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 Forbidden Light expansion are Pheromosa, Xurkitree, Malamar, and Lycanroc, with each containing a group of Pokémon cards that are focused around their respective types: Grass-type, Lightning-type, Psychic-type, and Fighting-type.