Pokémon Mega Brave Booster Box - Japanese

1 Booster box = 30 Packs

1 Booster pack = 5 cards. 

Mega Brave and Mega Symphonia reintroduce Mega Evolution into the card game for the first time since the XY Series and Sun & Moon Series, as powerful Mega Evolution Pokémon ex cards worth 3 Prize cards, utilizing the typical stage and Pokémon Evolution of their depicted Pokémon