Gameblabla’s Oswan by gameblabla is a Wonderswan/Wonderswan color, based on OswanJ by bird_may_nike and Oswan by Alekmaul. It can play most, if not all Wonderswan games properly.

Release notes from gameblabla:

– I have updated my emulator and it has a new control sheme called ‘Swap everything’

http://boards.dingoonity.org/gcw-releases/gameblabla's-oswan/