WonDerSwan v1.1 is a WonderSwan emulator for the Nintendo DS. The WonderSwan is a Japanese handheld game console released by Bandai in 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. It was later replaced by the WonderSwan Color. Changes in this release include:

- Added GBFS ROM Loading
– Minor speed boost