Even the best option file has limits due to PS2 hardware:
In the context of Winning Eleven 9, option files refer to files that contain data and settings that can modify or enhance the game's behavior. These files can include new teams, players, stadiums, and other game data. Option files are created by the game's community and can be used to update the game's rosters, kits, and other features. winning+eleven+9+ps2+option+file+better
Since official online servers are long gone, you’ll need to transfer the file via a USB drive and a compatible memory card tool: Even the best option file has limits due
Winning Eleven 9 (WE9) —released as Pro Evolution Soccer 5 (PES 5) winning+eleven+9+ps2+option+file+better