To get the Pokemon TCG Pocket Mew card, as mentioned above, you need to complete the Kanto Pokedex, which means getting at least one of every of the original 150 Pokemon in the game. Once you do so, an option will come up in your "missions" tab to complete the quest and reward you with the Mew card itself, like any other mission reward.

Despite the non-answer from the devs and Pokémon Company, you can find people who have dug into the code and looked at how Pokémon Trading Card Game Pocket actually works and according to their findings, the pack you pick doesn’t matter. So why won’t The Pokémon Company say that?

Find out how to get the secret Pokémon TCG Pocket Mew card in Game Freak’s mobile app, and complete your collection of the original 151.