Is Swampert-Mega viable in Gen 7 OU?

Swampert-Mega is ranked #12 in Gen 7 OU with 12.71% usage according to Smogon Jul 2026 - Sep 2026 data.

What beats Swampert-Mega in Gen 7 OU?

Kartana has the strongest conservative score in this observed Jul 2026 - Sep 2026 sample. The target was knocked out or switched out in 69.4% of 115.32221693897516 relevant encounters. Standard error is 4.3 points. Sets and switch conditions can change the result.

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

Swampert-Mega counters

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

#0260 Swampert-Mega

WaterGround

USAGE 12.7% #12

ABILITYSwift Swim

BASE STATS

HP 100

ATK 150

DEF 110

SPA 95

SPD 110

SPE 70

BST635

TYPE MATCHUPS

4×

Grass

½×

FirePoisonRockSteel

0×

Electric

Moves

Earthquake 99.4% Waterfall 98.1% Ice Punch 75.9% Power-Up Punch 52.4% Stealth Rock 25.7% Toxic 20.9% Superpower 12.0% Substitute 8.8%

Items

Swampertite 100.0%

Abilities

Swift Swim100.0%

Common Teammates

Tornadus-Therian45.8%

Hawlucha45.5%

Magearna20.8%

Manaphy19.6%

Leading observed checks

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

Team core to explore

Swampert-Mega + Pelipper 98.5% 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

Kartana

GrassSteel OFFENSIVE CHECK View matchup

115.322

52.2

69.4% Standard error 4.29 points

DAMAGE CALC

252+ Atk Kartana Leaf Blade vs. 252 HP / 0 Def Swampert-Mega: 768-904 (190 - 223.7%) -- guaranteed OHKO

View Kartana counters → Teams with Kartana →

Serperior

Grass DEFENSIVE CHECK View matchup

32.531

40.1

71.7% Standard error 7.90 points

DAMAGE CALC

252+ Atk Swampert-Mega Ice Punch vs. 252 HP / 252+ Def Serperior: 150-178 (42.3 - 50.2%) -- guaranteed 3HKO after Leftovers recovery

View Serperior counters → Teams with Serperior →

Skarmory

SteelFlying DEFENSIVE CHECK View matchup

60.874

33.7

58.9% Standard error 6.31 points

DAMAGE CALC

252+ Atk Swampert-Mega Waterfall vs. 252 HP / 252+ Def Skarmory: 91-108 (27.2 - 32.3%) -- guaranteed 4HKO

View Skarmory counters →

Medicham-Mega

FightingPsychic SOFT CHECK View matchup

163.573

32.2

47.8% Standard error 3.91 points

DAMAGE CALC

252+ Atk Pure Power Medicham-Mega High Jump Kick vs. 252 HP / 0 Def Swampert-Mega: 357-421 (88.3 - 104.2%) -- 25% chance to OHKO

View Medicham-Mega counters →

Rotom-Wash

ElectricWater OFFENSIVE CHECK View matchup

58.687

31.5

57.3% Standard error 6.46 points

DAMAGE CALC

252+ SpA Rotom-Wash Hydro Pump vs. 252 HP / 252+ SpD Swampert-Mega: 115-136 (28.4 - 33.6%) -- 0.5% chance to 3HKO

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

Greninja

WaterDark SOFT CHECK View matchup

182.252

27.8

42.4% Standard error 3.66 points

DAMAGE CALC

252+ SpA Choice Specs Greninja Hydro Pump vs. 252 HP / 252+ SpD Swampert-Mega: 169-201 (41.8 - 49.7%) -- guaranteed 3HKO

View Greninja counters → Teams with Greninja →

Ferrothorn

GrassSteel SOFT CHECK View matchup

143.672

27.5

44.0% Standard error 4.14 points

DAMAGE CALC

252+ Atk Ferrothorn Power Whip vs. 252 HP / 0 Def Swampert-Mega: 640-756 (158.4 - 187.1%) -- guaranteed OHKO

View Ferrothorn counters → Teams with Ferrothorn →

Tangrowth

Grass SOFT CHECK View matchup

114.506

22.8

41.2% Standard error 4.60 points

DAMAGE CALC

0- SpA Tangrowth Energy Ball vs. 252 HP / 252+ SpD Swampert-Mega: 256-304 (63.3 - 75.2%) -- guaranteed 2HKO

View Tangrowth counters →

Latias-Mega

DragonPsychic SOFT CHECK View matchup

55.812

19.7

46.4% Standard error 6.67 points

DAMAGE CALC

252+ SpA Latias-Mega Draco Meteor vs. 252 HP / 252+ SpD Swampert-Mega: 166-196 (41 - 48.5%) -- guaranteed 3HKO

View Latias-Mega counters →

Alakazam-Mega

Psychic SOFT CHECK View matchup

48.037

18.5

47.4% Standard error 7.20 points

DAMAGE CALC

252+ SpA Alakazam-Mega Psychic vs. 252 HP / 252+ SpD Swampert-Mega: 136-162 (33.6 - 40%) -- guaranteed 3HKO

View Alakazam-Mega counters →

Kyurem-Black

DragonIce OFFENSIVE CHECK View matchup

20.801

16.0

59.1% Standard error 10.78 points

DAMAGE CALC

252+ Atk Kyurem-Black Freeze Shock vs. 252 HP / 0 Def Swampert-Mega: 283-334 (70 - 82.6%) -- guaranteed 2HKO

View Kyurem-Black counters → Teams with Kyurem-Black →

Slowbro

WaterPsychic SOFT CHECK View matchup

28.323

15.9

53.4% Standard error 9.37 points

DAMAGE CALC

252+ SpA Slowbro Future Sight vs. 252 HP / 252+ SpD Swampert-Mega: 121-144 (29.9 - 35.6%) -- 31.7% chance to 3HKO

View Slowbro counters → Teams with Slowbro →

Tapu Fini

WaterFairy SOFT CHECK View matchup

122.063

14.5

31.3% Standard error 4.20 points

DAMAGE CALCMisty Terrain

Tapu Fini Nature's Madness vs. 252 HP Swampert-Mega: 202-202 (50 - 50%) -- guaranteed 2HKO

View Tapu Fini counters → Teams with Tapu Fini →

Scizor-Mega

BugSteel SOFT CHECK View matchup

22.532

10.8

52.9% Standard error 10.52 points

DAMAGE CALC

252+ Atk Scizor-Mega Superpower vs. 252 HP / 0 Def Swampert-Mega: 147-174 (36.3 - 43%) -- guaranteed 3HKO

View Scizor-Mega counters → Teams with Scizor-Mega →

Pelipper

WaterFlying SOFT CHECK View matchup

20.121

9.2

53.7% Standard error 11.12 points

DAMAGE CALCRain

0- SpA Pelipper Surf vs. 252 HP / 252+ SpD Swampert-Mega in Rain: 84-100 (20.7 - 24.7%) -- guaranteed 5HKO

View Pelipper counters → Teams with Pelipper →

Clefable

Fairy SOFT CHECK View matchup

64.12

9.0

32.4% Standard error 5.84 points

DAMAGE CALC

252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Swampert-Mega: 93-111 (23 - 27.4%) -- 62.7% chance to 4HKO

View Clefable counters → Teams with Clefable →

Magearna

SteelFairy SOFT CHECK View matchup

260.803

8.2

17.6% Standard error 2.36 points

DAMAGE CALC

252+ SpA Magearna Fleur Cannon vs. 252 HP / 252+ SpD Swampert-Mega: 157-186 (38.8 - 46%) -- guaranteed 3HKO

View Magearna counters → Teams with Magearna →

Landorus-Therian

GroundFlying SOFT CHECK View matchup

372.034

6.0

13.0% Standard error 1.74 points

DAMAGE CALC

252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Swampert-Mega: 299-352 (74 - 87.1%) -- guaranteed 2HKO

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

Tornadus-Therian

Flying SOFT CHECK View matchup

100.349

5.9

22.6% Standard error 4.18 points

DAMAGE CALC

252+ SpA Tornadus-Therian Hurricane vs. 252 HP / 252+ SpD Swampert-Mega: 118-141 (29.2 - 34.9%) -- 11.1% chance to 3HKO

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

Tapu Koko

ElectricFairy SOFT CHECK View matchup

154.556

5.9

18.4% Standard error 3.11 points

DAMAGE CALCElectric Terrain

Tapu Koko Nature's Madness vs. 252 HP Swampert-Mega: 202-202 (50 - 50%) -- guaranteed 2HKO

View Tapu Koko counters → Teams with Tapu Koko →

Zapdos

ElectricFlying SOFT CHECK View matchup

52.925

-0.6

22.3% Standard error 5.72 points

DAMAGE CALC

252+ SpA Zapdos Hidden Power Ice vs. 252 HP / 252+ SpD Swampert-Mega: 48-57 (11.8 - 14.1%) -- possible 8HKO

View Zapdos counters → Teams with Zapdos →

Toxapex

PoisonWater SOFT CHECK View matchup

146.228

-1.0

7.9% Standard error 2.23 points

DAMAGE CALC

252+ SpA Toxapex Scald vs. 252 HP / 252+ SpD Swampert-Mega: 57-67 (14.1 - 16.5%) -- possible 7HKO

View Toxapex counters → Teams with Toxapex →

Celesteela

SteelFlying SOFT CHECK View matchup

20.582

-1.4

42.1% Standard error 10.88 points

DAMAGE CALC

252+ Atk Celesteela Explosion vs. 252 HP / 0 Def Swampert-Mega: 232-273 (57.4 - 67.5%) -- guaranteed 2HKO

View Celesteela counters → Teams with Celesteela →

Heatran

FireSteel SOFT CHECK View matchup

119.495

-2.9

5.2% Standard error 2.04 points

DAMAGE CALC

252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Swampert-Mega: 73-87 (18 - 21.5%) -- possible 5HKO

View Heatran counters → Teams with Heatran →

Tapu Lele

PsychicFairy SOFT CHECK View matchup

40.301

-4.9

20.6% Standard error 6.37 points

DAMAGE CALCPsychic Terrain

252+ SpA Choice Specs Tapu Lele Psyshock vs. 252 HP / 0 Def Swampert-Mega in Psychic Terrain: 297-351 (73.5 - 86.8%) -- guaranteed 2HKO

View Tapu Lele counters → Teams with Tapu Lele →

Mawile-Mega

SteelFairy SOFT CHECK View matchup

22.699

-6.7

32.7% Standard error 9.85 points

DAMAGE CALC

252+ Atk Huge Power Mawile-Mega Focus Punch vs. 252 HP / 0 Def Swampert-Mega: 284-335 (70.2 - 82.9%) -- guaranteed 2HKO

View Mawile-Mega counters →

Gliscor

GroundFlying SOFT CHECK View matchup

48.768

-7.2

10.0% Standard error 4.29 points

DAMAGE CALC

252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Swampert-Mega: 135-159 (33.4 - 39.3%) -- guaranteed 3HKO

View Gliscor counters → Teams with Gliscor →

Tapu Bulu

GrassFairy SOFT CHECK View matchup

20.096

-7.5

35.1% Standard error 10.64 points

DAMAGE CALCGrassy Terrain

252+ Atk Tapu Bulu Wood Hammer vs. 252 HP / 0 Def Swampert-Mega in Grassy Terrain: 1188-1404 (294 - 347.5%) -- guaranteed OHKO

View Tapu Bulu counters → Teams with Tapu Bulu →

Chansey

Normal SOFT CHECK View matchup

31.347

-11.4

10.9% Standard error 5.57 points

DAMAGE CALC

Chansey Seismic Toss vs. 252 HP Swampert-Mega: 100-100 (24.7 - 24.7%) -- guaranteed 5HKO

View Chansey counters → Teams with Chansey →

Tyranitar-Mega

RockDark SOFT CHECK View matchup

20.393

-16.7

14.0% Standard error 7.68 points

DAMAGE CALCSand

252+ Atk Tyranitar-Mega Crunch vs. 252 HP / 0 Def Swampert-Mega: 159-187 (39.3 - 46.2%) -- guaranteed 3HKO

View Tyranitar-Mega counters →

Ranked #12 with 12.71% usage. Sorted by conservative score.