Flip a coin. If heads, the Defending Pokémon is now Asleep.
20+Psychic
This attack does 20 damage plus 10 more damage for each Energy card attached to the Defending Pokémon.
How much is Mewtwo #56/165 worth?
A raw copy of Mewtwo #56/165 (Expedition Base Set, 2002) is worth about $99.99 right now, based on the latest market data from November 4, 2026. Across the 2 printings we track, copies run anywhere from $99.94 to $799.18 depending on the version you're holding.
Grading changes the math on this one: a PSA 10 is valued around $2,274.94, roughly 22.8x the raw price, while a PSA 9 sits near $399.98. 617 copies have been graded to date, and 23% 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 Mewtwo has moved over time.