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
Copy
Choose 1 of the Defending Pokémon's attacks. Copy copies that attack. This attack does nothing if Ditto doesn't have the Energy necessary to use that attack. (You must still do anything else required for that attack.) Ditto performs that attack.
How much is Ditto #38/113 worth?
Ditto #38/113 is a Uncommon card from Delta Species (2005) — today it trades at roughly $55.81 ungraded. Across the 2 printings we track, copies run anywhere from $54.99 to $2,254.88 depending on the version you're holding.
Grading changes the math on this one: a PSA 10 is valued around $543.11, roughly 9.7x the raw price, while a PSA 9 sits near $202.31. 215 copies have been graded to date, and 19% 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 Ditto has moved over time.