The WonderSwan is a handheld game console released exclusively in Japan by Bandai in 1999. Developed by Gunpei Yokoi's company Koto Laboratory and Bandai, the WonderSwan was powered by a 16-bit central processing unit and took advantage of a low price point and long battery life in comparison to its competition. The system featured numerous first-party titles based on licensed anime properties, as well as significant third-party support from Square, Namco, and Taito. The WonderSwan and its two later models, the WonderSwan Color and SwanCrystal, were officially supported until being discontinued in 2003, after being marginalized by Nintendo's Game Boy Advance. In all its variations, the system sold an estimated 3.5 million units.
Pictured here is the SwanCrystal, released in 2002. It had an improved color LCD screen and was available in four casing colors.Photograph: Evan Amos