An ISO is a digital copy of the UMD disc. A clean, uncorrupted ISO of Shin Budokai 2 is typically 1.2 GB to 1.5 GB in size (CSO compressed versions may be ~800 MB).
Shin Budokai 2 features a robust unlock system, including: dragon ball z shin budokai 2 psp iso save data
A common frustration: You download a .max file (from Action Replay MAX) but your emulator expects raw .bin files. An ISO is a digital copy of the UMD disc
Solution: Use PSPSaveDataTool or PSV Exporter: dragon ball z shin budokai 2 psp iso save data