Cas: You can click the Package Contents and it shows you which emulators are included...

Thanks for the latest version. Is there a reason why you use a separate, new package-version or is there something not 100% correct with your PXML? The new package was not updated automatically. I had to uninstall the old one and install the new one.

From FAQs: Mednafen is a portable, utilizing OpenGL and SDL, argument(command-line)-driven multi-system emulator with many advanced features. The Atari Lynx, GameBoy (Color), GameBoy Advance, NES, PC Engine(TurboGrafx 16), SuperGrafx, Neo Geo Pocket (Color), PC-FX, and WonderSwan (Color) areemulated

Emulator for what ? Again no real description.