Is Mewtwo-Mega-X viable in Gen 9 Pure Hackmons?

Mewtwo-Mega-X is ranked #2 in Gen 9 Pure Hackmons with 41.15% usage according to Smogon Aug 2026 - Sep 2026 data.

What beats Mewtwo-Mega-X in Gen 9 Pure Hackmons?

Calyrex-Shadow has the strongest conservative score in this observed Aug 2026 - Sep 2026 sample. The target was knocked out or switched out in 51.6% of 92.54957542006805 relevant encounters. Standard error is 5.2 points. Sets and switch conditions can change the result.

How are Mewtwo-Mega-X matchup checks ranked in Gen 9 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 9 Pure Hackmons · Smogon source period Aug 2026 - Sep 2026

#0150 Mewtwo-Mega-X

PsychicFighting

USAGE 41.2% #2

ABILITYHuge Power

BASE STATS

HP 106

ATK 190

DEF 100

SPA 154

SPD 100

SPE 130

BST780

TYPE MATCHUPS

2×

FlyingGhostFairy

½×

FightingRock

Moves

Photon Geyser 68.6% Jet Punch 30.2% Corrosive Gas 30.0% Sunsteel Strike 22.1% Mach Punch 20.8% Magic Room 16.7% Flower Trick 16.3% Shadow Sneak 15.8%

Items

Ability Shield 79.6% Choice Scarf 4.9% Safety Goggles 2.5% Heavy-Duty Boots 2.4% Choice Band 2.3% Focus Sash 1.9% Leftovers 1.5% Life Orb 0.9%

Abilities

Huge Power71.1%Pure Power8.1%Neutralizing Gas7.2%Wonder Guard7.0%Magic Bounce1.9%Shadow Tag1.1%Mold Breaker0.6%Parental Bond0.5%

Tera Types

Water 17.6% Normal 16.0% Grass 14.1% Psychic 13.9% Dark 12.0% Ghost 11.3% Fighting 5.3% Ice 3.4%

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

Calyrex-Shadow

PsychicGhost SOFT CHECK View matchup

92.55

30.8

51.6% Standard error 5.19 points

DAMAGE CALC

252+ SpA Calyrex-Shadow Moongeist Beam vs. 252 HP / 252+ SpD Mewtwo-Mega-X: 308-366 (74 - 87.9%) -- guaranteed 2HKO

View Calyrex-Shadow counters →

Mewtwo-Mega-X

PsychicFighting SOFT CHECK View matchup

61.816

22.5

48.0% Standard error 6.35 points

DAMAGE CALC

0- Atk Huge Power Mewtwo-Mega-X Flower Trick vs. 252 HP / 0 Def Mewtwo-Mega-X on a critical hit: 239-282 (57.4 - 67.7%) -- guaranteed 2HKO

View Mewtwo-Mega-X counters →

Blissey

Normal SOFT CHECK View matchup

88.95

17.4

38.0% Standard error 5.15 points

Regieleki

Electric SOFT CHECK View matchup

120.672

13.2

29.8% Standard error 4.16 points

Groudon-Primal

GroundFire SOFT CHECK View matchup

38.966

9.0

40.5% Standard error 7.86 points

DAMAGE CALC

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

View Groudon-Primal counters →

Kartana

GrassSteel SOFT CHECK View matchup

49.768

8.8

36.0% Standard error 6.80 points

DAMAGE CALC

252+ Atk Kartana Sunsteel Strike vs. 252 HP / 0 Def Mewtwo-Mega-X: 231-273 (55.5 - 65.6%) -- guaranteed 2HKO

View Kartana counters →

Arceus

Normal SOFT CHECK View matchup

84.433

8.4

28.0% Standard error 4.89 points

DAMAGE CALC

252+ SpA Neutralizing Gas Arceus Boomburst vs. 252 HP / 252+ SpD Ability Shield Mewtwo-Mega-X: 171-202 (41.1 - 48.5%) -- guaranteed 3HKO

View Arceus counters →

Sableye-Mega

DarkGhost SOFT CHECK View matchup

32.054

6.4

41.1% Standard error 8.69 points

DAMAGE CALC

0- Atk Sableye-Mega Foul Play vs. 252 HP / 0 Def Mewtwo-Mega-X: 162-192 (38.9 - 46.1%) -- guaranteed 3HKO

View Sableye-Mega counters →

Arceus-Water

Water SOFT CHECK View matchup

78.453

2.7

21.2% Standard error 4.61 points

DAMAGE CALC

252+ Atk Arceus-Water Surging Strikes (3 hits) vs. 252 HP / 0 Def Mewtwo-Mega-X on a critical hit: 198-234 (47.5 - 56.2%) -- 89.8% chance to 2HKO

View Arceus-Water counters →

Aegislash

SteelGhost SOFT CHECK View matchup

48.245

-2.1

21.5% Standard error 5.92 points

Arceus-Dark

Dark SOFT CHECK View matchup

28.222

-10.6

18.7% Standard error 7.34 points

DAMAGE CALC

0- SpA Neutralizing Gas Arceus-Dark Judgment vs. 252 HP / 252+ SpD Ability Shield Mewtwo-Mega-X: 55-65 (13.2 - 15.6%) -- possible 7HKO

View Arceus-Dark counters →

Audino-Mega

NormalFairy SOFT CHECK View matchup

30.881

-11.1

6.1% Standard error 4.30 points

DAMAGE CALC

252+ SpA Audino-Mega Moonblast vs. 252 HP / 252+ SpD Mewtwo-Mega-X: 180-212 (43.2 - 50.9%) -- 4.7% chance to 2HKO

View Audino-Mega counters →

Yveltal

DarkFlying SOFT CHECK View matchup

21.328

-12.6

24.7% Standard error 9.34 points

DAMAGE CALC

252+ Atk Yveltal Ceaseless Edge vs. 252 HP / 0 Def Mewtwo-Mega-X: 118-139 (28.3 - 33.4%) -- 0.1% chance to 3HKO

View Yveltal counters →

Ranked #2 with 41.15% usage. Sorted by conservative score.