If you already have the standard version of Tekken 3 and don't want to hunt for save files, you can speed up the unlocking process using Cheat Codes.
Downloading an “all characters unlocked” PSX ISO is a practical choice for modern players who value their time. Just be aware of the legal nuances, support the official rereleases when they appear (like the Tekken 3 arcade cabinet in Tekken 5 on PS2), and always back up your own discs if possible.
: Beat him in Tekken Ball Mode (unlocked after beating Arcade once) or achieve a high score in Survival Mode and enter "GON" as your name.
If you want to unlock them yourself, you can "cheese" the game quickly: 0;16;
0;ffc;0;2cb; 0;908;0;f1; 0;88;0;98; 0;279;0;17a; 0;1247;0;b19;