Rillaboom.
Champions BSS Reg M-C usage profile · rank #10
september 2026 · 69.5K battles
september 2026 · 69.5K battles
grassPokédex entry ↗
Usage · September 2026
14.8%
Rillaboom is ranked #10 in Champions BSS Reg M-C, carried by 23,072 teams
TierA · top 15 of the format
Ladder rank#10 of 278
Raw count23,072
Viability ceiling78
Month on month+14.84pp
13 month peak14.8%
FormatChampions BSS Reg M-C
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sets and counters from 69.5K battles
Base statsspecies values, before EVs and natureBST 530
HP
100
Atk
125
Def
90
SpA
60
SpD
70
Spe
85
Usage over time14.8%▲ 14.84pppeak 14.8% · Sep '26
hover a month for the exact figure · 13 months of ladder history
Most used set
17.3% of Rillaboom teamsHP
32
Atk
32
Def
0
SpA
0
SpD
0
Spe
2
NatureAdamant
AbilityGrassy Surge · 99.3%
ItemMiracle Seed · 30.5%
EV spread32 HP / 32 Atk / 2 Spe
Moves
95.4%
72.9%
55.5%
52.4%
Alternative spreads
over 5% usageAdamant2 HP / 32 Atk / 32 Spe15.5%
Adamant32 HP / 32 Atk / 2 SpD11.2%
Moves
11 tracked95.4%
72.9%
55.5%
52.4%
50.9%
26.3%
10.5%
6.3%
4.8%
4.8%
3.3%
Items
30.5%
28.2%
10.6%
9.3%
8.0%
5.3%
1.4%
1.3%
1.3%
Abilities
99.3%
0.7%
EV spreads
top 6Adamant32 HP / 32 Atk / 2 Spe17.3%
Adamant2 HP / 32 Atk / 32 Spe15.5%
Adamant32 HP / 32 Atk / 2 SpD11.2%
Jolly2 HP / 32 Atk / 32 Spe10.8%
Adamant32 HP / 18 Atk / 16 SpD4.8%
Careful32 HP / 2 Atk / 32 SpD3.2%
Top teammates
share of teams
Best Rillaboom build for Champions BSS Reg M-C
The set above is the one Champions BSS Reg M-C players run most often, taken from 69,462 battles in September 2026. Rillaboom sits at rank #10 with 14.8% usage, which puts it in A tier, up 14.84 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.