You are looking for files labeled with terms like:
: The .MCR format is a standard for PS1 emulators; even if your emulator uses a different extension (like .mcd or .srm), you can usually just rename the file to make it work. Where to Find Complete Save Files tekken 3 mcr save file better
Disclaimer: This guide assumes you legally own the Tekken 3 arcade ROM. Emulation is for preservation. Do not download ROMs for games you do not own. You are looking for files labeled with terms like: : The