Pack points in Pokémon TCG Pocket can be spent to acquire new cards, but you may not have realised they will expire if unused. At least, I hadn't clocked that myself. Pack points are earned by opening booster packs in the mobile game and can then be spent on specific cards.

Pokémon TCG Pocket's Step-Up Battles teach you how to battle and come with generous rewards. You can earn a whopping 366 Pack Hourglasses from completing the introductory missions, corresponding to 30 packs. Completing all these missions and opening the respective packs gets you well on your way to building the best decks in the game.

In Pokemon TCG Pocket, Pack Points are a card-crafting currency. You earn them passively by engaging with the game’s main card-acquisition features. These points can then be spent in an exclusive shop to purchase any non-promotional card you want—even ultra-rare ones like the Crown Rarity Pokemon.

Players are stockpiling their Pack Hourglasses in anticipation of the game's next big update, which is supposed to be here any day now

The Pokmon Trading Card Game has several booster packs, and many players don't realize they can check which cards they're missing from each pack.