Once during your turn (before your attack), you may search your deck for another Ditto and switch it with Ditto. (Any cards attached to Ditto, damage counters, Special Conditions, and effects on it are now on the new Pokémon.) If you do, put Ditto on top of your deck. Shuffle your deck afterward. You can't use more than 1 Duplicate Poké-Power each turn.
Attacks
20Psybeam
Flip a coin. If heads, the Defending Pokémon is now Confused.
How much is Ditto #12/17 worth?
As of November 4, 2026, Ditto #12/17 from POP Series 3 sells for around $82.17 in raw, ungraded condition.
Grading changes the math on this one: a PSA 10 is valued around $263.57, roughly 3.2x the raw price, while a PSA 9 sits near $122.50. 376 copies have been graded to date, and 60% 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.