Pokémon Celebrations marked the trading card game's 25th anniversary in 2021, arriving at the height of the hobby's modern renaissance. The set honored the franchise's history by reprinting classic cards alongside new artwork, creating products that appealed equally to longtime players and recent collectors rediscovering the game. The Elite Trainer Box Cosmos Holo versions became particularly sought after for their stunning alternate finishes. This Gold Star Greninja captures one of Pokémon's most beloved water-types in dynamic action. The Cosmos Holo treatment transforms the card's visual presentation, creating the dimensional shimmer collectors prize. Greninja's popularity, combined with this special promotional treatment, made it a centerpiece pull for many opening their Celebrations boxes.