If your opponent has any Benched Pokémon, he or she chooses 1 of them and switches it with the Defending Pokémon. (Do the damage before switching the Pokémon.)
40Mega Drain
Remove a number of damage counters from Butterfree equal to half the damage done to the Defending Pokémon (after applying Weakness and Resistance) (rounded up to the nearest 10).
“In battle, it flaps its wings at high speed to release highly toxic dust into the air.”
How much is Butterfree #33/64 worth?
A raw copy of Butterfree #33/64 (Jungle, 1999) is worth about $1.62 right now, based on the latest market data from November 5, 2026. Across the 2 printings we track, copies run anywhere from $0.37 to $159.38 depending on the version you're holding.
Grading changes the math on this one: a PSA 10 is valued around $392.88, roughly 242.5x the raw price, while a PSA 9 sits near $35.09. 2,286 copies have been graded to date, and 18% 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.