Rillaboom.
Gen 9 Doubles OU usage profile · rank #3
august 2026 · 203.7K battles
august 2026 · 203.7K battles
grassPokédex entry ↗
Usage · August 2026
24.8%
Rillaboom is ranked #3 in Gen 9 Doubles OU, carried by 47,366 teams
TierS · top 5 of the format
Ladder rank#3 of 245
Raw count47,366
Viability ceiling96
Month on month+0.30pp
13 month peak28.9%
FormatGen 9 Doubles OU
Base statsspecies values, before EVs and natureBST 530
HP
100
Atk
125
Def
90
SpA
60
SpD
70
Spe
85
Usage over time24.8%▲ 0.30pppeak 28.9% · Nov '25
hover a month for the exact figure · 13 months of ladder history
Most used set
15.4% of Rillaboom teamsHP
252
Atk
252
Def
0
SpA
0
SpD
4
Spe
0
NatureAdamant
AbilityGrassy Surge · 100.0%
ItemAssault Vest · 85.5%
Tera typeFire · 66.5%
Moves
97.7%
89.0%
88.4%
86.9%
Alternative spreads
over 5% usageAdamant72 HP / 252 Atk / 184 Spe10.0%
Adamant252 HP / 148 Atk / 44 Def / 60 SpD / 4 Spe5.5%
Moves
6 tracked97.7%
89.0%
88.4%
86.9%
13.5%
10.5%
Items
85.5%
10.1%
Tera types
66.5%
11.9%
10.4%
7.7%
Abilities
100.0%
0.0%
EV spreads
top 6Adamant252 HP / 252 Atk / 4 SpD15.4%
Adamant72 HP / 252 Atk / 184 Spe10.0%
Adamant252 HP / 148 Atk / 44 Def / 60 SpD / 4 Spe5.5%
Adamant252 HP / 124 Atk / 108 Def / 24 Spe5.0%
Adamant252 HP / 136 Atk / 120 SpD3.5%
Adamant156 HP / 252 Atk / 100 Spe3.3%
Top teammates
share of teams
Best Rillaboom build for Gen 9 Doubles OU
The set above is the one Gen 9 Doubles OU players run most often, taken from 203,650 battles in August 2026. Rillaboom sits at rank #3 with 24.8% usage, which puts it in S tier, up 0.30 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.