Does 10 damage plus 10 more damage for each Energy card attached to the Defending Pokémon.
Barrier
Discard 1 Psychic Energy card attached to Mewtwo in order to prevent all effects of attacks, including damage, done to Mewtwo during your opponent's next turn.
“A scientist created this Pokémon after years of horrific gene-splicing and DNA engineering experiments.”
How much is Mewtwo #10/102 worth?
Right now (November 4, 2026) the going rate for an ungraded Mewtwo #10/102 from Base is about $85.99. Across the 3 printings we track, copies run anywhere from $39.05 to $1,109.48 depending on the version you're holding.
Grading changes the math on this one: a PSA 10 is valued around $5,379.98, roughly 62.6x the raw price, while a PSA 9 sits near $420.00. 6,546 copies have been graded to date, and 1% 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.