Gen 9 OU usage profile · rank #32
september 2026 · 574.5K battles
september 2026 · 574.5K battles
grassPokédex entry ↗
Usage · September 2026
5.9%
Rillaboom is ranked #32 in Gen 9 OU, carried by 98,810 teams
TierC · top 60 of the format
Ladder rank#32 of 243
Raw count98,810
Viability ceiling88
Month on month+1.83pp
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 time5.9%▲ 1.83pppeak 9.7% · Sep '25
hover a month for the exact figure · 13 months of ladder history
Most used set
49.8% of Rillaboom teamsHP
0
Atk
252
Def
4
SpA
0
SpD
0
Spe
252
NatureAdamant
AbilityGrassy Surge · 100.0%
ItemLife Orb · 52.3%
Tera typeDark · 52.5%
Moves
99.5%
98.7%
60.6%
54.4%
Alternative spreads
over 5% usageAdamant252 Atk / 4 SpD / 252 Spe8.1%
Adamant80 HP / 252 Atk / 176 Spe5.2%
Moves
6 tracked99.5%
98.7%
60.6%
54.4%
39.4%
36.5%
Items
52.3%
17.3%
12.6%
6.1%
4.5%
3.1%
Tera types
52.5%
34.9%
5.2%
4.1%
Abilities
100.0%
0.0%
EV spreads
top 6Adamant252 Atk / 4 Def / 252 Spe49.8%
Adamant252 Atk / 4 SpD / 252 Spe8.1%
Adamant80 HP / 252 Atk / 176 Spe5.2%
Adamant4 HP / 252 Atk / 252 Spe4.7%
Jolly252 Atk / 4 Def / 252 Spe4.6%
Adamant204 HP / 252 Atk / 52 Spe3.6%
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 574,541 battles in September 2026. Rillaboom sits at rank #32 with 5.9% usage, which puts it in C tier, up 1.83 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.