As a Poison-type, Muk fills a straightforward role. Only weak to Ground and Psychic. Known as the Sludge Pokémon. Known as the Sludge Pokemon. The stat spread favors raw physical power.
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.
It is usually undetectable because it blends in with the ground. Touching it can cause terrible poisoning.
Thickly covered with a filthy, vile sludge. It is so toxic, even its footprints contain poison.
Muk Weakness
AvgGround and Psychic-type 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.
- Dark and Steel types added — Fairy does not exist yet
- Moves are Physical or Special based on type, not per move
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.
How to Evolve
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.
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
Best Muk Moveset
- Sludge Bomb
- Explosion
- Curse
- Focus Punch
Recommended Teammates
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
TM Moves
Egg Moves
Tutor Moves
moderate rates across 2 encounter spots for Muk. That's the kind of hunt where you pick one location and settle in. Sort by Best below to see where the odds are highest.
Where To Catch Muk in FireRed & LeafGreen
The path to Muk starts with Grimer at Lv. 28-40 via walking and fishing encounters. 2 catchable stages total, with locations listed for each one below.
Step 1Catch GrimerEFFORTLESSPokémon Mansion - 1F/2F/3FLeafGreenGrassLv.28-30CommonMidBuildingEFFORTLESSPokémon Mansion - B1FLeafGreenGrassLv.28-30CommonMidBuildingCHALLENGINGPokémon Mansion - 1F/2F/3FFireRedGrassLv.28RareMidBuildingCHALLENGINGPokémon Mansion - B1FFireRedGrassLv.28RareMidBuildingEXTREMECeladon CityFireRedSuper RodLv.30-40RareMidCityEXTREMECeladon CityLeafGreenSuper RodLv.30-40RareMidCity- Step 2Muk ✓CHALLENGINGPokémon Mansion - 1F/2F/3FGrassLv.32RareLateBuildingCHALLENGINGPokémon Mansion - B1FGrassLv.34RareLateBuildingor evolve from Grimer (Step 1)
Muk works as a tank with 500 BST behind it. C-Tier on our list — a situational pick that fills a niche. That 105 base HP does the heavy lifting.
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. But the speed tells the real story — base 50 Speed is low. Priority moves or Trick Room are the way to go. Fits the tank role.
Muk appears in 19 games, including Yellow, Red & Blue, and Gold & Silver.
Available since Red & Blue, Muk appears in 19 games spanning 9 generations. Beyond its original form, it gained an Alolan form in Generation 7.
- Gen IY
Yellow - Gen IRBDebut
Red & Blue - Gen IIGS
Gold & Silver - Gen IIC
Crystal - Gen IIIRS
Ruby & Sapphire - Gen IIIFRLG
FireRed & LeafGreen - Gen IIIE
Emerald - Gen IVPt
Platinum - Gen IVHGSS
HeartGold & SoulSilver - Gen IVDP
Diamond & Pearl - Gen VBW
Black & White - Gen VB2W2
Black 2 & White 2 - Gen VIXY
X & Y - Gen VIORAS
Omega Ruby & Alpha Sapphire - Gen VIIUSUM
Ultra Sun & Ultra Moon - Gen VIISMAlolan
Sun & Moon - Gen VIILGPE
Let's Go Pikachu & Eevee - Gen VIIISwSh
Sword & Shield - Gen VIIIPLA
Legends: Arceus - Gen VIIIBDSP
Brilliant Diamond & Shining Pearl - Gen IXSV
Scarlet & Violet - Gen IXLZA
Legends: Z-A