grassPokédex entry ↗
Usage · August 2026
4.1%
Rillaboom is ranked #43 in Gen 9 OU, carried by 99,448 teams
TierC · top 60 of the format
Ladder rank#43 of 230
Raw count99,448
Viability ceiling91
Month on month-4.28pp
13 month peak9.7%
FormatGen 9 OU
Base statsspecies values, before EVs and natureBST 530
HP
100
Atk
125
Def
90
SpA
60
SpD
70
Spe
85
Usage over time4.1%▼ 4.28pppeak 9.7% · Sep '25
hover a month for the exact figure · 13 months of ladder history
Most used set
23.9% of Rillaboom teamsHP
0
Atk
252
Def
0
SpA
0
SpD
4
Spe
252
NatureAdamant
AbilityGrassy Surge · 100.0%
ItemLife Orb · 48.1%
Tera typeGrass · 39.3%
Moves
99.4%
97.0%
60.5%
57.4%
Alternative spreads
over 5% usageAdamant252 Atk / 4 Def / 252 Spe17.6%
Adamant4 HP / 252 Atk / 252 Spe15.9%
Moves
6 tracked99.4%
97.0%
60.5%
57.4%
39.6%
34.0%
Items
48.1%
17.9%
9.0%
7.7%
5.5%
4.5%
2.7%
Tera types
39.3%
36.8%
19.8%
Abilities
100.0%
0.0%
EV spreads
top 6Adamant252 Atk / 4 SpD / 252 Spe23.9%
Adamant252 Atk / 4 Def / 252 Spe17.6%
Adamant4 HP / 252 Atk / 252 Spe15.9%
Adamant32 HP / 252 Atk / 8 SpD / 216 Spe6.6%
Adamant72 HP / 252 Atk / 184 Spe4.0%
Adamant112 HP / 252 Atk / 144 Spe3.9%
Top teammates
share of teams
Best Rillaboom build for Gen 9 OU
The set above is the one Gen 9 OU players run most often, taken from 730,502 battles in August 2026. Rillaboom sits at rank #43 with 4.1% usage, which puts it in C tier, down 4.28 points on the month before.
These are usage numbers, not a recommendation from a council. A move at 90% is close to mandatory; anything under 30% is a tech pick that answers a specific matchup. Read the spreads the same way: the top spread is the safe default, and the alternatives usually trade bulk for speed or the other way round.
The checks and counters table is generated from real games rather than a type chart, so it accounts for items, Tera choices, and how often the matchup ends in a switch instead of a knockout.