Bandai's budget-priced, failed Game Boy competitor with dual D-pad/button setups and the ability to play in vertical or horizontal alignment. Rather obscure due to never being released outside Japan. Like the Game Boy, it got a color-graphics upgrade. A lot of the WonderSwan's library was ports and anime licenses, with few standout titles aside from Riviera, a Rockman EXE sidescroller and Final Fantasy ports. The best-remembered games for it are two amateur projects that won a homebrew contest, listed below.
The WonderWitch was a development kit and cartridge released by Bandai that allowed users to create their own WonderSwan games in conjunction with a PC. Judgment Silversword and Dicing Knight were made using this. Cardinal Sins, M-KAI's sequel to Judgement Silversword, was only released as a WonderWitch file through the creator's website, and there is no emulator that currently supports the WonderWitch cart. This meant that a physical WonderWitch was required to play Cardinal Sins, until a reprogrammed port of the game was included with Eschatos. The WonderWitch mascot also appears as a hidden bonus item in Eschatos.