Muk

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

All 68 Muk cards ranked by value →
$0.61
Market price 10.9% (30d)
Prices as of Aug 22, 2026
HP 100PsychicStage 1Art · Midori Harada
48graded pop
2%gem rate
7.6×PSA 10 vs raw
-73%off ATH $4.02 · Jan 2021
$13.36EV to grade — don't
Market data

Printings & price history

Normal 3.4% 7d$0.61
Low $0.14Mid $0.49

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Graded market

Graded values

PSA 10 report →updated 2026-08-22
Grade 6 est.$1.06
Grade 5 est.$0.90
Grade 4 est.$0.74
Grade 3 est.$0.62
Grade 2 est.$0.50
Grade 1 est.$0.43

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$48.27

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

Graded population census · updated 2026-08-01

CGC25 graded · 1 gem 10
PSA5 graded · 0 gem 10

Population data from PriceCharting, updated monthly.

More Muk cards all 68 ranked by value →

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 (August 22, 2026) the going rate for an ungraded Muk #31/90 from HS—Undaunted is about $0.61. Across the 2 printings we track, copies run anywhere from $0.14 to $77.70 depending on the version you're holding.

Grading changes the math on this one: a PSA 10 is valued around $48.27, roughly 79.1x the raw price, while a PSA 9 sits near $17.38. 25 copies have been graded to date, and 4% 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.

Collecting HS—Undaunted?Full master set guide — every card, chase list, and completion cost