As often as you like during your turn, you may move an Energy card attached to 1 of your Pokémon to Dragonite ex. This power can't be used if Dragonite ex is affected by a Special Condition.
Attacks
70Dragon Wave
Discard a Water Energy card and a Lightning Energy card attached to Dragonite ex.
120Giant Tail
Flip a coin. If tails, this attack does nothing.
How much is Dragonite ex #90/97 worth?
Dragonite ex #90/97 is a Rare Holo EX card from Dragon (2003) — today it trades at roughly $233.20 ungraded.
Grading changes the math on this one: a PSA 10 is valued around $23,936.74, roughly 102.6x the raw price, while a PSA 9 sits near $7,250.00. 2,715 copies have been graded to date, and 5% 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.