MUGEN

This article needs some TLC. Read at your own risk.

MUGEN is a popular, veteran fighting game engine with a huge community behind it. It was developed by Elecbyte, initially released in 1999.

This system scrapes metadata for the “mugen” group and loads the mugen set from the currently selected theme, if available.

No MUGEN emulator in Batocera needs a BIOS file to run.

Place your MUGEN game files in /userdata/roms/mugen.

They are usually distributed as a folder for Windows PC, with .exe files and everything.

Rename the folder so that it has a .pc extension at the end. For example, if you have a game called MugenDreamVer1, copy it to your Batocera machine and rename it to /userdata/roms/mugen/MugenDreamVer1.pc.
Similarly to Windows games, you need to create an autorun.cmd file that contains the name of the main .exe for the Mugen game you want to run. For my example here, the autorun.cmd file would contain:

CMD=MUGENDreamVer1.exe

The bonafide engine itself. It is run via Lutris or Proton, your choice.

Standardized features available to all cores of this emulator: mugen.videomode, mugen.padtokeyboard, mugen.decoration

ES setting name `batocera.conf_key`	Description ⇒ ES option `key_value`
Settings that apply to all cores of this emulator
ESYNC `mugen.esync`	Can increase performance for games that stress the CPU. ⇒ Off `0`, On `1`.
FSYNC `mugen.fsync`	Can improve frame rates and responsiveness. ⇒ Off `0`, On `1`.
PBA `mugen.pba`	Vastly improves the speed of buffer maps. ⇒ Off `0`, On `1`.
VIRTUAL DESKTOP `mugen.virtual_desktop`	Define the resolution and a new dedicated window. ⇒ Off `0`, On `1`.

Here are the default MUGEN's controls shown on a Batocera Retropad:

Some MUGEN games need a pre-config before run on Batocera.

Open the game configuration file at /userdata/roms/<mugen game>/data/mugen.cfg and edit the applicable lines to:

GameWidth = 1920
GameHeight = 1080
Depth = 32
FullScreen = 1
RenderMode = OpenGL

For further troubleshooting, refer to the generic support pages.

BIOS