Muk

HS—Undaunted · #31/90 · Uncommon · 2010

$0.55

Market price ▼ 1.8% (30d)

Prices as of Jul 26, 2026

Normal Reverse Holofoil

HP 100PsychicStage 1Art · Midori Harada

18graded pop

0%gem rate

7.5×PSA 10 vs raw

-60%off ATH $4.02 · Jan 2021

Printings & price history

Normal▲ 0.0% 7d$0.55

Low $0.25Mid $0.50

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Graded values

updated 2026-07-26

Grade 6 est.$1.52

Grade 5 est.$1.28

Grade 4 est.$1.06

Grade 3 est.$0.88

Grade 2 est.$0.72

Grade 1 est.$0.61

Grades 1–6 are estimates modeled from the raw price — PSA/CGC/BGS 7–10 and Ungraded are live tracked market values.

PSA 10 price history$48.11

PSA 10 chart is building — graded values are tracked nightly, a new point appears each day.

Graded population census · updated 2026-07-08

CGC18 graded · 0 gem 10

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Population data from PriceCharting, updated monthly.

Attacks

Sludge Drag

Switch the Defending Pokémon with 1 of your opponent's Benched Pokémon. The new Defending Pokémon is now Confused and Poisoned.

50+Pester

If the Defending Pokémon is affected by a Special Condition, this attack does 50 damage plus 30 more damage.

“Its body is made of a powerful poison. Touching it accidentally will cause a fever that requires bed rest.”

How much is Muk #31/90 worth?

Right now (July 27, 2026) the going rate for an ungraded Muk #31/90 from HS—Undaunted is about $0.55. Across the 2 printings we track, copies run anywhere from $0.25 to $77.70 depending on the version you're holding.

Grading changes the math on this one: a PSA 10 is valued around $48.11, roughly 87.5x the raw price, while a PSA 9 sits near $17.34. 18 copies have been graded to date, and 0% of them came back a 10 — worth knowing before you pay grading fees.

We update this valuation every night from live market data and verify it against real completed sales — see the chart above for how Muk has moved over time.

Muk