There aren't any clear answers for dealing with the Pokémon TCG Pocket Cresselia ex Drop event, thanks in part to the limited ...

Pokemon Pocket launches a new Drop Event, introducing five new cards to the game, including the Psychic-type Cresselia ex.

The Cresselia drop event allows Pokemon TCG Pocket players to battle for the chance to win the Legendary’s ex card and other promo ones.

You now have a better chance of getting a Pokemon Trading Card Game Pocket Cresselia ex card via a new Drop Event.