The is a handheld game console released in Japan by Bandai. Developed in collaboration with Gunpei Yokoi's company Koto Laboratory, it was the final piece of hardware Yokoi worked on before his death in 1997. Launched in Japan in March 1999 during the sixth generation of video game consoles, the WonderSwan was followed by two upgraded models, the WonderSwan Color and SwanCrystal, before Bandai discontinued the line in 2003. Throughout its lifespan, no version of the WonderSwan was officially released outside Japan.
Powered by a 16-bit processor, the WonderSwan was designed as both a more powerful and affordable alternative to its 8-bit competitors, Nintendo's Game Boy Color and SNK's Neo Geo Pocket Color, while offering notably long battery life from a single AA battery. Later iterations improved the handheld’s display, introducing color for enhanced visual quality. One of its distinguishing features was its dual-orientation design, allowing gameplay in both vertical and horizontal modes. The WonderSwan also cultivated a unique library, featuring numerous first-party titles based on licensed anime properties and strong third-party support from developers such as Squaresoft, Namco, Capcom and Banpresto.
In total, all variations of the WonderSwan combined to sell an estimated 3.5 million units, capturing up to 8% of the Japanese handheld gaming market at its peak before being overshadowed by Nintendo's Game Boy Advance. In retrospect, despite its limited commercial success, the WonderSwan is often praised for its innovation and potential, as well as its brief yet noteworthy challenge to Nintendo's dominance in the handheld gaming space.
History
Founded in 1950 by Naoharu Yamashina, Bandai was originally a manufacturer of toy cars and plastic models, but became a major player in the toy industry through the licensing of popular anime characters beginning with Tetsuwan Atomu in 1963. In the 1970s, Bandai manufactured both LCD games based on television programs and dedicated consoles. In 1982, the company released the Intellivision in Japan, and in 1985 it became one of the first third-party licensees on the Family Computer. Notably, the company's greatest success in electronic games, was the Tamagotchi virtual pet first released in 1996. Despite plans for Bandai to merge with Sega to form Sega Bandai Ltd. in 1997, the merger was called off suddenly. Bandai's board of directors decided to oppose the merger less than a week after approving it, and Sega in turn decided to accept Bandai's actions at an emergency board meeting later that day. Bandai president Makoto Yamashina took responsibility for failing to gain the support of his company for the merger. As a result, Bandai entered the market without outside support.
Engineer Gunpei Yokoi is known for creating the Game Boy handheld system at Nintendo. After the failure of the Virtual Boy, he left the company in 1996 in order to create his own engineering firm, Koto Laboratory. It was then that Bandai approached Yokoi to create the WonderSwan to compete with the Game Boy.
The WonderSwan was officially unveiled in Tokyo on October 8, 1998. Bandai chose the name of the system to highlight its aesthetics and technical capabilities because the swan is recognized as an elegant bird with powerful legs that aid its graceful swimming. The company promised a 30-hour battery life, a low retail price, and a launch lineup of roughly fifty games. In 2000, Bandai signed an agreement with Mattel to bring the handheld to North America, but ultimately decided against a Western release. The launch was a moderate success, with the system selling 270,632 units in under a month after its release. Before the WonderSwan Color could be released, Nintendo announced the Game Boy Advance, which featured superior hardware. The WonderSwan Color still retailed at a lower price point at compared to the Advance at , but despite peaking at 8% of the handheld market share in Japan, the WonderSwan's sales never recovered after the Game Boy Advance reached store shelves in March 2001. less than the Game Boy Advance. Once again, Bandai held a poll on its website to determine casing colors and released the system in blue violet, wine red, crystal blue, and crystal black. Despite its low price and an improved TFT LCD screen, the SwanCrystal was unable to compete, so Bandai discontinued the WonderSwan line in 2003 due to low demand and backed out of producing video game hardware altogether. The original model's screen is capable of displaying up to 16 shades of gray (up to 8 on screen at once), in contrast to the four displayed by the WonderSwan's main competitor, the Game Boy. Similar to the Atari Lynx, the handheld has an extra set of buttons allowing the console to be played at different angles; for the WonderSwan, these buttons were used to allow gamers to play games in both the portrait and landscape orientations. The WonderSwan series are all powered by a single AA battery, with the original monochrome version having a battery life of 40 hours. Its LCD screen is and displays at a resolution of 224 × 144.
The physical measurements of the WonderSwan Color are , slightly larger than the original WonderSwan, and it weighs . Its CPU is a 3.072 MHz NEC V30 MZ, and it includes 512 kbit of RAM, which is shared between the video RAM and the work RAM. The screen on the WonderSwan Color can display up to 241 colors out of a palette of 4096, and up to 32 sprites per line. It offers backward compatibility with all previous WonderSwan titles. measuring .
Several features and accessories were developed for the WonderSwan. The WonderWitch is an official software development kit aimed at amateur programmers that was released by Qute Corporation. It sold at a cost of and allows for games to be developed in the C programming language. In addition, the handheld can be connected to a PocketStation, a memory card peripheral for the PlayStation console, through a device known as the WonderWave. the WonderSwan only picked up 8% of the marketshare in Japan and was ultimately outperformed by Nintendo's Game Boy Advance.