Is Rillaboom viable in Gen 9 National Dex?

Rillaboom is ranked #51 in Gen 9 National Dex with 3.53% usage according to Smogon Apr 2026 - Jun 2026 data.

What beats Rillaboom in Gen 9 National Dex?

The best counter for Rillaboom in Gen 9 National Dex is Dragonite with a 86.7% win rate when they meet. Based on Smogon's Apr 2026 - Jun 2026 usage data, the top Pokémon that beat Rillaboom include Dragonite, Venusaur-Mega, Kyurem, Kingambit, Gholdengo.

What is the best counter for Rillaboom in Gen 9 National Dex?

Dragonite is the best counter for Rillaboom in Gen 9 National Dex, KOing or forcing it out in 86.7% of their encounters.

Rillaboom counters

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

#0812 Rillaboom

Grass

USAGE 3.5% #51

ABILITYGrassy Surge

BASE STATS

HP 100

ATK 125

DEF 90

SPA 60

SPD 70

SPE 85

BST530

TYPE MATCHUPS

2×

FireIcePoisonFlyingBug

½×

WaterElectricGrassGround

Moves

Grassy Glide 99.7% U-turn 86.2% Wood Hammer 80.2% Knock Off 71.0% Superpower 21.5% Swords Dance 19.5% Drain Punch 7.8% High Horsepower 6.8%

Items

Choice Band 72.1% Life Orb 8.3% Grassium Z 6.5% Terrain Extender 5.0% Leftovers 2.5% Grassy Seed 1.4% Assault Vest 1.3% Protective Pads 0.9%

Abilities

Grassy Surge99.9%Overgrow0.1%

Common Teammates

Urshifu-Rapid-Strike17.1%

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

Dragonite

DragonFlying OFFENSIVE CHECK

66.689

86.7% checker faints 7.16%

DAMAGE CALCGrassy Terrain

252+ Atk Dragonite Fly vs. 252 HP / 0 Def Rillaboom: 362-428 (89.6 - 105.9%) -- 37.5% chance to OHKO

View Dragonite counters → Teams with Dragonite →

Venusaur-Mega

GrassPoison DEFENSIVE COUNTER

20.206

80.8% checker faints 8.76%

DAMAGE CALCGrassy Terrain

252+ Atk Choice Band Rillaboom High Horsepower vs. 252 HP / 252+ Def Venusaur-Mega: 103-122 (28.2 - 33.5%) -- 96.1% chance to 4HKO after Grassy Terrain recovery

View Venusaur-Mega counters →

Kyurem

DragonIce OFFENSIVE CHECK

22.063

78.7% checker faints 8.71%

DAMAGE CALCGrassy Terrain

252+ SpA Kyurem Ice Beam vs. 252 HP / 252+ SpD Rillaboom: 290-344 (71.7 - 85.1%) -- guaranteed 2HKO after Grassy Terrain recovery

View Kyurem counters → Teams with Kyurem →

Kingambit

DarkSteel DEFENSIVE COUNTER

25.186

63.9% checker faints 9.57%

DAMAGE CALCGrassy Terrain

252+ Atk Choice Band Rillaboom Superpower vs. 252 HP / 252+ Def Kingambit: 532-628 (131.6 - 155.4%) -- guaranteed OHKO

View Kingambit counters → Teams with Kingambit →

Gholdengo

SteelGhost OFFENSIVE CHECK

82.032

61.4% checker faints 9.14%

DAMAGE CALCGrassy Terrain

252+ SpA Gholdengo Make It Rain vs. 252 HP / 252+ SpD Rillaboom: 198-234 (49 - 57.9%) -- 56.3% chance to 2HKO after Grassy Terrain recovery

View Gholdengo counters → Teams with Gholdengo →

Zapdos

ElectricFlying OFFENSIVE CHECK

87.423

61.0% checker faints 8.95%

DAMAGE CALCGrassy Terrain

252+ SpA Zapdos Hurricane vs. 252 HP / 252+ SpD Rillaboom: 348-410 (86.1 - 101.4%) -- 12.5% chance to OHKO

View Zapdos counters → Teams with Zapdos →

Zamazenta

Fighting OFFENSIVE CHECK

85.519

56.9% checker faints 9.14%

DAMAGE CALCGrassy Terrain

252+ Atk Zamazenta Close Combat vs. 252 HP / 0 Def Rillaboom: 222-262 (54.9 - 64.8%) -- guaranteed 2HKO after Grassy Terrain recovery

View Zamazenta counters → Teams with Zamazenta →

Hatterene

PsychicFairy SOFT CHECK

22.621

52.0% checker faints 10.50%

DAMAGE CALCGrassy Terrain

252+ SpA Hatterene Mystical Fire vs. 252 HP / 252+ SpD Rillaboom: 170-200 (42 - 49.5%) -- guaranteed 3HKO after Grassy Terrain recovery

View Hatterene counters → Teams with Hatterene →

Corviknight

FlyingSteel SOFT CHECK

24.019

51.6% checker faints 10.20%

DAMAGE CALCGrassy Terrain

252+ Atk Corviknight Brave Bird vs. 252 HP / 0 Def Rillaboom: 360-426 (89.1 - 105.4%) -- 31.3% chance to OHKO

View Corviknight counters → Teams with Corviknight →

Terapagos

Normal SOFT CHECK

44.134

46.5% checker faints 10.59%

DAMAGE CALCGrassy Terrain

0- SpA Terapagos Tera Starstorm vs. 252 HP / 252+ SpD Rillaboom: 75-88 (18.5 - 21.7%) -- possible 7HKO

View Terapagos counters → Teams with Terapagos →

Garchomp

DragonGround SOFT CHECK

66.767

38.0% checker faints 8.34%

DAMAGE CALCGrassy Terrain

252+ Atk Garchomp Outrage vs. 252 HP / 0 Def Rillaboom: 235-277 (58.1 - 68.5%) -- guaranteed 2HKO after Grassy Terrain recovery

View Garchomp counters → Teams with Garchomp →

Gliscor

GroundFlying SOFT CHECK

122.15

36.4% checker faints 7.52%

DAMAGE CALCGrassy Terrain

252+ Atk Gliscor Knock Off (97.5 BP) vs. 252 HP / 0 Def Rillaboom: 102-121 (25.2 - 29.9%) -- 0.1% chance to 4HKO after Grassy Terrain recovery

View Gliscor counters → Teams with Gliscor →

Great Tusk

GroundFighting SOFT CHECK

89.578

33.0% checker faints 8.56%

DAMAGE CALCGrassy Terrain

252+ Atk Great Tusk Close Combat vs. 252 HP / 0 Def Rillaboom: 237-280 (58.6 - 69.3%) -- guaranteed 2HKO after Grassy Terrain recovery

View Great Tusk counters → Teams with Great Tusk →

Tapu Lele

PsychicFairy SOFT CHECK

26.089

31.3% checker faints 9.08%

DAMAGE CALCPsychic Terrain

252+ SpA Tapu Lele Future Sight vs. 252 HP / 252+ SpD Rillaboom in Psychic Terrain: 253-298 (62.6 - 73.7%) -- guaranteed 2HKO

View Tapu Lele counters → Teams with Tapu Lele →

Iron Valiant

FairyFighting SOFT CHECK

24.142

31.1% checker faints 9.42%

DAMAGE CALCGrassy Terrain

252+ Atk Iron Valiant Close Combat vs. 252 HP / 0 Def Rillaboom: 235-277 (58.1 - 68.5%) -- guaranteed 2HKO after Grassy Terrain recovery

View Iron Valiant counters → Teams with Iron Valiant →

Toxapex

PoisonWater SOFT CHECK

35.325

30.2% checker faints 7.73%

DAMAGE CALCGrassy Terrain

252+ SpA Toxapex Sludge Bomb vs. 252 HP / 252+ SpD Rillaboom: 168-198 (41.5 - 49%) -- guaranteed 3HKO after Grassy Terrain recovery

View Toxapex counters → Teams with Toxapex →

Diancie-Mega

RockFairy SOFT CHECK

31.949

26.7% checker faints 7.83%

DAMAGE CALCGrassy Terrain

252+ SpA Diancie-Mega Mystical Fire vs. 252 HP / 252+ SpD Rillaboom: 190-224 (47 - 55.4%) -- 14.8% chance to 2HKO after Grassy Terrain recovery

View Diancie-Mega counters →

Iron Treads

GroundSteel SOFT CHECK

20.915

26.5% checker faints 9.65%

DAMAGE CALCGrassy Terrain

252+ Atk Iron Treads Ice Spinner vs. 252 HP / 0 Def Rillaboom: 190-224 (47 - 55.4%) -- 14.8% chance to 2HKO after Grassy Terrain recovery

View Iron Treads counters → Teams with Iron Treads →

Landorus-Therian

GroundFlying SOFT CHECK

108.541

22.8% checker faints 6.78%

DAMAGE CALCGrassy Terrain

252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Rillaboom: 354-417 (87.6 - 103.2%) -- 25% chance to OHKO

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

Ogerpon-Wellspring

GrassWater SOFT CHECK

85.826

21.1% checker faints 6.03%

DAMAGE CALCGrassy Terrain

252+ Atk Wellspring Mask Ogerpon-Wellspring U-turn vs. 252 HP / 0 Def Rillaboom: 208-246 (51.4 - 60.8%) -- 92.6% chance to 2HKO after Grassy Terrain recovery

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

Urshifu-Rapid-Strike

FightingWater SOFT CHECK

22.21

18.8% checker faints 8.28%

DAMAGE CALCGrassy Terrain

252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Rillaboom: 235-277 (58.1 - 68.5%) -- guaranteed 2HKO after Grassy Terrain recovery

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

Ting-Lu

DarkGround SOFT CHECK

35.676

12.8% checker faints 5.60%

DAMAGE CALCGrassy Terrain

252+ Atk Ting-Lu Payback (100 BP) vs. 252 HP / 0 Def Rillaboom: 175-207 (43.3 - 51.2%) -- guaranteed 3HKO after Grassy Terrain recovery

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

Alomomola

Water SOFT CHECK

126.877

12.3% checker faints 5.04%

DAMAGE CALCGrassy Terrain

252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 0 Def Rillaboom: 88-104 (21.7 - 25.7%) -- possible 5HKO

View Alomomola counters → Teams with Alomomola →

Ranked #51 with 3.53% usage. Sorted by reliability score.