Is Mewtwo-Mega-X viable in Gen 6 Pure Hackmons?

Mewtwo-Mega-X is ranked #1 in Gen 6 Pure Hackmons with 56.09% usage according to Smogon Jul 2026 - Sep 2026 data.

What beats Mewtwo-Mega-X in Gen 6 Pure Hackmons?

Mewtwo-Mega-X has the strongest conservative score in this observed Jul 2026 - Sep 2026 sample. The target was knocked out or switched out in 47.7% of 113.88273801432507 relevant encounters. Standard error is 4.7 points. Sets and switch conditions can change the result.

How are Mewtwo-Mega-X matchup checks ranked in Gen 6 Pure Hackmons?

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

Mewtwo-Mega-X counters

Gen 6 Pure Hackmons · Smogon source period Jul 2026 - Sep 2026

#0150 Mewtwo-Mega-X

PsychicFighting

USAGE 56.1% #1

ABILITYHuge Power

BASE STATS

HP 106

ATK 190

DEF 100

SPA 154

SPD 100

SPE 130

BST780

TYPE MATCHUPS

2×

FlyingGhostFairy

½×

FightingRock

Moves

Thousand Arrows 36.8% Shadow Sneak 31.6% Extreme Speed 27.9% Close Combat 26.6% Play Rough 19.3% Bonemerang 17.6% Low Kick 16.4% Ice Shard 16.2%

Items

Expert Belt 20.6% Scope Lens 15.6% Lum Berry 11.5% Life Orb 10.9% Leftovers 9.7% Mewtwonite X 6.6% Shed Shell 6.1% Choice Scarf 5.3%

Abilities

Huge Power23.4%Mold Breaker17.3%Wonder Guard16.2%Shadow Tag15.2%Illusion10.5%Pure Power5.4%Pixilate4.1%Turboblaze4.0%

Common Teammates

Leading observed checks

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

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

Mewtwo-Mega-X

PsychicFighting SOFT CHECK View matchup

113.883

29.0

47.7% Standard error 4.68 points

DAMAGE CALC

252+ Atk Expert Belt Huge Power Mewtwo-Mega-X Play Rough vs. 252 HP / 0 Def Mewtwo-Mega-X: 689-811 (165.6 - 194.9%) -- guaranteed OHKO

View Mewtwo-Mega-X counters →

Groudon-Primal

GroundFire SOFT CHECK View matchup

121.976

18.6

36.0% Standard error 4.35 points

DAMAGE CALC

252+ Atk Groudon-Primal V-create vs. 252 HP / 0 Def Mewtwo-Mega-X: 412-486 (99 - 116.8%) -- 93.8% chance to OHKO

View Groudon-Primal counters →

Rayquaza-Mega

DragonFlying SOFT CHECK View matchup

66.095

18.1

42.4% Standard error 6.08 points

DAMAGE CALC

252+ SpA Rayquaza-Mega Oblivion Wing vs. 252 HP / 252+ SpD Mewtwo-Mega-X: 266-314 (63.9 - 75.4%) -- guaranteed 2HKO

View Rayquaza-Mega counters →

Xerneas

Fairy SOFT CHECK View matchup

48.388

16.8

45.4% Standard error 7.16 points

DAMAGE CALC

252+ SpA Xerneas Moonblast vs. 252 HP / 252+ SpD Mewtwo-Mega-X: 248-294 (59.6 - 70.6%) -- guaranteed 2HKO

View Xerneas counters →

Chansey

Normal SOFT CHECK View matchup

25.252

15.2

54.8% Standard error 9.90 points

DAMAGE CALC

252+ SpA Chansey Chatter vs. 252 HP / 252+ SpD Mewtwo-Mega-X: 54-64 (12.9 - 15.3%) -- possible 7HKO

View Chansey counters →

Giratina

GhostDragon SOFT CHECK View matchup

117.674

14.4

31.6% Standard error 4.28 points

Kyogre-Primal

Water SOFT CHECK View matchup

92.161

10.6

29.6% Standard error 4.75 points

DAMAGE CALC

252+ SpA Kyogre-Primal Steam Eruption vs. 252 HP / 252+ SpD Mewtwo-Mega-X: 181-214 (43.5 - 51.4%) -- 8.2% chance to 2HKO

View Kyogre-Primal counters →

Blissey

Normal SOFT CHECK View matchup

61.188

10.1

34.4% Standard error 6.07 points

DAMAGE CALC

252+ SpA Blissey Chatter vs. 252 HP / 252+ SpD Mewtwo-Mega-X: 78-94 (18.7 - 22.5%) -- possible 5HKO

View Blissey counters →

Gengar-Mega

GhostPoison SOFT CHECK View matchup

43.843

8.3

37.5% Standard error 7.31 points

DAMAGE CALC

252+ SpA Spooky Plate Gengar-Mega Judgment vs. 252 HP / 252+ SpD Mewtwo-Mega-X: 380-450 (91.3 - 108.1%) -- 50% chance to OHKO

View Gengar-Mega counters →

Deoxys-Speed

Psychic SOFT CHECK View matchup

49.36

6.3

33.0% Standard error 6.69 points

Beedrill-Mega

BugPoison SOFT CHECK View matchup

21.175

4.3

47.7% Standard error 10.85 points

DAMAGE CALC

252+ Atk Beedrill-Mega Poison Jab vs. 252 HP / 0 Def Mewtwo-Mega-X: 160-189 (38.4 - 45.4%) -- guaranteed 3HKO

View Beedrill-Mega counters →

Gyarados-Mega

WaterDark SOFT CHECK View matchup

45.655

1.4

28.0% Standard error 6.65 points

DAMAGE CALC

0- Atk Huge Power Gyarados-Mega Knock Off (97.5 BP) vs. 252 HP / 0 Def Mewtwo-Mega-X: 274-324 (65.8 - 77.8%) -- guaranteed 2HKO

View Gyarados-Mega counters →

Slaking

Normal SOFT CHECK View matchup

57.895

-0.5

20.8% Standard error 5.33 points

DAMAGE CALC

252+ Atk Slaking Extreme Speed vs. 252 HP / 0 Def Mewtwo-Mega-X: 168-198 (40.3 - 47.5%) -- guaranteed 3HKO

View Slaking counters →

Sceptile-Mega

GrassDragon SOFT CHECK View matchup

43.717

-2.5

22.9% Standard error 6.35 points

DAMAGE CALC

0- Atk Sceptile-Mega Shadow Sneak vs. 252 HP / 0 Def Mewtwo-Mega-X: 56-68 (13.4 - 16.3%) -- possible 7HKO

View Sceptile-Mega counters →

Mewtwo-Mega-Y

Psychic SOFT CHECK View matchup

24.071

-5.2

33.2% Standard error 9.60 points

DAMAGE CALC

252+ SpA Mewtwo-Mega-Y Psystrike vs. 252 HP / 0 Def Mewtwo-Mega-X: 244-288 (58.6 - 69.2%) -- guaranteed 2HKO

View Mewtwo-Mega-Y counters →

Ranked #1 with 56.09% usage. Sorted by conservative score.