Every new Pokemon TCG expansion carries a certain level of hype primarily because it's the latest product to release. However, sets like Surging Sparks stand out as special due to the contents of the product,

Pokemon TCG Pocket’s rarest cards are tough to get, here are your odds of pulling all the most sought-after cards so far.

TCG Pocket Mew card is a secret reward that many players don't even know exist in the game, but in fact it's a legendary prize for a challenge to "complete the Kanto Pokedex" that the game doesn't even tell you that you're doing.