"Booster Sets" (ブースターパック Būsutāpakku, "Booster Pack") are packs of cards that are used to build or edit decks. Each pack contains 5 of over 105 different cards, while a display box contains 30 packs. Unlike Trial Decks, the cards contained in boosters are random and from several different Worlds.
The ratio of rarity is divided into 1 BR/ 8 RRR/ 12 RR/ 24 R/ 30 UC/ 30 C, in addition to this, 12 of them are also SP. The Buddy Rare (BR) is a unique card that also will come in the next set.
The ratio of rarity in a display box is 2 RRRs, 6 RRs and 22 Rs. If a SP card appears, it replaces 1 of the RRRs in the Japanese version instead, however it replaces 1 of the RRs in the English version instead.