The designation specifically refers to the Dragon Ball Super Card Game: Fusion World Booster Pack [FB01] , which features cards such as the "Milky Cat" variant or related collectibles within the Fusion World series.
As Milky Cat FB-09 padded through the galaxy, she discovered hidden wonders: a rainbow-hued black hole, a comet's tail made of sparkling diamonds, and a moon that sang a gentle melody. Her heart remained full of curiosity, and her spirit stayed as light as a feather. Milky Cat FB-09