The answer is Pokémon cards, of course! The Pokémon TCG: Poké Ball Tin contains:

• 3 Pokémon TCG booster packs (Each Sun & Moon Series pack contains 10 cards and 1 basic Energy. Each XY Series pack contains 10 cards.)
• 1 Pokémon coin
  
• Contains Sun and Moon Base Set, XY Fates Collide, and XY Breakpoint
  Cards vary by pack. Booster pack packaging and coin varies by product.
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