Muk 31/90
Pokemon card from Undaunted · released Aug 18, 2010
Muk is an Uncommon Psychic-type Stage 1 Pokemon card, number 31/90 in Undaunted (released Aug 18, 2010), illustrated by Midori Harada. Its TCGplayer market price was ~$5.38 for the reverse holofoil finish on Oct 30, 2026. Between Oct 1 and Oct 30, 2026, its Reverse Holofoil TCGplayer market price went from ~$6.38 to ~$5.38, down 15.7%.
Prices by finish
| Finish | PriceMarket price | Low | Mid | Buy |
|---|---|---|---|---|
| Normal | ~$0.66 | ~$0.29 | ~$0.50 | CardNexuseBayBuy Normal on TCGplayer (opens in a new tab)Search eBaySearch AmazonCardNexus |
| Reverse Holofoil | ~$5.38 | ~$2.00 | ~$4.99 | CardNexuseBayBuy Reverse Holofoil on TCGplayer (opens in a new tab)Search eBaySearch AmazonCardNexus |
TCGplayer market prices per finish, as of Oct 30, 2026. A guide, not an appraisal; condition and grading change real-world value. Buy links are affiliate links.
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Sealed Undaunted products
Card details
| Set | Undaunted |
| Number | 31/90 |
| Rarity | Uncommon |
| Type | Psychic |
| HP | 100 |
| Stage | Stage 1 — evolves from Grimer |
| Artist | Midori Harada |
| Format legality | Not legal in Standard or Expanded |
| Finishes | Normal · Reverse Holofoil |
What the codes mean
- Card number31/90Card 31 of the 90 in the main Undaunted list.
- Set symbol
The small Undaunted symbol identifies the set. Cards from before Scarlet & Violet print a symbol instead of a set code. - Regulation markNo regulation mark. Cards before Sword & Shield (2020) have none.
- RarityUncommon: a black diamond.
- Illustrator“Illus. Midori Harada” names the artist who made the art.
Attacks & abilities
Sludge DragSwitch the Defending Pokémon with 1 of your opponent's Benched Pokémon. The new Defending Pokémon is now Confused and Poisoned.
Pester50+If the Defending Pokémon is affected by a Special Condition, this attack does 50 damage plus 30 more damage.
Weakness: Psychic ×2 · Retreat cost: 3
Other Muk printings
More Undaunted cards
All Muk cards · Undaunted price list
Card data via TCGdex and pokemontcg.io, updated Oct 30, 2026. Prices: TCGplayer market prices via TCGCSV, Oct 30, 2026.