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[[File:Type Poison.gif|link=Poison type]]  
Species Sludge Pokémon
Abilities Stench
Sticky Hold
Poison Touch (Dream World)
None ← 089 → None
Kanto N/A Johto N/A
Hoenn N/A Sinnoh N/A
Unova N/A Kalos N/A
Evolves from [[Grimer]]
Evolves into None
ベトベトン Betobeton'
[[Generation I]]
Evolutionary line
No evolution line
Weight Height
Pokédex color Egg group
<font color=Purple>Purple</font>
Shape Footprint

Muk (Japanese: ベトベトン Betobeton) is a Poison-type Pokémon introduced in Generation I.


Muk is a large purple mass of sludge, toxic fluids, and other filthy materials. It has two large arms that capture prey and its eyes are barely visible through the sludge.

Special abilities

Muk can have the ability Stench or the ability Sticky Hold. Stench decreases the chances of encountering a wild Pokémon when Muk is the first party Pokémon. Sticky Hold prevents the theft of Muk's held item. A toxic fluid seeps from its body, which can instantly kill plants or trees on contact. Muk has one of the highest attack points of all Poison-type Pokémon, losing only to Toxicroak.

In the anime

File:Ash's Muk.jpg

In the anime, Ash has a Muk after he caught it to restore the power of a town. He later used it to battle a Bellsprout used by a trainer called Jeanette and was able to beat it thanks to Muk being able to absorb all of Bellsprout's attacks, finally finishing it with a Body Slam.


Muk is the evolved form of Grimer, evolving at level 38.

Game info

Game locations

Version(s) Area(s) Rarity
Red/Blue Pokémon Mansion Rare (Red) Uncommon (Blue)
Yellow Pokémon Mansion, Power Plant Uncommon
Gold/Silver Celadon City, Route 16-18 Rare
Crystal Celadon City, Route 16-18 Rare
Ruby/Sapphire Evolve Grimer None
Emerald Evolve Grimer None
FireRed/LeafGreen Evolve Grimer (FireRed), Pokémon Mansion (LeafGreen) None (FireRed) Rare (LeafGreen)
Diamond/Pearl Evolve Grimer None
Platinum Evolve Grimer None
HeartGold/SoulSilver Celadon City, Route 16-18 Rare
Black/White Poké Transfer, Dream World None

Pokédex entries



  • Muk has the shortest name off all Pokémon, tied with Mew.
  • Muk and Garbodor are based on imagined fears that heavy pollution, caused by the leakage and improper disposal of radioactive waste, may result in the creation of new and undesirable lives.


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