Is Mewtwo viable in Gen 9 National Dex Ubers?

Mewtwo is ranked #28 in Gen 9 National Dex Ubers with 5.07% usage according to Smogon May 2026 - Jul 2026 data.

What beats Mewtwo in Gen 9 National Dex Ubers?

Zacian-Crowned has the strongest conservative score in this observed May 2026 - Jul 2026 sample. The target was knocked out or switched out in 65.2% of 93.83721497062768 relevant encounters. Standard error is 8.3 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 · Sorted by p − 4 standard errors · Smogon source period May 2026 - Jul 2026 · Generated 2026-08-05

#0150 Mewtwo

Psychic

USAGE 5.1% #28

ABILITYPressure

BASE STATS

HP 106

ATK 110

DEF 90

SPA 154

SPD 90

SPE 130

BST680

TYPE MATCHUPS

2×

BugGhostDark

½×

FightingPsychic

Moves

Psystrike 97.2% Nasty Plot 60.5% Earth Power 45.1% Taunt 37.1% Recover 33.2% Will-O-Wisp 33.0% Tera Blast 32.8% Ice Beam 19.5%

Items

Rocky Helmet 32.7% Life Orb 32.1% Heavy-Duty Boots 20.1% Leftovers 4.7% Choice Specs 4.3% Kasib Berry 2.6% Focus Sash 1.2% Choice Scarf 0.5%

Abilities

Pressure96.7%Unnerve3.3%

Tera Types

Steel 37.0% Fairy 35.7% Electric 9.2% Fighting 5.8% Dark 4.1% Grass 2.1% Psychic 1.9% Ice 1.1%

Common Teammates

Yveltal44.6%

Necrozma-Dusk-Mane36.7%

Slurpuff34.6%

Ogerpon-Hearthflame34.1%

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 44.6% 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

93.837

31.9

65.2% Standard error 8.33 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

106.203

9.1

41.6% Standard error 8.13 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

101.379

6.9

40.0% Standard error 8.28 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 →

Marshadow

FightingGhost SOFT CHECK View matchup

27.552

-2.0

34.2% Standard error 9.04 points

DAMAGE CALC

252+ Atk Marshadow Poltergeist vs. 252 HP / 0 Def Mewtwo: 420-494 (100.9 - 118.7%) -- guaranteed OHKO

View Marshadow counters → Teams with Marshadow →

Arceus-Dark

Dark SOFT CHECK View matchup

25.856

-2.8

34.7% Standard error 9.36 points

DAMAGE CALC

252+ SpA Dread Plate Arceus-Dark Judgment vs. 252 HP / 252+ SpD Mewtwo: 314-372 (75.4 - 89.4%) -- guaranteed 2HKO

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

Necrozma-Dusk-Mane

PsychicSteel SOFT CHECK View matchup

45.829

-3.9

36.0% Standard error 9.99 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 →

Zygarde

DragonGround SOFT CHECK View matchup

92.625

-5.5

25.6% Standard error 7.79 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 →

Ho-Oh

FireFlying SOFT CHECK View matchup

114.128

-8.7

12.6% Standard error 5.32 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 →

Ranked #28 with 5.07% usage. Sorted by conservative score.