Flip a coin. If heads, the Defending Pokémon is now Asleep.
Destiny Bond
Discard 1 Psychic Energy card attached to Gastly in order to use this attack. If a Pokémon Knocks Out Gastly during your opponent's next turn, Knock Out that Pokémon.
“Almost invisible, this gaseous Pokémon cloaks the target and puts it to sleep without notice.”
How much is Gastly #50/102 worth?
Right now (November 5, 2026) the going rate for an ungraded Gastly #50/102 from Base is about $0.94. Across the 3 printings we track, copies run anywhere from $0.29 to $499.99 depending on the version you're holding.
Grading changes the math on this one: a PSA 10 is valued around $215.74, roughly 229.5x the raw price, while a PSA 9 sits near $39.81. 2,787 copies have been graded to date, and 24% of them came back a 10 — worth knowing before you pay grading fees.
Prices on this page refresh nightly from live TCGplayer market data and are cross-checked against actual sold prices, so a single inflated listing never becomes "the price". The chart above has the full history.