Is Mewtwo-Mega-X viable in Gen 9 National Dex Ubers?

Mewtwo-Mega-X is ranked #23 in Gen 9 National Dex Ubers with 5.36% usage according to Smogon Apr 2026 - Jun 2026 data.

What beats Mewtwo-Mega-X in Gen 9 National Dex Ubers?

The best counter for Mewtwo-Mega-X in Gen 9 National Dex Ubers is Marshadow with a 79.3% win rate when they meet. Based on Smogon's Apr 2026 - Jun 2026 usage data, the top Pokémon that beat Mewtwo-Mega-X include Marshadow, Zacian-Crowned, Groudon-Primal, Necrozma-Dusk-Mane, Giratina-Origin.

What is the best counter for Mewtwo-Mega-X in Gen 9 National Dex Ubers?

Marshadow is the best counter for Mewtwo-Mega-X in Gen 9 National Dex Ubers, KOing or forcing it out in 79.3% of their encounters.

Mewtwo-Mega-X counters

Gen 9 National Dex Ubers · Sorted by reliability score · Smogon · Apr 2026 - Jun 2026

#0150 Mewtwo-Mega-X

PsychicFighting

USAGE 5.4% #23

BASE STATS

HP 106

ATK 190

DEF 100

SPA 154

SPD 100

SPE 130

BST780

TYPE MATCHUPS

2×

FlyingGhostFairy

½×

FightingRock

Moves

Low Kick 92.9% Stone Edge 83.8% Ice Beam 82.5% Electro Ball 56.5% Taunt 22.3% Zen Headbutt 11.5% Bulk Up 11.4% Drain Punch 7.2%

Items

Mewtwonite X 100.0%

Common Teammates

Checks & Counters

Ranked by reliability — blends KO rate with how often each Pokémon is matched up.

# Checker Encounters Reliability KO Rate

Marshadow

FightingGhost OFFENSIVE CHECK

97.578

79.3% dies 7.04%

DAMAGE CALC

252+ Atk Marshadow Poltergeist vs. 252 HP / 0 Def Mewtwo-Mega-X: 384-452 (92.3 - 108.6%) -- 50% chance to OHKO

View Marshadow counters → Teams with Marshadow →

Zacian-Crowned

FairySteel OFFENSIVE CHECK

162.007

75.4% dies 5.68%

DAMAGE CALC

+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 0 Def Mewtwo-Mega-X: 540-636 (129.8 - 152.8%) -- guaranteed OHKO

View Zacian-Crowned counters → Teams with Zacian-Crowned →

Groudon-Primal

GroundFire OFFENSIVE CHECK

152.724

56.3% dies 6.88%

DAMAGE CALCHarsh Sunshine

252+ Atk Groudon-Primal Heat Crash (120 BP) vs. 252 HP / 0 Def Mewtwo-Mega-X in Harsh Sunshine: 414-487 (99.5 - 117%) -- 93.8% chance to OHKO

View Groudon-Primal counters → Teams with Groudon-Primal →

Necrozma-Dusk-Mane

PsychicSteel SOFT CHECK

74.199

42.4% dies 9.92%

DAMAGE CALC

0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Mewtwo-Mega-X: 144-171 (34.6 - 41.1%) -- guaranteed 3HKO

View Necrozma-Dusk-Mane counters → Teams with Necrozma-Dusk-Mane →

Giratina-Origin

GhostDragon SOFT CHECK

29.025

42.0% dies 9.16%

DAMAGE CALC

0- Atk Griseous Core Giratina-Origin Poltergeist vs. 252 HP / 0 Def Mewtwo-Mega-X: 300-354 (72.1 - 85%) -- guaranteed 2HKO

View Giratina-Origin counters → Teams with Giratina-Origin →

Eternatus

PoisonDragon SOFT CHECK

47.625

35.4% dies 9.78%

DAMAGE CALC

252+ SpA Eternatus Draco Meteor vs. 252 HP / 252+ SpD Mewtwo-Mega-X: 183-216 (43.9 - 51.9%) -- 10.9% chance to 2HKO

View Eternatus counters → Teams with Eternatus →

Zygarde

DragonGround SOFT CHECK

121.881

34.4% dies 7.42%

DAMAGE CALC

252+ Atk Zygarde Outrage vs. 252 HP / 0 Def Mewtwo-Mega-X: 180-213 (43.2 - 51.2%) -- 5.1% chance to 2HKO

View Zygarde counters → Teams with Zygarde →

Yveltal

DarkFlying SOFT CHECK

152.35

33.9% dies 6.58%

DAMAGE CALC

0- Atk Life Orb Dark Aura Yveltal Foul Play vs. 252 HP / 0 Def Mewtwo-Mega-X: 278-329 (66.8 - 79%) -- guaranteed 2HKO

View Yveltal counters → Teams with Yveltal →

Kyogre-Primal

Water SOFT CHECK

70.215

24.7% dies 8.86%

DAMAGE CALCHeavy Rain

252+ SpA Kyogre-Primal Water Spout (150 BP) vs. 252 HP / 252+ SpD Mewtwo-Mega-X in Heavy Rain: 372-438 (89.4 - 105.2%) -- 31.3% chance to OHKO

View Kyogre-Primal counters → Teams with Kyogre-Primal →

Arceus-Ground

Ground SOFT CHECK

62.041

19.6% dies 7.08%

DAMAGE CALC

252+ SpA Earth Plate Arceus-Ground Judgment vs. 252 HP / 252+ SpD Mewtwo-Mega-X: 147-174 (35.3 - 41.8%) -- guaranteed 3HKO

View Arceus-Ground counters → Teams with Arceus-Ground →

Ho-Oh

FireFlying SOFT CHECK

134.305

19.0% dies 5.82%

DAMAGE CALC

252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Mewtwo-Mega-X: 432-510 (103.8 - 122.5%) -- guaranteed OHKO

View Ho-Oh counters → Teams with Ho-Oh →

Arceus-Dark

Dark SOFT CHECK

21.486

5.4% dies 4.88%

DAMAGE CALC

0- Atk Dread Plate Arceus-Dark Foul Play vs. 252 HP / 0 Def Mewtwo-Mega-X: 195-229 (46.8 - 55%) -- 67.2% chance to 2HKO

View Arceus-Dark counters → Teams with Arceus-Dark →

Ranked #23 with 5.36% usage. Sorted by reliability score.