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:

– You can press the shoulder buttons to go up and down 5 times.
– Put “Gameblabla’s Oswan” in the menu, just to make sure you are indeed using this emulator and not something else.
– Some minor changes.

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