CharacterName/ ├── CharacterName.def (main definition file) ├── .sff (sprite file) ├── .air (animation file) ├── .cmd (command file) ├── .cns (constants/controls) ├── .snd (optional) (sound file) └── other files (.st, .pal, etc.) Do NOT rename the .def file unless you also rename its internal references. Keep the character folder and .def name matching for simplicity. Step 2: Locate Your M.U.G.E.N’s chars Folder Inside your M.U.G.E.N directory, find the folder named chars . If it doesn’t exist, create it.
chars/DBZ/Goku/Goku.def You can set order (AI starting position): mugen install characters
MUGEN/ ├── chars/ <-- characters go here ├── data/ ├── stages/ └── mugen.exe Copy the entire character folder (e.g., Goku/ ) into the chars folder. CharacterName/ ├── CharacterName
Result: MUGEN/chars/Goku/ (Inside: Goku.def , etc.) Go to MUGEN/data/select.def . Open it with Notepad. If it doesn’t exist, create it
chars/CharacterFolderName/CharacterFileName.def If your character folder is Goku and the .def is Goku.def :
chars/Goku/Goku.def For a character in a subfolder like chars/DBZ/Goku/ :