As a Poison-type, Muk fills a straightforward role. Only weak to Ground, Psychic, and Bug. 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.
Thickly covered with a filthy, vile sludge. It is so toxic, even its footprints contain poison.
Muk Weakness
VulnerableGround, Psychic, and Bug-type moves hit Muk for super-effective damage. Muk's special bulk (base 100 Sp.Def) helps absorb special-type weaknesses, though physical moves exploit the lower Defense.
- Only 15 types exist — Dark, Steel, and Fairy are absent
- Ghost has no effect on Psychic (a known bug, fixed in Gen II)
- Special stat governs both offense and defense — no Sp.Atk / Sp.Def split
You get Muk from Grimer at level 38. This Poison-type hits 500 total stats and can't produce eggs. The evolution from Grimer pushed Muk to 500 total stats. Sp.Def saw the largest single gain at +50.
How to Evolve
The recommended build leans into Muk's strengths as an attacker. An item provides extra utility, and flexible EVs EVs back that up. An ability rounds out the package.
Best Build
Best Muk Moveset
- Explosion
- Acid Armor
- Sludge
- Body Slam
Recommended Teammates
The level-up pool is slim, so TMs matter here. Muk's Normal and Fire coverage and more all comes from technical machines, built on top of Sludge for same-type damage. Explosion and Fire Blast are the payoff moves.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
decent spawn rates across 8 locations for Muk in late-game routes. Scroll the sorted list below and pick whichever spot sits closest to your current route. The rate differences between locations are worth comparing.
Where To Catch Muk in Red & Blue
The path to Muk starts with Grimer at Lv. 30-42 via walking encounters. 2 catchable stages total, with locations listed for each one below.
Step 1Catch GrimerEFFORTLESSPokémon Mansion - 1FBlueGrassLv.30-32CommonMidBuildingEFFORTLESSPokémon Mansion - 2FBlueGrassLv.30-34CommonMidBuildingCHALLENGINGPokémon Mansion - 1FRedGrassLv.30RareMidBuildingCHALLENGINGPokémon Mansion - 2FRedGrassLv.30RareMidBuildingEFFORTLESSPokémon Mansion - B1FBlueGrassLv.31-33CommonLateBuildingEFFORTLESSPokémon Mansion - 3FBlueGrassLv.31-35CommonLateBuildingCHALLENGINGPokémon Mansion - 3FRedGrassLv.34RareLateBuildingCHALLENGINGPokémon Mansion - B1FRedGrassLv.35RareLateBuilding
Step 2Muk ✓EASYPokémon Mansion - 3FBlueGrassLv.38-40UncommonLateBuildingEASYPokémon Mansion - B1FBlueGrassLv.40UncommonLateBuildingCHALLENGINGPokémon Mansion - 1FBlueGrassLv.37RareLateBuildingCHALLENGINGPokémon Mansion - 2FRedGrassLv.37RareLateBuildingCHALLENGINGPokémon Mansion - 1FRedGrassLv.39RareLateBuildingCHALLENGINGPokémon Mansion - 2FBlueGrassLv.39RareLateBuildingCHALLENGINGPokémon Mansion - B1FRedGrassLv.42RareLateBuildingCHALLENGINGPokémon Mansion - 3FRedGrassLv.42RareLateBuildingor 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.
Muk is a mixed attacker — base 105 Attack and 65 Sp. Atk. 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