Tag All Stars represented a creative peak for Pokemon's Tag Team GX era, celebrating the mechanic that defined mid-generation Sun & Moon competitive play. Released in Japan in 2019, the set brought together unexpected character pairings with stunning full-art treatments, making it highly sought among collectors who appreciated both the gameplay innovation and visual artistry of that period. Blacephalon GX pairs the Ultra Necrozma storyline's chaotic deity with strategic gameplay, rendered in the vibrant, surreal style characteristic of the set's best cards. Collectors value this double rare for its dynamic composition and the character's popularity within the Pokemon mythos, representing the creative ambition that defined Tag Team GX's most memorable era.