An official Pokémon Center Japan MEGA Starter Set centered on Mega Diancie-EX, the Rock/Fairy-type Mythical Pokémon (#719) from the Kalos region. This set was distributed exclusively through Japan's Pokémon Center lottery system, making it a rare, limited-release collectible unavailable through standard retail channels. An essential piece for Mega Evolution enthusiasts and serious Mythical Pokémon collectors.