Thwackey is meant to evolve into Rillaboom . At 420 BST, the stats aren't there for competitive play yet. Pre-evolution Pokemon rarely hold up against fully evolved threats.

What is Thwackey weak to?

Watch for Arcanine (Fire), Walrein (Ice), and Roserade (Poison) when using Thwackey. They all hit it super-effectively with STAB. Flying and Bug-type attackers are also a problem. With 5 weakness types, most competitive teams carry at least one counter.

What is the best ability for Thwackey?

Overgrow strengthens grass moves to inflict 1.5× damage at 1/3 max HP or less. That's the one you want on Thwackey. Grassy Surge is the hidden ability. Niche, but it has its uses.

What role does Thwackey play in battle?

Base 80 Speed is workable. Faster than some, slower than many. On offense, Thwackey is a physical attacker with base 85 Attack. Defensively? Enough bulk to take a hit or two.

Should I use Thwackey?

You can run Thwackey through the first few routes without issues. 420 BST won't carry you far though. Get it to Rillaboom as fast as you can.

Thwackey - Weakness, Evolution, Moveset, EVs & Stats

Physical

Balanced

CTier

80Speed · Above Avg

Thwackey Best Moveset

85 Attack at 80 Speed on Grass with AbilityGrassy Surge setting Grassy Terrain. Held ItemEviolite adds bulk since Rillaboom exists. The moveset has decent physical output on Grassy Terrain where Grassy Glide gets priority. One evolution from S-Tier. C-Tier in its own right through Grassy Surge and Eviolite.

●Gen VIII — Sword & Shield / BDSPE

Grass pre-evolution in Gen VIII (Sword & Shield). 85 Attack and 80 Speed. Grassy Surge later for Rillaboom.

Gigantamax became availableDynamax became available

SRCMOVETYPECATPWRPOPROLE

TM56

U-turn

Bug70POPULARCoverage

Tutor

Grassy Glide

Grass55POPULARSTAB

Lv 1

Taunt

Dark—COMMONUtility

Lv 24

Knock Off

Dark65COMMONCoverage

Lv 42

Wood Hammer

Grass120RARESTAB

Thwackey Sword & Shield Moves Thwackey BDSP Moves

Experimental

Physical Sweeper

EVs

Atk

SpD

Spe

Physical Sweeper Moveset

U Turn
Grassy GlideSTAB
TauntUtility
Knock Off

Recommended Teammates

SceptileGood

EspeonGood

WeezingGood

★Gen IX — Scarlet & Violet / Legends Z-AC

Rose in Gen IX (Scarlet & Violet). Eviolite and Knock Off support. Two gens as the Rillaboom waiting room.

Terastallization became available

Best Moves

SRCMOVETYPECATPWRPOPROLE

TM194

Grassy Glide

Grass55COMMONSTAB

Lv 24

Knock Off

Dark65COMMONCoverage

TM60

U-turn

Bug70COMMONCoverage

Lv 1

Taunt

Dark—COMMONUtility

Thwackey Scarlet & Violet Moves Thwackey Legends Z-A Moves

Best Build

Experimental

Physical Tank

Thwackey best EVs are HP and Attack

EVs

Atk

Spe

Physical Tank Moveset

Grassy GlideSTAB
Knock Off
U Turn
TauntUtility

Recommended Teammates

ManaphyGood

Arcanine-HisuiGood

SkeledirgeDecent

Thwackey Weakness

Thwackey's Grass typing leaves it vulnerable to Fire, Ice, Poison, Flying, and Bug. 4 resistances help offset the weaknesses. 5 weaknesses means you'll want teammates that can handle the coverage gaps.

Thwackey Weakness and Resistance Chart
Damage	Types
2x (Weak)	Fire, Ice, Poison, Flying, Bug
0.5x (Resist)	Water, Electric, Grass, Ground

What is Thwackey Weak Against

Fragile

5Weak

4Resist

0Immune

Score-6

4xCritical

None

2xWeak

Fire Ice Poison Flying Bug

½xResist

Water Electric Grass Ground

¼xResist

None

0xImmune

None

What is Thwackey Strong Against

3Strong

7Resisted

0Immune

Score-4

2xStrong

Water Ground Rock

½xResisted

Fire Grass Poison Flying Bug Dragon Steel

0xImmune

None

Best Pokemon Against Thwackey

Arcanine can KO Thwackey with Flare Blitz (91-107%). Staraptor deals 49-57% with Double-Edge.

Arcanine Fire	B
Recommended Build AbilityIntimidate ItemLeftovers NatureJolly Moves Extreme Speed Flare Blitz Morning Sun Will O Wisp Damage vs Thwackey Extreme Speed 20-24% Flare Blitz 2x 91-107%KO View Arcanine builds →
Baxcalibur DragonIce	B
Recommended Build AbilityThermalexchange ItemLoaded Dice NatureAdamant Moves Dragon Dance Dragon Dance Glaive Rush Icicle Spear Damage vs Thwackey Icicle Spear 2x 26-31% View Baxcalibur builds →
Staraptor NormalFlying	B
Recommended Build AbilityReckless ItemChoice Scarf NatureJolly Moves Brave Bird Close Combat U Turn Double Edge Damage vs Thwackey Close Combat 32-38% U Turn 2x 38-45% Double Edge 49-57% View Staraptor builds →
Skarmory	C
Recommended Build AbilitySturdy ItemRocky Helmet NatureBold Moves RoostRecovery SpikesHazard Body Press Iron Defense View Skarmory builds →
Nidoking PoisonGround	C
Recommended Build AbilitySheerforce ItemLife Orb NatureTimid Moves Earth Power Sludge Wave Ice Beam Flamethrower Damage vs Thwackey Ice Beam 2x 56-66% Flamethrower 2x 56-66% View Nidoking builds →

Evolution

Partway through Grookey's chain. Thwackey still has another evolution ahead before reaching Rillaboom. For breeding, average hatch time with a massive partner pool via two egg groups. So far, HP got the biggest boost (+20 from Grookey). The final form adds another 110 stats on top. View every chain in the Evolution Chart.

How to Evolve

3 Forms

#810Grookey

Level 16

#811Thwackey

Level 35

#812Rillaboom

Stat Comparison 3 Stages

Grookey

Grass

Thwackey

Grass

Rillaboom

Grass

70+20

100+30

ATK

85+20

125+40

DEF

70+20

90+20

SP.ATK

55+15

60+5

SP.DEF

60+20

70+10

SPE

80+15

85+5

BST

310C-Tier

420C-Tier+110

530A-Tier+110

ROLE

Balanced

Wallbreaker

TYPE

Physical

Breeding

Easy

Breed with Thwackey to get Grookey eggs easily using 278 partners from the Ground and Plant egg groups.

Egg Groups

Field Grass

Gender

♂87.5%♀12.5%

Hatch Time

20 cycles·5,140 steps

Quick~5 min with Flame Body

Breed With (best first)

How to Get Thwackey

You're catching Grookey first, not Thwackey. Grookey appears at moderate rates in the encounters below. The step cards map the full 3-stage chain with evolution methods between each stage.

How to Obtain Thwackey in SV

Step 1Catch Grookey
Coastal Biome
Lv.50-80Overworld
Train until Level 16 to evolve into Thwackey
Step 2Thwackey ✓
BREEDING
Available
Leave Rillaboom with a compatible partner at the Pokemon Day Care to receive a Thwackey egg.
Train until Level 35 to evolve into Rillaboom
Step 3Evolve into Rillaboom

Base Stats

Attack and Speed carry most of Thwackey's stat budget. Sp. Atk's the obvious dump stat. Tough to catch and yields 2 Attack EVs. Follows a 1.06M XP medium-slow curve.

Base Stats

Above

HP70

Attack85

Defense70

Sp. Atk55

Sp. Def60

Speed80

Total420

Details

Catch Rate

Challenging45 / 255

Growth Rate

Medium Slow1.06M XP

Height0.7 m

Weight14.0 kg

Base XP147

Abilities

Overgrow

Strengthens grass moves to inflict 1.5× damage at 1/3 max HP or less.

Grassy SurgeHidden Ability

When this Pokémon enters battle, it changes the terrain to Grassy Terrain.

EV Yield

HPAtk+2DefSpASpDSpe

Attack training target

Pokedex Entry

When it’s drumming out rapid beats in battle, it gets so caught up in the rhythm that it won’t even notice that it’s already knocked out its opponent.

Pokemon Shield

Thwackey Guide

Thwackey is meant to evolve into Rillaboom. At 420 BST, the stats aren't there for competitive play yet. Pre-evolution Pokemon rarely hold up against fully evolved threats.
Watch for Arcanine (Fire), Walrein (Ice), and Roserade (Poison) when using Thwackey. They all hit it super-effectively with STAB. Flying and Bug-type attackers are also a problem. With 5 weakness types, most competitive teams carry at least one counter.
Overgrow strengthens grass moves to inflict 1.5× damage at 1/3 max HP or less. That's the one you want on Thwackey. Grassy Surge is the hidden ability. Niche, but it has its uses.
Base 80 Speed is workable. Faster than some, slower than many. On offense, Thwackey is a physical attacker with base 85 Attack. Defensively? Enough bulk to take a hit or two.
You can run Thwackey through the first few routes without issues. 420 BST won't carry you far though. Get it to Rillaboom as fast as you can.

Game Availability

Thwackey joined the series in Sword & Shield and has been available in 2 titles so far. With 3 generations of appearances, it's established itself despite the later start.

Click a game to view version-specific details

Settings

Thwackey

Thwackey Best Moveset

Best Moves

Best Build

Thwackey Weakness

What is Thwackey Weak Against

Best Pokemon Against Thwackey

Evolution

How to Evolve

Breeding

How to Get Thwackey

How to Obtain Thwackey in SV

How to Obtain Thwackey in SwSh

Base Stats