In Ruby & Sapphire, Muk works as a tank with 500 BST behind it. C-Tier on our list: a niche pick in Ruby & Sapphire's meta. Sludge Bomb with Leftovers is the standard set.

In Ruby & Sapphire, watch for Rhydon (Ground) and Alakazam (Psychic) when using Muk. They all hit it super-effectively with STAB. Only 2 weaknesses means fewer dedicated counters to worry about.

What is the best ability for Muk?

Stench has a 10% chance of making target Pokémon flinch with each hit. That's the one you want on Muk. Poison Touch is the hidden ability. Niche, but it has its uses. Sticky Hold works too if your team needs something different.

What role does Muk play in battle?

Muk is a physical attacker with base 105 Attack. Tanky enough to absorb a few hits, too. Speed tells the real story. Base 50 Speed is low. Priority moves or Trick Room are the way to go. Fits the tank role.

For Ruby & Sapphire, Muk has answers, but so do you. Status moves (Toxic, Will-O-Wisp) wear it down. Setup sweepers can use it as a boost opportunity. Special attackers bypass its physical bulk.

Muk - Weakness, Evolution, Moveset, EVs & Stats

Physical

Tank

CTier

50Speed · Slow

Stats & Training

Muk's built to absorb hits, not race for knockouts. Special bulk with HP doing the heavy lifting. And the medium-fast 1M XP curve means it won't take forever to bring up, worth 2 HP and Attack EVs.

Base Stats

High

HP105

Attack105

Defense75

Sp. Atk65

Sp. Def100

Speed50

Total500

Details

Catch Rate

Challenging75 / 255

Growth Rate

Medium Fast1M XP

Height1.2 m

Weight30.0 kg

Base XP175

Abilities

StenchRare

Has a 10% chance of making target Pokémon flinch with each hit.

Sticky HoldTop Pick

Prevents a held item from being removed by other Pokémon.

Poison TouchHANot in game

Has a 30% chance of poisoning target Pokémon upon contact.

EV Yield

HP+1Atk+1DefSpASpDSpe

HP training target

Pokedex Entries

From MUK’s body seeps a foul fluid that gives off a nose-bendingly horrible stench. Just one drop of this POKéMON’s body fluid can turn a pool stagnant and rancid.

Muk Weakness

Ground and Psychic moves hit Muk for super-effective damage. The Poison typing picks up 4 resistances to work with. Muk's special bulk (base 100 Sp.Def) helps absorb special-type weaknesses, though physical moves exploit the lower Defense.

Muk Weakness and Resistance Chart
Damage	Types
2x (Weak)	Ground, Psychic
0.5x (Resist)	Grass, Fighting, Poison, Bug

Type ChartAvg

2Weak

4Resist

0Immune

Score0

Gen III Type Chart

Dark and Steel types added — Fairy does not exist yet
Moves are Physical or Special based on type, not per move

4xCritical

None

2xWeak

Ground Psychic

½xResist

Grass Fighting Poison Bug

¼xResist

None

0xImmune

None

STAB (1)

Grass

How to Beat Muk in Ruby & Sapphire (Best Counters)

In Ruby & Sapphire, Claydol's Earthquake hits Muk for 71-84%.

Starmie WaterPsychic	A
Recommended Build AbilityNatural Cure ItemLeftovers NatureTimid Moves Rapid Spin Ice Beam Thunderbolt SurfSTAB Damage vs Muk Rapid Spin 8-9% Ice Beam 20-23% Thunderbolt 20-23% Surf 30-35% View Starmie builds →
Claydol GroundPsychic	A
Recommended Build AbilityLevitate ItemLeftovers NatureAdamant Moves Rapid Spin EarthquakeSTAB Explosion PsychicSTAB Damage vs Muk Rapid Spin 12-14% Earthquake 2x 71-84% Explosion 59-69% Psychic 2x 33-39% View Claydol builds →

Ruby & Sapphire Evolution

Muk is what Grimer becomes. Breed it for Grimer eggs (average hatch time). A decent partner pool for breeding via one egg group. Eggs are average hatch time. The evolution from Grimer pushed Muk to 500 total stats. Sp.Def saw the largest single gain at +50. View every chain in the Evolution Chart.

How to Evolve

2 Forms

#088Grimer

Level 38

#089Muk

Stat Comparison 2 Stages

Grimer

Poison

Muk

Poison

105+25

ATK

105+25

DEF

75+25

SP.ATK

65+25

SP.DEF

100+50

SPE

50+25

BST

325C-Tier

500B-Tier+175

ROLE

Trick Room

Tank

TYPE

Physical

Breeding

Very Easy

Breed with Muk to get Grimer eggs easily using 22 partners from the Indeterminate egg group. Notable egg moves include Curse, Explosion, Haze and 4 more.

Egg Groups

Indeterminate

Gender

♂50.0%♀50.0%

Hatch Time

20 cycles·5,140 steps

Quick~5 min with Flame Body

Egg Moves

7moves

Breed With (best first)

Ruby & Sapphire Muk Best Moveset

Stickyhold helps Muk stick around while dealing real damage. Leftovers for passive recovery each turn, max HP and Attack EVs for the right balance, and Sludge Bomb as the main threat. Not the fastest, but it doesn't need to be.

Best Build

Solid pick

Physical Tank

Ability

Sticky Hold

Item

LeftoversSUSTAIN

Best Nature for Muk

Adamant+ATK

Muk best EVs are HP and Attack

EVs

Atk

SpD

Physical Tank Moveset

Sludge BombSTAB
ExplosionCoverage
CurseSetup
Focus Punch

Recommended Teammates

MetagrossDecent

SwampertDecent

SnorlaxDecent

Moves

Don't skip the egg moves. Muk picks up Curse and Explosion only through breeding, and both fill gaps the natural movepool can't. STAB runs through Sludge Bomb and Sludge while coverage across 9 types adds range.

Level-Up Moves

Lv 1

Harden

D——30Normal

Lv 1

Poison Gas

——5540Poison

Lv 1

Pound

—4010035Normal

Lv 4

Harden

D——30Normal

Lv 8

Disable

——5520Normal

Lv 13

Sludge

—6510020Poison

Lv 19

Minimize

———20Normal

Lv 26

Screech

D—8540Normal

Lv 34

Acid Armor

———40Poison

Lv 47

Sludge Bomb

S9010010Poison

Lv 61

Memento

D—10010Dark

TM Moves

TM45

Attract

——10015Normal

TM31

Brick Break

B7510015Fighting

TM28

Dig

—6010010Ground

TM32

Double Team

———15Normal

TM42

Facade

C7010020Normal

TM38

Fire Blast

C120855Fire

TM35

Flamethrower

D9510015Fire

TM01

Focus Punch-3

A15010020Fighting

TM21

Frustration

——10020Normal

TM19

Giga Drain

D751005Grass

TM10

Hidden Power

—6010015Normal

TM15

Hyper Beam

C150905Normal

TM17

Protect+4

C——10Normal

TM18

Rain Dance

C——5Water

TM44

Rest

C——10Psychic

TM27

Return

D—10020Normal

HM06

Rock Smash

—2010015Fighting

TM39

Rock Tomb

—609510Rock

TM43

Secret Power

—7010020Normal

TM34

Shock Wave

—60—20Electric

TM36

Sludge Bomb

S9010010Poison

HM04

Strength

—8010015Normal

TM11

Sunny Day

C——5Fire

TM12

Taunt

C—10020Dark

TM46

Thief

C6010025Dark

TM25

Thunder

D1207010Electric

TM24

Thunderbolt

D9510015Electric

TM41

Torment

D—10015Dark

TM06

Toxic

C—8510Poison

Egg Moves

Egg

Curse

A——10Ghost

Egg

Explosion

S2501005Normal

Egg

Haze

D——30Ice

Egg

Imprison

———10Psychic

Egg

Lick

D2010030Ghost

Egg

Mean Look

D——5Normal

Egg

Shadow Punch

—60—20Ghost

Tutor Moves

Muk can't learn any Tutor moves

How to Get Muk in Ruby & Sapphire

Can't catch Muk directly. Start with Grimer at decent rates from the locations below, then evolve at level 38. The 2-stage line from Grimer to Muk is where the leveling time goes.

How to Obtain Muk in Ruby & Sapphire

Step 1Catch Grimer
Fiery Path
SapphireGrass Lv.15-16 Volcano
25%Early
Fiery Path
RubyGrass Lv.14 Volcano
2%Early
Train until Level 38
Step 2Muk ✓

Muk Guide

In Ruby & Sapphire, Muk works as a tank with 500 BST behind it. C-Tier on our list: a niche pick in Ruby & Sapphire's meta. Sludge Bomb with Leftovers is the standard set.
In Ruby & Sapphire, watch for Rhydon (Ground) and Alakazam (Psychic) when using Muk. They all hit it super-effectively with STAB. Only 2 weaknesses means fewer dedicated counters to worry about.
Stench has a 10% chance of making target Pokémon flinch with each hit. That's the one you want on Muk. Poison Touch is the hidden ability. Niche, but it has its uses. Sticky Hold works too if your team needs something different.
Muk is a physical attacker with base 105 Attack. Tanky enough to absorb a few hits, too. Speed tells the real story. Base 50 Speed is low. Priority moves or Trick Room are the way to go. Fits the tank role.
For Ruby & Sapphire, Muk has answers, but so do you. Status moves (Toxic, Will-O-Wisp) wear it down. Setup sweepers can use it as a boost opportunity. Special attackers bypass its physical bulk.

Game Availability

Available since Red & Blue, Muk appears in 19 games spanning 10 generations. Beyond its original form, it gained an Alolan form in Generation 7.

Click a game to view version-specific details

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