Physical
Wallbreaker
530High
85Moderate
ATier

Rillaboom is a Grass-type from Gen 8. 5 type weaknesses to keep in mind. 125 base Attack is its best stat. It sits at a decent but contested Speed tier. Known as the Drummer Pokemon.

Nothing fancy in Rillaboom's spread. It leans physical with Attack out front. And you'll get 3 Attack EVs per KO for it. Follows a 1.06M XP medium-slow curve.

Base Stats
530High
HP100
B
Attack125
A
Defense90
B
Sp. Atk60
C
Sp. Def70
C
Speed85
C
Total530
Low <60
Avg 60-89
High 90-149
Top 150+
EV YieldDefeating Rillaboom yields +3 Atk
HPAtk+3DefSpASpDSpe
Details
Catch45ChallengingMedium Slow1.06M XP2.1m / 6'11"90kg / 198.4 lbs265Base XP
Pokedex Entries

Gigantamax energy has caused Rillaboom’s stump to grow into a drum set that resembles a forest.

Sword

Rillaboom has become one with its forest of drums and continues to lay down beats that shake all of Galar.

Shield

Rillaboom Weakness

Fragile

Rillaboom is weak to Fire, Ice, Poison, Flying, and Bug-type moves. The Grass typing picks up 4 resistances to work with.

4xCriticali
None
¼xResisti
None
0xImmunei
None
5Weak
4Resist
0Immune
Scorei-6
SpikesGrounded — up to 25%
Toxic SpikesVulnerable
Abilities
OvergrowStrengthens grass moves to inflict 1.5× damage at 1/3 max HP or less.
Grassy SurgeHAWhen this Pokémon enters battle, it changes the terrain to Grassy Terrain.

The three-stage chain from Grookey through Thwackey ends here at Rillaboom. Want more? Breed for Grookey eggs. A massive partner pool available via two egg groups. The evolution from Grookey pushed Rillaboom to 530 total stats. Attack saw the largest single gain at +60.

How to Evolve

3 Forms
Stat Comparison 3 Stages
Grookey
Grass
Rillaboom
Grass
HP
50
70+20
100+30
ATK
65
85+20
125+40
DEF
50
70+20
90+20
SP.ATK
40
55+15
60+5
SP.DEF
40
60+20
70+10
SPE
65
80+15
85+5
BST
310B-Tier
420C-Tier+110
530S-Tier+110
ROLE
Balanced
Balanced
Wallbreaker
TYPE
Physical
Physical
Physical
Breeding
Easy

Breed with Rillaboom to get Grookey eggs easily using 138 partners from the Ground and Plant egg groups. Notable egg moves include Fake Out, Growth, Hammer Arm and 4 more.

Egg Groups
GroundPlant
Gender
87.5%12.5%
Hatch Time
20 cycles·5,140 steps
Quick~5 min with Flame Body
Egg Moves
7moves
Breed With (best first)
raichupikachunidokinggolduckvenusaurroseraderillaboomrhydonshiftryexploudludicoloabomasnow

Rillaboom keeps momentum with U-turn, switching out after dealing damage or scouting. Assault Vest gives it a special bulk boost with no status moves allowed, max HP and Attack EVs let it hit hard on the way out, and the remaining moves prevents dead turns.

Best Build

Physical Tank
Ability
Grassy Surge
Item
Assault VestBULK
Nature
Adamant+ATK
EVs

Best Rillaboom Moveset

  • Fake Out
  • Grassy GlideSTAB
  • U Turn
  • Wood HammerSTAB

Recommended Teammates

Egg moves make a real difference. Rillaboom gets Fake Out and Growth exclusively through breeding, filling gaps that TMs and level-up can't touch. Normal and Dark coverage and more rounds out the picture alongside Leaf Storm and Solar Blade.

Level-Up Moves

Lv 1
Branch Poke
4010040Grass
Lv 1
Double Hit
359010Normal
Lv 1
Drum Beating
8010010Grass
Lv 1
Grassy Terrain
10Grass
Lv 1
Growl
10040Normal
Lv 1
Noble Roar
10030Normal
Lv 1
Scratch
4010035Normal
Lv 1
Taunt
10020Dark
Lv 12
Razor Leaf
559525Grass
Lv 19
Screech
8540Normal
Lv 24
Knock Off
6510020Dark
Lv 30
Slam
807520Normal
Lv 38
Uproar
9010010Normal
Lv 46
Wood Hammer
12010015Grass
Lv 54
Endeavor
1005Normal
Lv 62
Boomburst
14010010Normal

TM Moves

Src
TM78
Acrobatics
5510015Flying
TM58
Assurance
6010010Dark
TM31
Attract
10015Normal
TR99
Body Press
8010010Fighting
TR01
Body Slam
8510015Normal
TM43
Brick Break
7510015Fighting
TM97
Brutal Swing
6010020Dark
TR48
Bulk Up
20Fighting
TM81
Bulldoze
6010020Ground
TM50
Bullet Seed
2510030Grass
TR93
Darkest Lariat
8510010Dark
TM63
Drain Punch
7510010Fighting
TR67
Earth Power
9010010Ground
TR10
Earthquake
10010010Ground
TR26
Endure+4
10Normal
TR65
Energy Ball
9010010Grass
TM39
Facade
7010020Normal
TM94
False Swipe
4010040Normal
TM59
Fling
10010Dark
TR64
Focus Blast
120705Fighting
TR13
Focus Energy
30Normal
TM28
Giga Drain
7510010Grass
TM09
Giga Impact
150905Normal
TR77
Grass Knot
10020Grass
TM88
Grassy Terrain
10Grass
TR94
High Horsepower
959510Ground
TM08
Hyper Beam
150905Normal
TR42
Hyper Voice
9010010Normal
TR71
Leaf Storm
130905Grass
TR07
Low Kick
10020Fighting
TM10
Magical Leaf
6020Grass
TM01
Mega Kick
120755Normal
TM
Mega Punch
808520Normal
TM53
Mud Shot
559515Ground
TM25
Protect+4
10Normal
TM21
Rest
10Psychic
TM76
Round
6010015Normal
TM26
Scary Face
10010Normal
TM16
Screech
8540Normal
TR27
Sleep Talk
10Normal
TM85
Snarl
559515Dark
TM24
Snore
5010015Normal
TM11
Solar Beam
12010010Grass
TM12
Solar Blade
12510010Grass
TM98
Stomping Tantrum
7510010Ground
TR20
Substitute
10Normal
TM34
Sunny Day
5Fire
TR39
Superpower
1201005Fighting
TM40
Swift
6020Normal
TM
Swords Dance
20Normal
TR37
Taunt
10020Dark
TM56
U-turn
7010020Bug
TR35
Uproar
9010010Normal
TR85
Work Up
30Normal

Egg Moves

Src
Egg
Fake Out+3
4010010Normal
Egg
Growth
20Normal
Egg
Hammer Arm
1009010Fighting
Egg
Leech Seed
9010Grass
Egg
Nature Power
20Normal
Egg
Strength
8010015Normal
Egg
Worry Seed
10010Grass

Tutor Moves

Src
Tutor
Grassy Glide
7010020Grass

How to Obtain Rillaboom in Sword & Shield

  1. Grookey
    Step 1Obtain Grookey
  2. Thwackey
    Step 2Evolve into Thwackey
  3. Rillaboom
    Step 3Rillaboom
  • Rillaboom works as a wallbreaker with 530 BST behind it. A-Tier on our list — a strong competitive pick. That 125 base Attack does the heavy lifting.

  • Rillaboom's biggest threats include Blaziken (Fire), Weavile (Ice), and Salazzle (Poison), all carrying super-effective STAB moves. Flying and Bug-type attackers are also a problem. With 5 weakness types, most competitive teams carry at least one counter.

  • Thwackey evolves into Rillaboom at level 35. Rillaboom is the final evolution in a 3-stage line starting from Grookey. At 530 BST, it's got solid stats to work with.

  • Overgrow is the go-to ability for Rillaboom. It strengthens grass moves to inflict 1.5× damage at 1/3 max HP or less. Its hidden ability Grassy Surge can work in specific setups.

  • Rillaboom is a physical attacker with base 125 Attack. Enough bulk to take a hit or two, too. But the speed tells the real story — base 85 Speed is workable — faster than some, slower than many. Fits the wallbreaker role.

  • Rillaboom can be found in Scarlet & Violet and Sword & Shield.

Available since Sword & Shield, Rillaboom appears in 2 games spanning 2 generations. Beyond its original form, it gained a Gigantamax form in Generation 8.

  • Gen IYYellow box art
    Yellow
  • Gen IRB
    Red & Blue box artRed & Blue box art
    Red & Blue
  • Gen IIGS
    Gold & Silver box artGold & Silver box art
    Gold & Silver
  • Gen IICCrystal box art
    Crystal
  • Gen IIIRS
    Ruby & Sapphire box artRuby & Sapphire box art
    Ruby & Sapphire
  • Gen IIIFRLG
    FireRed & LeafGreen box artFireRed & LeafGreen box art
    FireRed & LeafGreen
  • Gen IIIEEmerald box art
    Emerald
  • Gen IVPtPlatinum box art
    Platinum
  • Gen IVHGSS
    HeartGold & SoulSilver box artHeartGold & SoulSilver box art
    HeartGold & SoulSilver
  • Gen IVDP
    Diamond & Pearl box artDiamond & Pearl box art
    Diamond & Pearl
  • Gen VBW
    Black & White box artBlack & White box art
    Black & White
  • Gen VB2W2
    Black 2 & White 2 box artBlack 2 & White 2 box art
    Black 2 & White 2
  • Gen VIXY
    X & Y box artX & Y box art
    X & Y
  • Gen VIORAS
    Omega Ruby & Alpha Sapphire box artOmega Ruby & Alpha Sapphire box art
    Omega Ruby & Alpha Sapphire
  • Gen VIIUSUM
    Ultra Sun & Ultra Moon box artUltra Sun & Ultra Moon box art
    Ultra Sun & Ultra Moon
  • Gen VIISM
    Sun & Moon box artSun & Moon box art
    Sun & Moon
  • Gen VIILGPE
    Let's Go Pikachu & Eevee box artLet's Go Pikachu & Eevee box art
    Let's Go Pikachu & Eevee
  • Gen VIIISwSh
    DebutGigantamax
    Sword & Shield box artSword & Shield box art
    Sword & Shield
  • Gen VIIIPLALegends: Arceus box art
    Legends: Arceus
  • Gen VIIIBDSP
    Brilliant Diamond & Shining Pearl box artBrilliant Diamond & Shining Pearl box art
    Brilliant Diamond & Shining Pearl
  • Gen IXSV
    Scarlet & Violet box artScarlet & Violet box art
    Scarlet & Violet
  • Gen IXLZALegends: Z-A box art
    Legends: Z-A