Custom Robo GX (カスタムロボGX, Kusutamu Robo JīEkkusu) is a video game title developed by NOISE and published by Nintendo for the Game Boy Advance on July 26, 2002 in Japan. However, Nintendo had considered releasing the game in North America, but never did for reasons unknown. It stayed on Nintendo Power's future release list for a few years, until the release of the next title of the series, Custom Robo: Battle Revolution for the Nintendo GameCube (known as Custom Robo in North America). NOISE was also planning to develop the sequel, Custom Robo GX 2 but later dropped from the lineup in favor of Custom Robo Arena for the Nintendo DS. Nintendo previously planned to release it in late 2005 in Japan. Custom Robo GX is the third title of the Custom Robo series as well as the last Custom Robo title never released outside of Japan.

Cyborg Kuro-chan (サイボーグクロちゃん, Saibōgu Kurochan) is a shōnen manga series created by Naoki Yokouchi, serialized in Kodansha's Comic BonBon magazine. Eleven volumes of the manga were released between 1998 and 2002. It centers on the titular character, a housecat who is kidnapped and modified by a mad scientist to be a part of a cyborg army bent on world domination. Kuro breaks his control chip, escapes and becomes a vigilante. Kuro has many allies, who help him out during instances such as urban destruction, parallel universes, outer space, and battles between other cats and cyborgs. Cyborg Kuro-chan was adapted into an anime series produced by Tokyo Movie Shinsha for TV Tokyo. The anime aired from 2 October 1999 to 6 January 2001 for 66 episodes. The manga and anime have been exported to several countries in Asia, Europe, and Africa. A large number of merchandise has been made based on the manga and anime, and two additional volumes, entitled Cyborg Kuro-chan: Extra Battle, were published. Reviews for the series note the simplistic and cartoonish art style, and a thin storyline which is mainly centered on gags and comedic violence.