Pokémon Celebrations marked the trading card game's 25th anniversary in 2021 with a nostalgic collection of reprinted classics alongside new artwork. Released during peak pandemic-era collecting, it captured the hobby's explosive resurgence and offered both newcomers and veterans an accessible entry point to iconic cards from across Pokémon TCG history. Mewtwo EX represents one of the set's crown jewels—a psychic powerhouse that defined competitive play in its original era. The holo treatment brings fresh appeal to this legendary Pokémon, making it a natural centerpiece for collectors drawn to the franchise's most formidable characters and the set's celebration of TCG heritage.