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 ...

If you’ve been playing Pokémon TCG Pocket since launch, you’ve probably already collected most of the cards from the game’s ...

At any rate, when you've officially collected all 150 original Pokemon, getting your Mew card ... complete a mission called "Complete the Kanto Pokedex." Doing so will grant you the Mew card ...