Card pricesHS—Undaunted
Muk 31/90 — HS—Undaunted
Muk is card 31/90 from HS—Undaunted (HeartGold & SoulSilver, 2010), a Uncommon Pokémon card illustrated by Midori Harada.
Muk price
Prices: TCGplayer market (US, $) and Cardmarket trend (EU, €) via TCGdex open data, each shown with the date it was last updated. Indicative only — UK sold prices on eBay are often the best guide.
Card details
- Set
- HS—Undaunted
- Number
- 31/90
- Rarity
- Uncommon
- Card type
- Pokémon · Stage 1
- Energy type
- Psychic
- Illustrator
- Midori Harada
- Released
- 18 August 2010
About this card
Muk 31/90 is card 31 in HS—Undaunted (90 numbered cards, plus 1 secret rares). It's one of 26 Uncommon cards in the set — 29% of 91. There are 16 English cards named “Muk”. This is the 9th; the first was in Fossil (1999). It has 100 HP and evolves from Grimer. Midori Harada illustrated 5 cards in HS—Undaunted and 353 English cards in total.
It isn't legal in the 2026–27 Standard format, so demand comes mainly from collectors.
More: full HS—Undaunted list
Is Muk 31/90 worth anything?
Copies of this card currently trade at around €0.27 on Cardmarket, assuming near-mint condition. The price you'll get in the UK depends mostly on condition: check the corners, edges and surface, and whether the artwork is well centred. Damaged cards sell for much less, while professionally graded copies in top condition can sell for far more.
To be sure you have the right card, match the set symbol and the number 31/90 printed at the bottom of your card. There are 32 different Muk cards, so the number matters. Then compare completed eBay UK listings — sold prices, not asking prices — for copies in similar condition.
Other Muk cards
| No. | Card | Rarity | Price | Collection |
|---|---|---|---|---|
| 124/182 | Team Rocket's Muk Destined Rivals · 2025 | Uncommon | — | |
| 89/165 | Muk Scarlet & Violet 151 · 2023 | Uncommon | — | |
| 127/198 | Muk Scarlet & Violet · 2023 | Uncommon | — | |
| 85/172 | Muk Brilliant Stars · 2022 | Rare | — | |
| 101/189 | Muk Darkness Ablaze · 2020 | Rare | — | |
| 131/236 | Alolan Muk Cosmic Eclipse · 2019 | Rare | — | |
| 220/214 | Muk & Alolan Muk-GX Unbroken Bonds · 2019 | Rare Rainbow | — | |
| 197/214 | Muk & Alolan Muk-GX Unbroken Bonds · 2019 | Rare Ultra | — | |
| 196/214 | Muk & Alolan Muk-GX Unbroken Bonds · 2019 | Rare Ultra | — | |
| 61/214 | Muk & Alolan Muk-GX Unbroken Bonds · 2019 | Rare Holo GX | — | |
| 84/181 | Alolan Muk Team Up · 2019 | Rare | — | |
| 63/181 | Muk Team Up · 2019 | Rare | — |
Questions people ask
What set is Muk 31/90 from?
HS—Undaunted, released 18 August 2010 in the HeartGold & SoulSilver series. Look for the set symbol next to the number 31/90.
How rare is Muk 31/90?
It's an Uncommon — one of 26 cards at that rarity in HS—Undaunted.
Who illustrated Muk 31/90?
Midori Harada, who has 353 English Pokémon cards credited.
Is Muk 31/90 legal in Standard?
No, not in the 2026–27 Standard format. It can still be played in Expanded if legal there, or casually.
How many Muk cards are there?
16 in English, from Fossil (1999) to Scarlet & Violet 151 (2023).
Data checked · How we build our guides