Is Diancie-Mega viable in Gen 9 Balanced Hackmons?

Diancie-Mega is ranked #6 in Gen 9 Balanced Hackmons with 24.82% usage according to Smogon May 2026 - Jul 2026 data.

What beats Diancie-Mega in Gen 9 Balanced Hackmons?

Registeel has the strongest conservative score in this observed May 2026 - Jul 2026 sample. The target was knocked out or switched out in 53.4% of 33.366458332268714 relevant encounters. Standard error is 8.6 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 · Sorted by p − 4 standard errors · Smogon source period May 2026 - Jul 2026 · Generated 2026-08-05

#0719 Diancie-Mega

RockFairy

USAGE 24.8% #6

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

Extreme Speed 78.5% Boomburst 73.7% Pyro Ball 16.3% Stone Axe 15.8% Moonblast 15.7% Earth Power 14.0% Headlong Rush 13.7% Blue Flare 13.6%

Items

Pixie Plate 28.4% Life Orb 21.3% Choice Specs 19.1% Throat Spray 8.2% Focus Sash 7.9% Fairy Feather 3.7% Wide Lens 3.3% Stone Plate 1.8%

Abilities

Pixilate79.7%Unburden8.1%Sheer Force7.7%Rocky Payload2.0%Magic Guard1.1%Magic Bounce0.6%Serene Grace0.1%Dancer0.1%

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 51.9% 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

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 →

Groudon-Primal

GroundFire SOFT CHECK View matchup

98.617

17.7

52.4% Standard error 8.66 points

DAMAGE CALC

252+ Atk Groudon-Primal Precipice Blades 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

61.381

16.1

51.6% Standard error 8.87 points

Arceus-Ghost

Ghost SOFT CHECK View matchup

47.732

8.0

48.9% Standard error 10.22 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

252+ SpA Eternatus Malignant Chain vs. 252 HP / 252+ SpD Diancie-Mega: 132-156 (43.4 - 51.3%) -- 4.7% chance to 2HKO

View Eternatus counters → Teams with Eternatus →

Blissey

Normal SOFT CHECK View matchup

22.95

-8.0

30.4% Standard error 9.60 points

DAMAGE CALC

252+ Atk Blissey U-turn vs. 252 HP / 0 Def Diancie-Mega: 13-15 (4.2 - 4.9%)

View Blissey counters → Teams with Blissey →

Ranked #6 with 24.82% usage. Sorted by conservative score.