The Deck Kit comprises two Half Decks that focus on Pokémon belonging to Team Aqua and several supporting Trainer cards. The two Half Decks can be played independently or combined to form a Full Deck, allowing varying levels of play. The Half Decks also share a collective numbering system to reflect this.
The Aqua Deck Kit also includes a rulebook, damage counters, status counters, a custom coin, and playmat.
- In the English release, the majority these cards, along with a majority of cards from the Magma Deck Kit were combined with the main expansion to form the English set.
- The non-holofoil Walrein is a Japanese exclusive, as the English version only has a Holofoil version.