Nsfw game mode or alt nude skins

[deathadder96]

How do I switch to nsfw mode or use nude skins? Thanks in advance

[ddlnll]

There is no character information in the MUGEN main program. All the NSFW characters you have seen are from added character files.
So there is not so-called "NSFW mode" in MUGEN. If you want to play these contents, you must download and collect character files from the Internet, and install them into MUGEN.