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

Mewtwo-Mega-Y is ranked #32 in Gen 9 National Dex Ubers with 4.09% usage according to Smogon Apr 2026 - Jun 2026 data.

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

The best counter for Mewtwo-Mega-Y in Gen 9 National Dex Ubers is Marshadow with a 83.7% win rate when they meet. Based on Smogon's Apr 2026 - Jun 2026 usage data, the top Pokémon that beat Mewtwo-Mega-Y include Marshadow, Zacian-Crowned, Yveltal, Necrozma-Dusk-Mane, Groudon-Primal.

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

Marshadow is the best counter for Mewtwo-Mega-Y in Gen 9 National Dex Ubers, KOing or forcing it out in 83.7% of their encounters.

Mewtwo-Mega-Y counters

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

#0150 Mewtwo-Mega-Y

Psychic

USAGE 4.1% #32

BASE STATS

HP 106

ATK 150

DEF 70

SPA 194

SPD 120

SPE 140

BST780

TYPE MATCHUPS

2×

BugGhostDark

½×

FightingPsychic

Moves

Psystrike 95.4% Nasty Plot 65.8% Ice Beam 57.3% Fire Blast 29.5% Earth Power 29.4% Thunderbolt 22.4% Aura Sphere 19.2% Focus Blast 17.9%

Items

Mewtwonite Y 100.0%

Common Teammates

Necrozma-Dusk-Mane25.0%

Arceus-Fairy25.0%

Lunala18.5%

Rayquaza18.2%

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

23.97

83.7% dies 7.55%

DAMAGE CALC

252+ Atk Marshadow Poltergeist vs. 252 HP / 0 Def Mewtwo-Mega-Y: 516-608 (124 - 146.1%) -- guaranteed OHKO

View Marshadow counters → Teams with Marshadow →

Zacian-Crowned

FairySteel OFFENSIVE CHECK

43.637

67.7% dies 9.85%

DAMAGE CALC

+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 0 Def Mewtwo-Mega-Y: 361-426 (86.7 - 102.4%) -- 18.8% chance to OHKO

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

Yveltal

DarkFlying OFFENSIVE CHECK

81.851

65.4% dies 9.00%

DAMAGE CALC

0- Atk Life Orb Dark Aura Yveltal Foul Play vs. 252 HP / 0 Def Mewtwo-Mega-Y: 603-712 (144.9 - 171.1%) -- guaranteed OHKO

View Yveltal counters → Teams with Yveltal →

Necrozma-Dusk-Mane

PsychicSteel OFFENSIVE CHECK

21.528

56.6% dies 10.68%

DAMAGE CALC

0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Mewtwo-Mega-Y: 193-228 (46.3 - 54.8%) -- 59% chance to 2HKO

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

Groudon-Primal

GroundFire SOFT CHECK

44.186

42.1% dies 10.46%

DAMAGE CALCHarsh Sunshine

252+ Atk Groudon-Primal Heat Crash (120 BP) vs. 252 HP / 0 Def Mewtwo-Mega-Y in Harsh Sunshine: 553-652 (132.9 - 156.7%) -- guaranteed OHKO

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

Ho-Oh

FireFlying SOFT CHECK

61.027

32.5% dies 8.46%

DAMAGE CALC

252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Mewtwo-Mega-Y: 288-340 (69.2 - 81.7%) -- guaranteed 2HKO

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

Eternatus

PoisonDragon SOFT CHECK

51.035

14.5% dies 6.92%

DAMAGE CALC

252+ SpA Eternatus Draco Meteor vs. 252 HP / 252+ SpD Mewtwo-Mega-Y: 160-190 (38.4 - 45.6%) -- guaranteed 3HKO

View Eternatus counters → Teams with Eternatus →

Ranked #32 with 4.09% usage. Sorted by reliability score.