| Delta Reign Build & Battle Box
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The Delta Reign Build & Battle Box was released as a prelude to the Delta Reign expansion and offered people the opportunity to experience the cards before their general release on November 6, 2026. Tournaments were typically held on the weekends of October 24-25 and October 31-November 1, 2026.
Each box includes a ready-to-play 40-card deck plus four Delta Reign booster packs to potentially integrate useful cards into it. Each Delta Reign Build & Battle Box deck includes a promotional card, and an assortment of Pokémon, Trainer cards, and Energy cards themed around the promotional card. The possible promotional cards include Masquerain, Magmortar, Enamorus, and Kommo-o. Delta Reign Build & Battle Boxes were categorized as Play Level 2.
The boxes could provide exclusive Non Holofoil versions of cards only available as Holofoil in Delta Reign booster packs: Magmortar and Kommo-o. A Non Holofoil variant of Growing 
Energy from Perfect Order was also made available.
Box structure
Each box included one of the following four different decks.
