Kirby Development History, Part 1: How Twinkle Popo Became Kirby’s Dream Land, and Its Product Code DMG-KYJ
Kirby's debut came out on Game Boy in Japan on 27 April 1992 as Hoshi no Kirby (DMG-KYJ). It began as Twinkle Popo, which HAL meant to publish itself. Why Kirby was white in America, and why the code finds the Japanese cartridge before the title.