Is Diancie-Mega viable in Gen 7 OU?

Diancie-Mega is ranked #23 in Gen 7 OU with 8.04% usage according to Smogon Apr 2026 - Jun 2026 data.

What beats Diancie-Mega in Gen 7 OU?

The best counter for Diancie-Mega in Gen 7 OU is Serperior with a 89.9% win rate when they meet. Based on Smogon's Apr 2026 - Jun 2026 usage data, the top Pokémon that beat Diancie-Mega include Serperior, Ferrothorn, Greninja, Excadrill, Chansey.

What is the best counter for Diancie-Mega in Gen 7 OU?

Serperior is the best counter for Diancie-Mega in Gen 7 OU, KOing or forcing it out in 89.9% of their encounters.

Diancie-Mega counters

Gen 7 OU · Sorted by reliability score · Smogon · Apr 2026 - Jun 2026

#0719 Diancie-Mega

RockFairy

USAGE 8.0% #23

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

Stealth Rock 76.1% Moonblast 70.2% Diamond Storm 57.9% Earth Power 51.9% Endeavor 42.6% Substitute 41.9% Protect 22.6% Hidden Power Ice 17.4%

Items

Diancite 100.0%

Common Teammates

Landorus-Therian56.7%

Checks & Counters

Ranked by reliability — blends KO rate with how often each Pokémon is matched up.

# Checker Encounters Reliability KO Rate

Serperior

Grass DEFENSIVE COUNTER

29.784

89.9% dies 5.51%

DAMAGE CALC

0- Atk Diancie-Mega Diamond Storm vs. 252 HP / 0 Def Serperior: 153-180 (43.2 - 50.8%) -- guaranteed 3HKO after Leftovers recovery

View Serperior counters → Teams with Serperior →

Ferrothorn

GrassSteel DEFENSIVE COUNTER

99.074

81.3% dies 6.61%

DAMAGE CALC

252+ SpA Diancie-Mega Earth Power vs. 252 HP / 252+ SpD Ferrothorn: 82-97 (23.2 - 27.5%) -- possible 5HKO

View Ferrothorn counters → Teams with Ferrothorn →

Greninja

WaterDark OFFENSIVE CHECK

153.969

77.7% dies 5.77%

DAMAGE CALC

252+ SpA Choice Specs Greninja Hydro Pump vs. 252 HP / 252+ SpD Diancie-Mega: 338-402 (111.1 - 132.2%) -- guaranteed OHKO

View Greninja counters → Teams with Greninja →

Excadrill

GroundSteel OFFENSIVE CHECK

68.455

74.3% dies 7.31%

DAMAGE CALC

252+ Atk Excadrill Iron Head vs. 252 HP / 0 Def Diancie-Mega: 544-648 (178.9 - 213.1%) -- guaranteed OHKO

View Excadrill counters → Teams with Excadrill →

Chansey

Normal DEFENSIVE COUNTER

28.431

71.5% dies 8.47%

DAMAGE CALC

0- Atk Diancie-Mega Diamond Storm vs. 252 HP / 0 Def Eviolite Chansey: 498-586 (70.7 - 83.2%) -- guaranteed 2HKO

View Chansey counters → Teams with Chansey →

Toxapex

PoisonWater DEFENSIVE COUNTER

106.04

59.5% dies 8.19%

DAMAGE CALC

252+ SpA Diancie-Mega Earth Power vs. 252 HP / 252+ SpD Toxapex: 142-168 (46.7 - 55.2%) -- 11.7% chance to 2HKO after Black Sludge recovery

View Toxapex counters → Teams with Toxapex →

Tapu Koko

ElectricFairy OFFENSIVE CHECK

54.527

58.8% dies 9.39%

DAMAGE CALCElectric Terrain

252+ SpA Life Orb Tapu Koko Thunderbolt vs. 252 HP / 252+ SpD Diancie-Mega in Electric Terrain: 172-203 (56.5 - 66.7%) -- guaranteed 2HKO

View Tapu Koko counters → Teams with Tapu Koko →

Kartana

GrassSteel SOFT CHECK

50.287

54.0% dies 9.60%

DAMAGE CALC

252+ Atk Kartana Smart Strike vs. 252 HP / 0 Def Diancie-Mega: 600-708 (197.3 - 232.8%) -- guaranteed OHKO

View Kartana counters → Teams with Kartana →

Magearna

SteelFairy SOFT CHECK

135.717

52.7% dies 7.40%

DAMAGE CALC

0- Atk Magearna Iron Head vs. 252 HP / 0 Def Diancie-Mega: 276-328 (90.7 - 107.8%) -- 50% chance to OHKO

View Magearna counters → Teams with Magearna →

Landorus-Therian

GroundFlying SOFT CHECK

194.196

52.1% dies 6.18%

DAMAGE CALC

252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Diancie-Mega: 360-426 (118.4 - 140.1%) -- guaranteed OHKO

View Landorus-Therian counters → Teams with Landorus-Therian →

Tapu Fini

WaterFairy SOFT CHECK

24.486

47.9% dies 10.10%

DAMAGE CALCMisty Terrain

252+ SpA Tapu Fini Surf vs. 252 HP / 252+ SpD Diancie-Mega: 176-210 (57.8 - 69%) -- guaranteed 2HKO

View Tapu Fini counters → Teams with Tapu Fini →

Garchomp

DragonGround SOFT CHECK

23.154

42.6% dies 10.28%

DAMAGE CALC

252+ Atk Garchomp Earthquake vs. 252 HP / 0 Def Diancie-Mega: 332-392 (109.2 - 128.9%) -- guaranteed OHKO

View Garchomp counters → Teams with Garchomp →

Tornadus-Therian

Flying SOFT CHECK

84.31

26.2% dies 8.20%

DAMAGE CALC

252+ SpA Tornadus-Therian Focus Blast vs. 252 HP / 252+ SpD Diancie-Mega: 86-102 (28.2 - 33.5%) -- 0.1% chance to 3HKO

View Tornadus-Therian counters → Teams with Tornadus-Therian →

Heatran

FireSteel SOFT CHECK

52.984

19.3% dies 7.65%

DAMAGE CALC

252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Diancie-Mega: 146-174 (48 - 57.2%) -- 91.8% chance to 2HKO

View Heatran counters → Teams with Heatran →

Ranked #23 with 8.04% usage. Sorted by reliability score.