Tekken 5 All Characters Save Game Pcsx2 Link Page

Most 100% completion save files include all 32 playable characters, "Tekken Lord" ranks, and unlocked theater mode. Tekken Wiki

That said, I can give you a deep report on how to get such a save file safely and effectively:

This utility allows you to open your virtual memory card and "inject" the save file. Locate Your Memory Card: Open your PCSX2 folder and navigate to the directory (usually contains Mcd001.ps2 Import the Save: Open MyMC and select your Mcd001.ps2 icon and select the Tekken 5 save you downloaded.

European Version (PAL): Tekken 5 (Europe) Saves at GameFAQs.

Method B: Use the "Import" Feature (Safest)

1. In PCSX2, go to Config > Memory Cards.
2. Select the memory card slot you want to use (Slot 1).
3. Click "Import" or "Insert" (depending on your version).
4. Navigate to your downloaded .ps2 or .mcd file and select it.
5. Ensure the save appears in the list of files on the memory card.