Is Diancie-Mega viable in Gen 9 Balanced Hackmons?

Diancie-Mega is ranked #7 in Gen 9 Balanced Hackmons with 22.21% usage according to Smogon Jul 2026 - Sep 2026 data.

What beats Diancie-Mega in Gen 9 Balanced Hackmons?

Groudon-Primal has the strongest conservative score in this observed Jul 2026 - Sep 2026 sample. The target was knocked out or switched out in 54.7% of 72.87503726918874 relevant encounters. Standard error is 5.8 points. Sets and switch conditions can change the result.

How are Diancie-Mega matchup checks ranked in Gen 9 Balanced Hackmons?

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

Diancie-Mega counters

Gen 9 Balanced Hackmons · Smogon source period Jul 2026 - Sep 2026

#0719 Diancie-Mega

RockFairy

USAGE 22.2% #7

ABILITYPixilate

BASE STATS

HP 50

ATK 160

DEF 110

SPA 160

SPD 110

SPE 110

BST700

TYPE MATCHUPS

4×

Steel

2×

WaterGrassGround

½×

NormalFireFlyingBugDark

0×

Dragon

Moves

Boomburst 81.8% Extreme Speed 81.6% Stone Axe 23.2% Steam Eruption 23.1% Pyro Ball 18.2% Explosion 12.5% Flip Turn 12.2% Moonblast 12.0%

Items

Pixie Plate 37.0% Life Orb 18.2% Choice Specs 10.4% Focus Sash 7.5% Fairy Feather 7.4% Throat Spray 6.8% Wide Lens 3.2% Choice Band 2.2%

Abilities

Pixilate85.9%Unburden6.8%Sheer Force5.5%Rocky Payload0.4%Magic Guard0.4%Magic Bounce0.3%Prankster0.2%Serene Grace0.2%

Common Teammates

Leading observed checks

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

Team core to explore

Diancie-Mega + Arceus-Ghost 57.4% 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

Groudon-Primal

GroundFire SOFT CHECK View matchup

72.875

31.3

54.7% Standard error 5.83 points

DAMAGE CALC

252+ Atk Groudon-Primal Headlong Rush vs. 252 HP / 0 Def Diancie-Mega: 510-600 (167.7 - 197.3%) -- guaranteed OHKO

View Groudon-Primal counters →

Chansey

Normal SOFT CHECK View matchup

43.486

24.4

54.6% Standard error 7.55 points

DAMAGE CALC

252+ Atk Chansey Salt Cure vs. 252 HP / 0 Def Diancie-Mega: 14-17 (4.6 - 5.5%)

View Chansey counters → Teams with Chansey →

Registeel

Steel SOFT CHECK View matchup

33.366

18.9

53.4% Standard error 8.64 points

DAMAGE CALC

0- SpA Registeel Revelation Dance vs. 252 HP / 252+ SpD Diancie-Mega: 192-228 (63.1 - 75%) -- guaranteed 2HKO

View Registeel counters → Teams with Registeel →

Arceus-Ghost

Ghost SOFT CHECK View matchup

22.255

8.0

50.4% Standard error 10.60 points

DAMAGE CALC

252+ SpA Spooky Plate Arceus-Ghost Judgment vs. 252 HP / 252+ SpD Diancie-Mega: 138-163 (45.3 - 53.6%) -- 40.2% chance to 2HKO

View Arceus-Ghost counters → Teams with Arceus-Ghost →

Eternatus

PoisonDragon SOFT CHECK View matchup

20.24

-7.1

35.4% Standard error 10.63 points

DAMAGE CALC

Eternatus Final Gambit vs. 252 HP Diancie-Mega: 421-421 (138.4 - 138.4%) -- guaranteed OHKO

View Eternatus counters → Teams with Eternatus →

Ranked #7 with 22.21% usage. Sorted by conservative score.