Is Diancie-Mega viable in Gen 9 National Dex?

Diancie-Mega is ranked #20 in Gen 9 National Dex with 9.03% usage according to Smogon Apr 2026 - Jun 2026 data.

What beats Diancie-Mega in Gen 9 National Dex?

The best counter for Diancie-Mega in Gen 9 National Dex is Ogerpon-Wellspring with a 83.5% win rate when they meet. Based on Smogon's Apr 2026 - Jun 2026 usage data, the top Pokémon that beat Diancie-Mega include Ogerpon-Wellspring, Scizor-Mega, Swampert-Mega, Venusaur-Mega, Ursaluna.

What is the best counter for Diancie-Mega in Gen 9 National Dex?

Ogerpon-Wellspring is the best counter for Diancie-Mega in Gen 9 National Dex, KOing or forcing it out in 83.5% of their encounters.

Diancie-Mega counters

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

#0719 Diancie-Mega

RockFairy

USAGE 9.0% #20

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

Moonblast 98.7% Diamond Storm 66.2% Earth Power 63.9% Mystical Fire 56.2% Stealth Rock 37.3% Endeavor 17.3% Substitute 16.5% Spikes 12.7%

Items

Diancite 100.0%

Common Teammates

Ogerpon-Wellspring38.7%

Landorus-Therian38.5%

Checks & Counters

Reliability ranks observed matchups; KO rate is how often the checker knocked out or forced out the target. “Checker faints” reports the checker's own observed death rate. Categories use matchup reliability plus offensive and defensive base stats.

How to read this table

Use encounter count to judge sample size. A high-reliability check with a modest KO rate can still be useful when it consistently forces switches or limits the target.

# Checker Encounters Reliability KO Rate

Ogerpon-Wellspring

GrassWater OFFENSIVE CHECK

167.107

83.5% checker faints 4.70%

DAMAGE CALC

252+ Atk Wellspring Mask Ogerpon-Wellspring Power Whip vs. 252 HP / 0 Def Diancie-Mega: 450-530 (148 - 174.3%) -- guaranteed OHKO

View Ogerpon-Wellspring counters → Teams with Ogerpon-Wellspring →

Scizor-Mega

BugSteel OFFENSIVE CHECK

116.686

79.9% checker faints 6.20%

DAMAGE CALC

252+ Atk Technician Scizor-Mega Bullet Punch vs. 252 HP / 0 Def Diancie-Mega: 444-528 (146 - 173.6%) -- guaranteed OHKO

View Scizor-Mega counters →

Swampert-Mega

WaterGround OFFENSIVE CHECK

20.945

76.4% checker faints 9.28%

DAMAGE CALC

252+ Atk Swampert-Mega Earthquake vs. 252 HP / 0 Def Diancie-Mega: 368-434 (121 - 142.7%) -- guaranteed OHKO

View Swampert-Mega counters →

Venusaur-Mega

GrassPoison DEFENSIVE COUNTER

120.181

73.6% checker faints 6.91%

DAMAGE CALC

0- Atk Diancie-Mega Diamond Storm vs. 252 HP / 0 Def Venusaur-Mega: 123-145 (33.7 - 39.8%) -- guaranteed 3HKO

View Venusaur-Mega counters →

Ursaluna

GroundNormal OFFENSIVE CHECK

50.768

73.2% checker faints 8.57%

DAMAGE CALC

252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Diancie-Mega: 420-494 (138.1 - 162.5%) -- guaranteed OHKO

View Ursaluna counters →

Chansey

Normal DEFENSIVE COUNTER

28.965

72.6% checker faints 8.28%

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 →

Zamazenta

Fighting OFFENSIVE CHECK

273.161

67.4% checker faints 4.70%

DAMAGE CALC

252+ Atk Zamazenta Heavy Slam (120 BP) vs. 252 HP / 0 Def Diancie-Mega: 500-592 (164.4 - 194.7%) -- guaranteed OHKO

View Zamazenta counters → Teams with Zamazenta →

Clodsire

PoisonGround DEFENSIVE COUNTER

62.196

66.0% checker faints 6.01%

DAMAGE CALC

252+ SpA Diancie-Mega Earth Power vs. 252 HP / 252+ SpD Clodsire: 182-216 (39.2 - 46.5%) -- guaranteed 3HKO after Black Sludge recovery

View Clodsire counters → Teams with Clodsire →

Melmetal

Steel DEFENSIVE COUNTER

136.541

64.8% checker faints 6.96%

DAMAGE CALC

252+ SpA Diancie-Mega Earth Power vs. 252 HP / 252+ SpD Melmetal: 238-280 (50.2 - 59%) -- guaranteed 2HKO

View Melmetal counters →

Iron Valiant

FairyFighting OFFENSIVE CHECK

106.535

64.6% checker faints 7.90%

DAMAGE CALC

252+ Atk Iron Valiant Close Combat vs. 252 HP / 0 Def Diancie-Mega: 199-235 (65.4 - 77.3%) -- guaranteed 2HKO

View Iron Valiant counters → Teams with Iron Valiant →

Gholdengo

SteelGhost OFFENSIVE CHECK

310.247

64.5% checker faints 4.64%

DAMAGE CALC

252+ SpA Gholdengo Make It Rain vs. 252 HP / 252+ SpD Diancie-Mega: 592-700 (194.7 - 230.2%) -- guaranteed OHKO

View Gholdengo counters → Teams with Gholdengo →

Gliscor

GroundFlying DEFENSIVE COUNTER

257.789

63.6% checker faints 5.15%

DAMAGE CALC

252+ SpA Diancie-Mega Moonblast vs. 252 HP / 252+ SpD Gliscor: 172-204 (48.5 - 57.6%) -- 94.5% chance to 2HKO

View Gliscor counters → Teams with Gliscor →

Tapu Lele

PsychicFairy OFFENSIVE CHECK

89.37

62.7% checker faints 8.72%

DAMAGE CALCPsychic Terrain

252+ SpA Tapu Lele Future Sight vs. 252 HP / 252+ SpD Diancie-Mega in Psychic Terrain: 189-223 (62.1 - 73.3%) -- guaranteed 2HKO

View Tapu Lele counters → Teams with Tapu Lele →

Lopunny-Mega

NormalFighting OFFENSIVE CHECK

43.064

62.5% checker faints 10.41%

DAMAGE CALC

252+ Atk Lopunny-Mega Close Combat vs. 252 HP / 0 Def Diancie-Mega: 205-243 (67.4 - 79.9%) -- guaranteed 2HKO

View Lopunny-Mega counters →

Iron Treads

GroundSteel DEFENSIVE COUNTER

181.404

58.4% checker faints 6.24%

DAMAGE CALC

252+ SpA Diancie-Mega Earth Power vs. 252 HP / 252+ SpD Iron Treads: 226-268 (58.8 - 69.7%) -- guaranteed 2HKO after Leftovers recovery

View Iron Treads counters → Teams with Iron Treads →

Urshifu-Rapid-Strike

FightingWater OFFENSIVE CHECK

84.472

58.1% checker faints 7.29%

DAMAGE CALC

252+ Atk Urshifu-Rapid-Strike Surging Strikes (3 hits) vs. 252 HP / 0 Def Diancie-Mega on a critical hit: 384-456 (126.3 - 150%) -- guaranteed OHKO

View Urshifu-Rapid-Strike counters → Teams with Urshifu-Rapid-Strike →

Keldeo

WaterFighting OFFENSIVE CHECK

31.274

55.7% checker faints 8.88%

DAMAGE CALC

252+ SpA Keldeo Hydro Pump vs. 252 HP / 252+ SpD Diancie-Mega: 266-314 (87.5 - 103.2%) -- 18.8% chance to OHKO

View Keldeo counters →

Ting-Lu

DarkGround SOFT CHECK

117.161

54.2% checker faints 7.72%

DAMAGE CALC

252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Diancie-Mega: 294-348 (96.7 - 114.4%) -- 81.3% chance to OHKO

View Ting-Lu counters → Teams with Ting-Lu →

Rillaboom

Grass SOFT CHECK

31.949

53.6% checker faints 8.82%

DAMAGE CALCGrassy Terrain

252+ Atk Choice Band Rillaboom Wood Hammer vs. 252 HP / 0 Def Diancie-Mega in Grassy Terrain: 750-884 (246.7 - 290.7%) -- guaranteed OHKO

View Rillaboom counters →

Kingambit

DarkSteel SOFT CHECK

166.171

53.6% checker faints 6.49%

DAMAGE CALC

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

View Kingambit counters → Teams with Kingambit →

Terapagos

Normal SOFT CHECK

162.08

52.7% checker faints 6.72%

DAMAGE CALC

0- SpA Terapagos Earth Power vs. 252 HP / 252+ SpD Diancie-Mega: 56-68 (18.4 - 22.3%) -- possible 5HKO

View Terapagos counters → Teams with Terapagos →

Landorus-Therian

GroundFlying SOFT CHECK

281.458

51.9% checker faints 4.97%

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 →

Dragonite

DragonFlying SOFT CHECK

132.07

51.0% checker faints 7.48%

DAMAGE CALC

252+ Atk Dragonite Earthquake vs. 252 HP / 0 Def Diancie-Mega: 226-268 (74.3 - 88.1%) -- guaranteed 2HKO

View Dragonite counters → Teams with Dragonite →

Diancie-Mega

RockFairy SOFT CHECK

66.17

48.7% checker faints 8.50%

DAMAGE CALC

252+ SpA Diancie-Mega Earth Power vs. 252 HP / 252+ SpD Diancie-Mega: 170-202 (55.9 - 66.4%) -- guaranteed 2HKO

View Diancie-Mega counters →

Great Tusk

GroundFighting SOFT CHECK

177.888

47.7% checker faints 6.18%

DAMAGE CALC

252+ Atk Great Tusk Headlong Rush vs. 252 HP / 0 Def Diancie-Mega: 402-474 (132.2 - 155.9%) -- guaranteed OHKO

View Great Tusk counters → Teams with Great Tusk →

Ferrothorn

GrassSteel SOFT CHECK

65.052

46.5% checker faints 8.49%

DAMAGE CALC

252+ Atk Ferrothorn Power Whip vs. 252 HP / 0 Def Diancie-Mega: 320-378 (105.2 - 124.3%) -- guaranteed OHKO

View Ferrothorn counters → Teams with Ferrothorn →

Tapu Koko

ElectricFairy SOFT CHECK

56.343

44.5% checker faints 9.27%

DAMAGE CALCElectric Terrain

252+ SpA Choice Specs Tapu Koko Thunderbolt vs. 252 HP / 252+ SpD Diancie-Mega in Electric Terrain: 171-202 (56.2 - 66.4%) -- guaranteed 2HKO

View Tapu Koko counters →

Raging Bolt

ElectricDragon SOFT CHECK

126.073

37.7% checker faints 7.45%

DAMAGE CALC

252+ SpA Choice Specs Raging Bolt Thunderbolt vs. 252 HP / 252+ SpD Diancie-Mega: 169-201 (55.5 - 66.1%) -- guaranteed 2HKO

View Raging Bolt counters → Teams with Raging Bolt →

Toxapex

PoisonWater SOFT CHECK

134.803

37.3% checker faints 6.94%

DAMAGE CALC

252+ SpA Toxapex Scald vs. 252 HP / 252+ SpD Diancie-Mega: 114-134 (37.5 - 44%) -- guaranteed 3HKO

View Toxapex counters → Teams with Toxapex →

Ribombee

BugFairy SOFT CHECK

20.886

37.2% checker faints 10.58%

DAMAGE CALC

252+ SpA Ribombee Hidden Power Steel vs. 252 HP / 252+ SpD Diancie-Mega: 156-188 (51.3 - 61.8%) -- guaranteed 2HKO

View Ribombee counters →

Ranked #20 with 9.03% usage. Sorted by reliability score.