If you don’t want to mess with save files, you can use cheat codes directly in PCSX2 to unlock characters instantly.
All hidden characters (Heihachi, Eddy Gordo, etc.) are unlocked. Max Currency: Millions of "G" to buy every outfit and item. tekken 5 all characters save game pcsx2 link
You can find verified save files from the following community sources. Ensure you select the version that matches your game region (e.g., NTSC-U for North America). GameFAQs Tekken 5 Save Files If you don’t want to mess with save