Nvram |best|: Tekken 3

Use a tool like (Windows):

If you are playing Tekken 3 via the Multiple Arcade Machine Emulator (MAME), the NVRAM is not a physical chip but a file stored on your hard drive. Usually located in the nvram folder within your MAME directory, a file named tekkenn.nv (or similar depending on the ROM region) acts as the bridge between play sessions. tekken 3 nvram