There aren't any clear answers for dealing with the Pokémon TCG Pocket Cresselia ex Drop event, thanks in part to the limited capabilities of Darkness-type cards, but we do have

A new Pokemon TCG Pocket leak is shared, and it brings good news for players who still need some of the game's most coveted cards.

The Pokémon Company International says it’s “actively investigating” ways to improve the feature after players threatened to cancel their subscriptions.