The Game Boy conversion, titled "Snow Bros. Jr.", was developed by Dual and first released in Japan by Naxat Soft on 24 May, 1991 and later in North America by Capcom on January 1992. It is single-player only and changes the story to compensate for this by having one of the titular snowmen twins be kidnapped while the other sets out to rescue him. Several other aspects of the game were changed due to the technical restrictions of the Game Boy, such as bosses that originally fought in pairs in the arcade version now fight alone and potions are now given different shape due to the lack of color display on the original Game Boy. The Game Boy version also adds an extra set of 10 levels after the 50 levels adapted from the arcade version are cleared.