Ash's Muk

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Ash's Muk
サトシのベトベトン Satoshi's Betbeton
Poké Ball
Ash Muk.png
Ash's Muk
Debuts in Sparks Fly for Magnemite
Caught at Gringey City
Gender Unknown
Ability Unknown
Current location At Professor Oak's Laboratory
This Pokémon is fully evolved.
Voice actor Japanese English
As Muk Unshō Ishizuka (EP030-SM042) Michael Haigney (EP030-AG133)
Tom Wayland (DP182-BW123)
Carter Cathcart‎‎ (SM042)

Ash's Muk (Japanese: サトシのベトベトン Satoshi's Betbeton) was the ninth Pokémon that Ash caught in the Kanto region, and his tenth overall.

In the anime


Original series

Muk in its debut

In Sparks Fly for Magnemite, Ash and his friends were traveling through Gringey City, which was in the midst of a power failure. The local power plant was being overrun by the mysterious Poison-type Pokémon Grimer. After the swarm was located, the Grimer's leader, a Muk, came and challenged the Trainers. However, the vast numbers of Magnemite and Magneton in the city combined attacks to clear out the Grimer, leaving only Muk. With the aid of Pikachu and a Magnemite that was following it due to an electrical build up, Ash defeated and captured the Muk. It was then immediately sent to Oak's lab because its stench was so rancid that it could seep through the Poké Ball. However, Muk's horrid smell seemed to have disappeared in later episodes as neither Ash, nor anyone around him, was affected by it.

Muk appeared later in Showdown at the Po-ké Corral when Ash, Misty, Brock, and Gary visited Professor Oak's Laboratory.

Muk easily absorbing attacks

Muk's first battle was in The Fourth Round Rumble, where it was selected for use in the Indigo Plateau Conference. After Jeanette Fisher's high-level Bellsprout had trounced Bulbasaur and Pikachu, Muk made a surprise appearance as Ash's third Pokémon. Muk easily absorbed Bellsprout's physical moves and Razor Leaf and then simply smothered Bellsprout with Body Slam, winning the match for Ash.

Orange Islands

Muk was briefly called in The Mystery Menace, where Ash used Muk to help him and Tracey find Misty, Togepi, and Bulbasaur, who was kidnapped by a giant Bulbasaur in a sewer. Muk and Kingler also offered to fight for Ash in the Orange Island Championship battle against Drake in Hello, Pummelo!, but Ash chose Tauros instead.

Muk asking Ash to let it fight

Muk was reunited with Ash when he returned home in A Tent Situation. Muk insisted on fighting Team Rocket, and Ash ordered it into battle instead of choosing Bulbasaur. Muk managed to resist Razor Leaf attacks from James's Victreebel, and stopped Victreebel's Poison Powder from working. Lickitung's Lick was even less effective, wiping Muk's face ineffectively to the point of causing pleasure instead of damage. It was then put to sleep by Sleep Powder, but awoke after Gary intervened and drove Team Rocket away.

Muk battling Gary's Scizor

Muk appeared in A Farfetch'd Tale, where it crowded into Ash's screen with Kingler, Tauros and Snorlax to wish him luck for his next Gym battle with Whitney.

Muk's only other major battle was when Ash called it up from Oak's Lab in Can't Beat the Heat!, along with Tauros, Snorlax and Heracross in order to fight Gary in the Silver Conference. It was sent out originally to fight Blastoise, and the two fought to a stalemate, with Muk's Sludge Bomb deflected by Rapid Spin and Blastoise's physical attacks absorbed into Muk's body. Ash pulled Muk for his Bayleef quickly after. It was sent out to fight Scizor later, who dodged a Sludge Bomb easily. Muk absorbed both Quick Attack and Metal Claw, but Scizor was able to throw Muk using the latter attack, ultimately defeating it with Swift.

Advanced Generation series

Muk made an appearance in Showdown at the Oak Corral, where it was seen crushing Cassidy, Butch, and all of the stolen Poké Balls. It was also seen crushing Tracey when he opened the door to Oak's Lab for Delia.

Muk appeared in The Right Place and the Right Mime when Ash returned to Pallet Town. It greeted Professor Birch with its usual friendliness.

Diamond & Pearl series

Muk reappeared in An Old Family Blend!, at Professor Oak's lab, and then it was transferred to Ash for a brief reunion. Muk was not seen participating in the Lily of the Valley Conference.

Best Wishes series

Muk has made brief appearances in New Places... Familiar Faces! and Farewell, Unova! Setting Sail for New Adventures!, smothering Professor Oak while Ash was calling him from Professor Juniper's laboratory.

Muk was reunited with Ash in The Dream Continues!, where it and the rest of Ash's Pokémon posed in a group photo with him.

Sun & Moon series

Muk reappeared in Alola, Kanto!, in which it was sent out of its Poké Ball so it could be compared with its Alola Form. It immediately smothered Ash upon seeing him.

Muk reappeared in SM111, joining Professor Oak in observing the data about Meltan that Rotom sent to him.

Personality and characteristics

Muk showing affection for its Trainer

Ash's Muk is an extremely happy and affectionate Pokémon. It grew an attachment in particular to Professor Oak and as a recurring gag, it would always smother the Professor whenever Ash would make a call to the lab. This was first seen twenty episodes after its capture, in Who Gets To Keep Togepi?. Muk tackled Professor Oak in excitement in Showdown at the Po-ké Corral, when Oak explained that Muk and Krabby had become just like him from its long period of living with him.

Muk loves humans and it's not too particular what kind.

Muk's affection also extends to his Trainer, second in enthusiasm only to Bayleef, despite only having fought for him on three occasions. Muk obligingly crushes Ash in excitement whenever Ash returns to the lab or summons it to his party. Its affection also extends to complete strangers, as was seen when it completely ignored Jessie's Lickitung in order to hug her, also smothering James's Victreebel in excitement. It also smothered Professor Birch upon meeting him in The Right Place and the Right Mime.

Its affection even extends to antagonists, as seen both in the aforementioned encounter with Jessie and James, and also in a special episode, Showdown at the Oak Corral, when it actually appeared sad that Totodile drove Butch and Cassidy away. As Professor Oak said to Jessie, Muk loves humans, and it is not very particular to which kind.

Muk differs from most of Ash's other Pokémon in that it is a defensive Pokémon, with a low attack power and very few moves used across its entire time on the show. It has never been shown to be damaged by a physical attack, with its opponents' moves always absorbed by its odd body type. Despite being quite powerful and good in battle, it has only ever defeated one opponent, Bellsprout (it was put to sleep by Victreebel and knocked out against Gary without a win).

Moves used

Ash Muk Body Slam.png
Using Body Slam
Move First Used In
Body Slam The Fourth Round Rumble
Sludge Bomb Can't Beat the Heat!
A shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.
  • In the English dub of A Tent Situation, Ash commanded Muk to use Poison Gas. In the original Japanese version, he simply called Muk by its name.

In the manga

Muk in The Electric Tale of Pikachu

In the Ash & Pikachu manga

Muk only appeared on the scoreboard in One Half Of A Poké Ball.

In The Electric Tale of Pikachu manga

Ash caught Muk off-screen and later used it as his last Pokémon is his battle against Jeanette in Welcome to the Big Leagues. Jeanette's Bellsprout had no chances of using its techniques against Muk's slimy body, and Ash won the battle.


  • Muk is Ash's only Pokémon in the Amorphous Egg Group.
  • The XY series is the only series in which Muk has not appeared.
  • Out of all the Pokémon that Ash has obtained in their evolved forms, Muk is the one he has owned the longest.
  • In Pokémon Yellow, a game highly based on the anime, Muk can be found while walking in the Power Plant, making a direct reference to Ash's Muk, which was also found in a power plant.

Related articles

For more information on this Pokémon's species, see Muk.

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