Once during your turn (before your attack), if Dark Dragonair is your Active Pokémon, you may search your deck for an Evolution card. Show it to your opponent and put it into your hand. Shuffle your deck afterward. This power can't be used if Dark Dragonair is affected by a Special Condition.
This card's Evolutionary Light Poké-POWER is similar to the Pokémon Power of the same name possessed by the Dark Dragonair from Team Rocket. The two differ significantly, however, in that this card's power requires Dark Dragonair to be your Active Pokémon, whereas the Team Rocket version could be used from the Bench.