Is Mewtwo viable in Gen 9 National Dex Ubers?

Mewtwo is ranked #29 in Gen 9 National Dex Ubers with 4.98% usage according to Smogon Jul 2026 - Sep 2026 data.

What beats Mewtwo in Gen 9 National Dex Ubers?

Zacian-Crowned has the strongest conservative score in this observed Jul 2026 - Sep 2026 sample. The target was knocked out or switched out in 57.8% of 76.08815175138096 relevant encounters. Standard error is 5.7 points. Sets and switch conditions can change the result.

How are Mewtwo matchup checks ranked in Gen 9 National Dex Ubers?

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

Mewtwo counters

Gen 9 National Dex Ubers · Smogon source period Jul 2026 - Sep 2026

#0150 Mewtwo

Psychic

USAGE 5.0% #29

ABILITYPressure

BASE STATS

HP 106

ATK 110

DEF 90

SPA 154

SPD 90

SPE 130

BST680

TYPE MATCHUPS

2×

BugGhostDark

½×

FightingPsychic

Moves

Psystrike 97.5% Nasty Plot 66.4% Earth Power 56.4% Tera Blast 47.5% Taunt 26.4% Recover 26.3% Will-O-Wisp 26.0% Ice Beam 16.7%

Items

Life Orb 36.4% Rocky Helmet 25.8% Heavy-Duty Boots 24.5% Choice Specs 5.2% Leftovers 2.7% Choice Scarf 1.3% Kasib Berry 0.9% Psychium Z 0.9%

Abilities

Pressure97.1%Unnerve2.9%

Tera Types

Fairy 48.0% Steel 27.0% Electric 7.1% Fighting 3.7% Ice 3.1% Fire 3.1% Psychic 2.9%

Common Teammates

Yveltal43.7%

Arceus-Ground41.4%

Necrozma-Dusk-Mane39.4%

Ogerpon-Hearthflame23.3%

Leading observed checks

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

Team core to explore

Mewtwo + Yveltal 43.7% 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

Zacian-Crowned

FairySteel OFFENSIVE CHECK View matchup

76.088

35.1

57.8% Standard error 5.66 points

DAMAGE CALC

+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 0 Def Mewtwo: 294-346 (70.6 - 83.1%) -- guaranteed 2HKO

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

Yveltal

DarkFlying SOFT CHECK View matchup

106.52

24.3

43.5% Standard error 4.80 points

DAMAGE CALC

0- Atk Life Orb Dark Aura Yveltal Knock Off (97.5 BP) vs. 252 HP / 0 Def Mewtwo: 452-533 (108.6 - 128.1%) -- guaranteed OHKO

View Yveltal counters → Teams with Yveltal →

Groudon-Primal

GroundFire SOFT CHECK View matchup

96.435

21.1

41.2% Standard error 5.01 points

DAMAGE CALCHarsh Sunshine

252+ Atk Groudon-Primal Heat Crash (120 BP) vs. 252 HP / 0 Def Mewtwo in Harsh Sunshine: 451-532 (108.4 - 127.8%) -- guaranteed OHKO

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

Necrozma-Dusk-Mane

PsychicSteel SOFT CHECK View matchup

41.59

7.1

37.1% Standard error 7.49 points

DAMAGE CALC

0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Mewtwo: 157-186 (37.7 - 44.7%) -- guaranteed 3HKO

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

Ho-Oh

FireFlying SOFT CHECK View matchup

131.387

2.3

14.6% Standard error 3.08 points

DAMAGE CALC

252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Mewtwo: 235-277 (56.4 - 66.5%) -- guaranteed 2HKO

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

Zygarde

DragonGround SOFT CHECK View matchup

48.149

1.3

26.9% Standard error 6.39 points

DAMAGE CALC

252+ Atk Zygarde Thousand Arrows vs. 252 HP / 0 Def Mewtwo: 147-174 (35.3 - 41.8%) -- guaranteed 3HKO

View Zygarde counters → Teams with Zygarde →

Eternatus

PoisonDragon SOFT CHECK View matchup

22.381

-11.2

25.8% Standard error 9.25 points

DAMAGE CALC

252+ SpA Eternatus Draco Meteor vs. 252 HP / 252+ SpD Mewtwo: 195-231 (46.8 - 55.5%) -- 72.7% chance to 2HKO

View Eternatus counters → Teams with Eternatus →

Ranked #29 with 4.98% usage. Sorted by conservative score.