As long as Muk ex is your Active Pokémon, ignore all Poké-Powers and Poké-Bodies other than Toxic Gas.
Attacks
10Poison Breath
The Defending Pokémon is now Poisoned.
40+Slimy Water
Does 40 damage plus 10 more damage for each Colorless Energy in the Defending Pokémon's Retreat Cost (after applying effects to the Retreat Cost).
How much is Muk ex #96/97 worth?
As of November 5, 2026, Muk ex #96/97 from Dragon sells for around $122.00 in raw, ungraded condition.
Grading changes the math on this one: a PSA 10 is valued around $6,500.00, roughly 53.3x the raw price, while a PSA 9 sits near $565.28. 989 copies have been graded to date, and 10% of them came back a 10 — worth knowing before you pay grading fees.
These figures come from nightly market-data syncs verified against completed sales. Use the chart above to see the trend before you buy or sell.