Are you playing on a or the PCSX2 emulator ? What game region do you have (Europe/PAL or Japan/NTSC-J)? Which file format did you download (.max, .psu, or .cbs)?
If you prefer to unlock characters yourself, here are some key methods: Clear Hades Chapter with all characters.
Unlocking special character costumes (like Gold Cloths for Bronze Saints). saint seiya the hades ps2 save data
Shion, Saga, Deathmask, Aphrodite, Shura, and Camus.
to mass:/ (this represents your USB drive) using the controller. Locate the save file, press Circle , and select Copy . Navigate back and enter mc0:/ (Slot 1) or mc1:/ (Slot 2). Are you playing on a or the PCSX2 emulator
Select your USB drive, locate the Saint Seiya Hades save, and choose the option to extract it directly to your PS2 Memory Card. How to Use Save Data on PCSX2 (PC Emulator)
100% completion of the in-game theater, card gallery, and BGM/sound test modes so you can enjoy the anime-accurate soundtrack and voice acting. How to Transfer Save Data to a Physical PS2 If you prefer to unlock characters yourself, here
Complete character profiles and cinematics. How to Install PS2 Save Data (PCSX2 Emulator)
Complete Guide to Saint Seiya: The Hades PS2 Save Data (Unlock Everything)
If you’re new to emulation, follow this simple guide: