Kid Boya appears exclusively in the cast credits for the 1967 anime film adaptation of *Hyokkori Hyōtan-jima*, with Toshiko Fujita as the voice actor. The character receives no mention in plot summaries, production details, or availability information for this film. Subsequent adaptations like the 2014 TV anime series, along with related media including video games, merchandise, and the original puppet show, also omit Kid Boya entirely. No details about the character's background, role, personality, or development emerge from any documented sources.