Mega Evolution—Delta Reign Prerelease Events Begin October 24
Get an early look at the new expansion with Build & Battle Boxes.
Trainers can experience the Mega Evolution—Delta Reign expansion ahead of its official November 6 release. Starting October 24, 2026, select Play! Pokémon Stores will offer Build & Battle Boxes to facilitate Prerelease events.
The Prerelease format utilizes 40-card decks and four Prize cards. Each Build & Battle Box provides the necessary components for play, including four booster packs, a ready-to-play 40-card deck, and one of four unique foil promo cards: Masquerain, Magmortar, Enamorus, or Kommo-o.
These promo cards offer distinct strategic paths. Players may encounter Masquerain for Bug Out strategies, Magmortar for energy acceleration, Enamorus for energy cost reduction, or Kommo-o for Dragon-type energy attachment.
Atlas Division editorial summary of the official announcement.