Is Rillaboom viable in Gen 9 National Dex?

Rillaboom is ranked #56 in Gen 9 National Dex with 3.15% usage according to Smogon Jul 2026 - Sep 2026 data.

What beats Rillaboom in Gen 9 National Dex?

Corviknight has the strongest conservative score in this observed Jul 2026 - Sep 2026 sample. The target was knocked out or switched out in 56.1% of 46.39158529033972 relevant encounters. Standard error is 7.3 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 · Smogon source period Jul 2026 - Sep 2026

#0812 Rillaboom

Grass

USAGE 3.1% #56

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 99.0% U-turn 84.8% Wood Hammer 84.6% Knock Off 63.0% Superpower 29.9% Swords Dance 15.4% High Horsepower 6.7% Drain Punch 4.5%

Items

Choice Band 76.1% Life Orb 5.3% Terrain Extender 4.4% Miracle Seed 2.6% Leftovers 2.6% Grassium Z 1.9% Grassy Seed 1.7% Assault Vest 1.5%

Abilities

Grassy Surge100.0%Overgrow0.0%

Common Teammates

Ogerpon-Wellspring15.3%

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 31.0% 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

Corviknight

FlyingSteel DEFENSIVE CHECK View matchup

46.392

27.0

56.1% Standard error 7.29 points

DAMAGE CALCGrassy Terrain

252+ Atk Choice Band Rillaboom Superpower vs. 252 HP / 252+ Def Corviknight: 146-172 (36.5 - 43%) -- guaranteed 3HKO

View Corviknight counters → Teams with Corviknight →

Kingambit

DarkSteel SOFT CHECK View matchup

24.582

13.2

53.4% Standard error 10.06 points

DAMAGE CALCGrassy Terrain

252+ Atk Black Glasses Kingambit Knock Off (97.5 BP) vs. 252 HP / 0 Def Rillaboom: 237-279 (58.6 - 69%) -- guaranteed 2HKO after Grassy Terrain recovery

View Kingambit counters → Teams with Kingambit →

Zamazenta

Fighting SOFT CHECK View matchup

25.691

11.0

50.4% Standard error 9.86 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 →

Gliscor

GroundFlying SOFT CHECK View matchup

65.014

10.9

34.4% Standard error 5.89 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 →

Zapdos

ElectricFlying SOFT CHECK View matchup

23.473

10.5

51.7% Standard error 10.31 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 →

Landorus-Therian

GroundFlying SOFT CHECK View matchup

45.885

-0.5

25.1% Standard error 6.40 points

DAMAGE CALCGrassy Terrain

252+ Atk Landorus-Therian Fly vs. 252 HP / 0 Def Rillaboom: 384-452 (95 - 111.8%) -- 68.8% chance to OHKO

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

Tapu Lele

PsychicFairy SOFT CHECK View matchup

21.707

-2.8

39.1% Standard error 10.47 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

74.606

-4.1

9.5% Standard error 3.40 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 →

Ogerpon-Wellspring

GrassWater SOFT CHECK View matchup

34.81

-6.6

21.1% Standard error 6.92 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 →

Iron Valiant

FairyFighting SOFT CHECK View matchup

20.78

-10.5

29.6% Standard error 10.01 points

DAMAGE CALCGrassy Terrain

0- Atk Iron Valiant Close Combat vs. 252 HP / 0 Def Rillaboom: 160-189 (39.6 - 46.7%) -- guaranteed 3HKO after Grassy Terrain recovery

View Iron Valiant counters → Teams with Iron Valiant →

Ting-Lu

DarkGround SOFT CHECK View matchup

32.03

-11.2

9.9% Standard error 5.27 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 →

Ranked #56 with 3.15% usage. Sorted by conservative score.