Is Rillaboom viable in Gen 9 National Dex?

Rillaboom is ranked #49 in Gen 9 National Dex with 3.44% usage according to Smogon May 2026 - Jul 2026 data.

What beats Rillaboom in Gen 9 National Dex?

Dragonite has the strongest conservative score in this observed May 2026 - Jul 2026 sample. The target was knocked out or switched out in 86.0% of 41.05272362315263 relevant encounters. Standard error is 7.6 points. Sets and switch conditions can change the result.

How are Rillaboom matchup checks ranked in Gen 9 National Dex?

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

Rillaboom counters

Gen 9 National Dex · Sorted by p − 4 standard errors · Smogon source period May 2026 - Jul 2026 · Generated 2026-08-05

#0812 Rillaboom

Grass

USAGE 3.4% #49

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 99.6% U-turn 87.1% Wood Hammer 83.6% Knock Off 62.3% Superpower 27.6% Swords Dance 18.4% High Horsepower 7.0% Drain Punch 5.5%

Items

Choice Band 74.2% Life Orb 7.7% Grassium Z 7.2% Terrain Extender 3.9% Leftovers 1.5% Grassy Seed 1.4% Assault Vest 1.3% Choice Scarf 0.7%

Abilities

Grassy Surge100.0%Overgrow0.0%

Common Teammates

Urshifu-Rapid-Strike15.6%

Leading observed checks

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

Team core to explore

Rillaboom + Great Tusk 35.1% 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

Dragonite

DragonFlying OFFENSIVE CHECK View matchup

41.053

55.7

86.0% Standard error 7.59 points

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 CHECK View matchup

20.206

45.8

80.8% Standard error 8.76 points

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 View matchup

22.063

43.9

78.7% Standard error 8.71 points

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 →

Gholdengo

SteelGhost OFFENSIVE CHECK View matchup

54.676

27.2

63.2% Standard error 8.99 points

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 View matchup

90.236

22.6

58.3% Standard error 8.91 points

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 →

Kingambit

DarkSteel DEFENSIVE CHECK View matchup

49.768

19.4

58.7% Standard error 9.81 points

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 →

Zamazenta

Fighting SOFT CHECK View matchup

86.71

17.5

54.1% Standard error 9.15 points

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 →

Corviknight

FlyingSteel SOFT CHECK View matchup

48.608

13.9

54.3% Standard error 10.09 points

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 →

Hatterene

PsychicFairy SOFT CHECK View matchup

22.621

9.9

52.0% Standard error 10.50 points

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 →

Gliscor

GroundFlying SOFT CHECK View matchup

126.386

5.6

34.8% Standard error 7.30 points

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 →

Garchomp

DragonGround SOFT CHECK View matchup

66.767

4.7

38.0% Standard error 8.34 points

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 →

Terapagos

Normal SOFT CHECK View matchup

44.134

4.1

46.5% Standard error 10.59 points

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 →

Toxapex

PoisonWater SOFT CHECK View matchup

35.325

-0.7

30.2% Standard error 7.73 points

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 →

Great Tusk

GroundFighting SOFT CHECK View matchup

64.869

-1.7

30.7% Standard error 8.09 points

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 →

Ogerpon-Wellspring

GrassWater SOFT CHECK View matchup

120.636

-4.1

21.1% Standard error 6.29 points

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 →

Landorus-Therian

GroundFlying SOFT CHECK View matchup

97.496

-4.1

25.8% Standard error 7.48 points

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 →

Diancie-Mega

RockFairy SOFT CHECK View matchup

31.949

-4.6

26.7% Standard error 7.83 points

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 → Teams with Diancie-Mega →

Tapu Lele

PsychicFairy SOFT CHECK View matchup

26.089

-5.0

31.3% Standard error 9.08 points

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 →

Alomomola

Water SOFT CHECK View matchup

140.163

-6.9

12.3% Standard error 4.80 points

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 →

Ting-Lu

DarkGround SOFT CHECK View matchup

67.706

-10.3

11.4% Standard error 5.44 points

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 →

Iron Valiant

FairyFighting SOFT CHECK View matchup

20.78

-10.5

29.6% Standard error 10.01 points

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 →

Iron Treads

GroundSteel SOFT CHECK View matchup

20.915

-12.1

26.5% Standard error 9.65 points

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 →

Urshifu-Rapid-Strike

FightingWater SOFT CHECK View matchup

22.21

-14.4

18.8% Standard error 8.28 points

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 →

Ranked #49 with 3.44% usage. Sorted by conservative score.