Hello Kitty World is a Japan-exclusive reskin and remake of the Game Boy game Balloon Kid that was developed for the Famicom in 1992. The game was co-published by Character Soft and Mario Co., a short-lived joint venture between Nintendo and the Japanese advertising agency Dentsu, and developed by Pax Softnica, the co-developers of the original game. Although the plot is different and some visual elements are changed, the game's mechanics, music and levels vary from being similar to nearly identical to Balloon Kid. The original game would go unreleased in Japan until the upgraded Game Boy Color port Balloon Fight GB was released in 2000.