CobblewikiCobblemon 1.7.4 · Updated May 26, 2026

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#812

Rillaboom

grass
In game
rillaboom

Basic Information

Height

2.1m

Weight

90kg

Male Ratio

88%

Catch Rate

45

Base Exp

265

Exp Group

medium slow

Base Friendship

50

Egg Cycles

20

Abilities

overgrowgrassysurge (Hidden)

Egg Groups

fieldgrass

Labels

gen8

EV Yield

hp0
attack3
defence0
special Attack0
special Defence0
speed0

Base Stats

hp100
attack125
defence90
special Attack60
special Defence70
speed85
Total530

Movement

Can Swim

Yes

Drops

Max Rolls: 3

Stick×1–2100%
Miracle Seed×125%

Hitbox

Width

1.6

Height

2.3

Fixed: No

Behavior

Combat

Will defend owner

Resting

Drowsy chance: 3.3%

Additional Information

Pre-Evolution

thwackey

Base Scale

0.95

Evolution Line

How to evolve Rillaboom
grookey
grookey
thwackey
thwackey
Lv. 16
rillaboom
rillaboom
Lv. 35

Evolution guide

Grookey evolves into Thwackey when you reach level 16.

Thwackey evolves into Rillaboom when you reach level 35.

Where does Rillaboom spawn?

Ultra RareLevel 35-53

Sky light: 8–15

Needs base blocks

Trees

How to find Rillaboom faster

Cook a Pokésnack

Craft a Pokésnack in a campfire pot using milk, honey bottle, vivichoke, and hearty grains. Add up to 3 seasoning items to customise which Pokémon appear.

Items that attract Rillaboom

cobblemon:rindo_berryRindo Berry
Type: grass
cobblemon:rawst_berryRawst Berry
Egg group: field
cobblemon:cheri_berryCheri Berry
Egg group: fairy · Egg group: grass

Regular catching

Best biomes and snacks for making Rillaboom appear.

BestTropical IslandUltra RareLv. 35-53
Base chance: <0.01%With snack: 0.33%

Recommended seasoning combo

2× Rindo Berry+Enchanted Golden Apple
JungleUltra RareLv. 35-53
Base chance: <0.01%With snack: 0.20%

Recommended seasoning combo

2× Cheri Berry+Enchanted Golden Apple

Shiny hunting

Best biomes and snacks for getting shiny Rillaboom, using Cobblemon's 1/8192 base shiny rate.

Best shinyTropical IslandUltra RareLv. 35-53
Base shiny chance: <0.0001%With shiny snack: 0.0009%Shiny rerolls: +18
Snack spawn chance: 0.38%

Shiny hunting combo

Rindo Berry+2× Enchanted Golden Apple
JungleUltra RareLv. 35-53
Base shiny chance: <0.0001%With shiny snack: 0.0005%Shiny rerolls: +18
Snack spawn chance: 0.22%

Shiny hunting combo

Cheri Berry+2× Enchanted Golden Apple

Quality boosters

Rarity boosters

Enchanted Golden Apple+10 tier
Glistering Melon Slice+1 tier
Golden Apple+1 tier
Golden Carrot+1 tier

Shiny boosters

Enchanted Golden Apple×9 rerolls
Starf Berry×4 rerolls
Golden Apple×1 rerolls

Moves

drumbeatingLv. 1
doublehitLv. 1
grassyterrainLv. 1
nobleroarLv. 1
scratchLv. 1
growlLv. 1
branchpokeLv. 1
tauntLv. 1
razorleafLv. 12
screechLv. 19
knockoffLv. 24
slamLv. 30
uproarLv. 38
woodhammerLv. 46
endeavorLv. 54
boomburstLv. 62
fakeoutEGG
growthEGG
hammerarmEGG
leechseedEGG
strengthEGG
worryseedEGG
acrobaticsTM
assuranceTM
bodypressTM
bodyslamTM
brickbreakTM
brutalswingTM
bulkupTM
bulldozeTM
bulletseedTM
darkestlariatTM
doubleedgeTM
drainpunchTM
earthpowerTM
earthquakeTM
endeavorTM
endureTM
energyballTM
facadeTM
falseswipeTM
flingTM
focusblastTM
focusenergyTM
focuspunchTM
frenzyplantTM
gigadrainTM
gigaimpactTM
grassknotTM
grasspledgeTM
grassyglideTM
grassyterrainTM
highhorsepowerTM
hyperbeamTM
hypervoiceTM
knockoffTM
leafstormTM
lowkickTM
lowsweepTM
magicalleafTM
megakickTM
megapunchTM
mudshotTM
naturepowerTM
protectTM
restTM
scaryfaceTM
screechTM
seedbombTM
sleeptalkTM
snarlTM
solarbeamTM
solarbladeTM
stompingtantrumTM
strengthTM
substituteTM
sunnydayTM
superpowerTM
swiftTM
swordsdanceTM
takedownTM
tauntTM
terablastTM
thiefTM
trailblazeTM
uproarTM
uturnTM
workupTM
worryseedTM
bulkupTUTOR
bulldozeTUTOR
drainpunchTUTOR
earthpowerTUTOR
endeavorTUTOR
energyballTUTOR
falseswipeTUTOR
focusenergyTUTOR
focuspunchTUTOR
frenzyplantTUTOR
gigadrainTUTOR
gigaimpactTUTOR
grasspledgeTUTOR
grassyglideTUTOR
highhorsepowerTUTOR
hyperbeamTUTOR
hypervoiceTUTOR
knockoffTUTOR
lowkickTUTOR
magicalleafTUTOR
restTUTOR
seedbombTUTOR
sleeptalkTUTOR
snarlTUTOR
stompingtantrumTUTOR
superpowerTUTOR
swiftTUTOR
uproarTUTOR
worryseedTUTOR
attractLEGACY
roundLEGACY
snoreLEGACY