Is Rillaboom viable in Gen 9 Champions VGC 2026 Reg M-C?

Rillaboom is ranked #1 in Gen 9 Champions VGC 2026 Reg M-C with 46.60% usage according to Smogon Sep 2026 data.

What beats Rillaboom in Gen 9 Champions VGC 2026 Reg M-C?

Incineroar has the strongest conservative score in this observed Sep 2026 sample. The target was knocked out or switched out in 44.0% of 37.48093741659451 relevant encounters. Standard error is 8.1 points. Sets and switch conditions can change the result.

How are Rillaboom matchup checks ranked in Gen 9 Champions VGC 2026 Reg M-C?

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 Champions VGC 2026 Reg M-C · Smogon source period Sep 2026

#0812 Rillaboom

Grass

USAGE 46.6% #1

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 98.7% Fake Out 98.6% Wood Hammer 85.2% U-turn 47.3% High Horsepower 44.6% Protect 14.7% Superpower 2.9% Drum Beating 2.1%

Items

Miracle Seed 62.5% Sitrus Berry 9.6% Life Orb 8.4% Eject Button 5.7% Occa Berry 5.1% Leftovers 2.5% Grassy Seed 2.0% Coba Berry 1.0%

Abilities

Grassy Surge99.8%Overgrow0.2%

Common Teammates

Browse Gen 9 Champions VGC 2026 Reg M-C teams using Rillaboom →

Explore Rillaboom + Incineroar teams 12 score Explore Rillaboom + Sneasler teams 11 score Explore Rillaboom + Indeedee-F teams 7 score Explore Rillaboom + Rillaboom teams 5 score

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 + Incineroar 44.4% 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

Incineroar

FireDark SOFT CHECK View matchup

37.481

11.6

44.0% Standard error 8.11 points

DAMAGE CALCGrassy Terrain

252+ Atk Incineroar Flare Blitz vs. 252 HP / 0 Def Rillaboom: 224-266 (108.2 - 128.5%) -- guaranteed OHKO

View Incineroar counters → Teams with Incineroar →

Sneasler

FightingPoison SOFT CHECK View matchup

34.135

11.0

45.1% Standard error 8.52 points

DAMAGE CALCGrassy Terrain

252+ Atk Sneasler Dire Claw vs. 252 HP / 0 Def Rillaboom: 168-198 (81.1 - 95.6%) -- guaranteed 2HKO after Grassy Terrain recovery

View Sneasler counters → Teams with Sneasler →

Indeedee-F

PsychicNormal SOFT CHECK View matchup

35.352

6.7

39.6% Standard error 8.22 points

DAMAGE CALCPsychic Terrain

252+ SpA Indeedee-F Terrain Pulse (100 BP Psychic) vs. 252 HP / 252+ SpD Rillaboom in Psychic Terrain: 88-105 (42.5 - 50.7%) -- 2% chance to 2HKO

View Indeedee-F counters → Teams with Indeedee-F →

Rillaboom

Grass SOFT CHECK View matchup

27.945

4.9

42.3% Standard error 9.35 points

DAMAGE CALCGrassy Terrain

252+ Atk Rillaboom U-turn vs. 252 HP / 0 Def Rillaboom: 94-112 (45.4 - 54.1%) -- 3.1% chance to 2HKO after Grassy Terrain recovery

View Rillaboom counters → Teams with Rillaboom →

Ranked #1 with 46.60% usage. Sorted by conservative score.