"WonderSwan (ワンダースワン, Wandāsuwan) is a handheld game console released in Japan by Bandai on March 4, 1999. It was developed by the late Gunpei Yokoi's company Koto and Bandai. The WonderSwan was made to compete with the Neo Geo Pocket Color and the market leader Nintendo's Game Boy Color (even though the developer for the WonderSwan, Gunpei Yokoi, developed the original Nintendo Game Boy).
The WonderSwan was later replaced by the WonderSwan Color; although, some WonderSwan Color games are compatible with the original WonderSwan, many are designed exclusively for the WonderSwan Color and show a message such as "This cartridge is for WonderSwan Color only" when run on the original WonderSwan.
The WonderSwan was available in ten case colors, playable both vertically and horizontally, and features a fairly large library of games. As it was a console designed essentially for the Japanese market, most of the games are in Japanese, with only a few featuring English text.
While the Game Boy series have issues with fake copies of game cartridges, the WonderSwan is not known to have any fake copies of games. This is probably because the WonderSwan was not as popular as the Game Boy series." (Wikipedia)
Download WonderSwan No-Intro 20090728 Romset:
Download WonderSwan Color No-Intro 20090531 Romset:
Due to broken link the upload has been replaced with the latest set.