Use the mymc tool to open your PCSX2 virtual memory card.
This usually happens when moving saves between different versions of PCSX2. Always keep a backup of your Mcd001.ps2 file before importing new data. battle stadium don ps2 save data
Download a "100% Complete" save file from a reputable source like GameFAQs. Use the mymc tool to open your PCSX2 virtual memory card
Open uLaunchELF on your PS2 and copy the folder from mass:/ (USB) to mc0:/ (Memory Card Slot 1). battle stadium don ps2 save data
Import the downloaded file into the memory card image.