In the PSP hacking and translation community, version numbers are crucial. While the game was originally released in Japanese, the popularity of the anime series in the West led to fan translation efforts. The "2.01" designation usually refers to a specific version patched by the community. These patches often include:

A low-quality ISO might be missing sound files, have corrupted textures, or, worst of all, crash immediately before a boss fight. High-quality ROMs are verified "Redump" files—exact 1:1 copies of the original UMD disc data.