Rillaboom.
Gen 9 Ubers usage profile · rank #147
august 2026 · 78.0K battles
august 2026 · 78.0K battles
grassPokédex entry ↗
Usage · August 2026
0.1%
Rillaboom is ranked #147 in Gen 9 Ubers, carried by 3,041 teams
TierD · outside the top 60
Ladder rank#147 of 211
Raw count3,041
Viability ceiling81
Month on month+0.03pp
13 month peak0.4%
FormatGen 9 Ubers
Base statsspecies values, before EVs and natureBST 530
HP
100
Atk
125
Def
90
SpA
60
SpD
70
Spe
85
Usage over time0.1%▲ 0.03pppeak 0.4% · Dec '25
hover a month for the exact figure · 13 months of ladder history
Most used set
13.0% of Rillaboom teamsHP
252
Atk
252
Def
0
SpA
0
SpD
4
Spe
0
NatureAdamant
AbilityGrassy Surge · 99.5%
ItemAssault Vest · 34.5%
Tera typeGrass · 54.5%
Moves
98.2%
70.7%
49.5%
46.5%
Alternative spreads
over 5% usageAdamant4 HP / 252 Atk / 252 Spe12.2%
Jolly4 HP / 252 Atk / 252 Spe11.3%
Moves
9 tracked98.2%
70.7%
49.5%
46.5%
43.5%
30.8%
17.5%
14.1%
12.2%
Items
34.5%
30.4%
10.5%
9.6%
6.4%
4.2%
Tera types
54.5%
19.2%
6.5%
6.3%
5.9%
3.8%
Abilities
99.5%
0.5%
EV spreads
top 6Adamant252 HP / 252 Atk / 4 SpD13.0%
Adamant4 HP / 252 Atk / 252 Spe12.2%
Jolly4 HP / 252 Atk / 252 Spe11.3%
Careful252 Atk / 4 Def / 252 SpD9.2%
Jolly252 Atk / 4 SpD / 252 Spe8.2%
Careful252 Atk / 132 Def / 124 SpD7.2%
Top teammates
share of teams
Best Rillaboom build for Gen 9 Ubers
The set above is the one Gen 9 Ubers players run most often, taken from 78,012 battles in August 2026. Rillaboom sits at rank #147 with 0.1% usage, which puts it in D tier, up 0.03 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.