Included in each Build & Battle Box is a 23-card Evolution pack that includes one of four specially stamped Prerelease cards for the expansion, as well as four booster packs. The Prerelease cards for the Unbroken Bonds expansion are Volcanion, Persian, Stakataka, and Melmetal, with each containing a group of Pokémon cards that are focused around the following types respectively: Fire-type, Water-type, Fighting-type, and Metal-type.

The Unbroken Bonds Build & Battle Boxes provided exclusive Non Holofoil versions of cards which were only released as Holofoil in Unbroken Bonds booster packs: Lucario and Red's Challenge.