 5.25 points

DAMAGE CALCSand

252+ Atk Tyranitar Superpower vs. 252 HP / 0 Def Keldeo: 161-190 (41.7 - 49.2%) -- 83.6% chance to 2HKO after sandstorm damage

View Tyranitar counters → Teams with Tyranitar →

Rotom-Wash

ElectricWater SOFT CHECK View matchup

22.306

-13.5

21.1% Standard error 8.63 points

DAMAGE CALC

252+ SpA Rotom-Wash Volt Switch vs. 252 HP / 252+ SpD Keldeo: 168-200 (43.5 - 51.8%) -- 11.3% chance to 2HKO

View Rotom-Wash counters → Teams with Rotom-Wash →

Scizor-Mega

BugSteel SOFT CHECK View matchup

20.354

-14.6

22.3% Standard error 9.23 points

DAMAGE CALC

252+ Atk Scizor-Mega Superpower vs. 252 HP / 0 Def Keldeo: 175-206 (45.3 - 53.3%) -- 35.5% chance to 2HKO

View Scizor-Mega counters →

Ranked #9 with 16.88% usage. Sorted by conservative score.