Standard ISO rips from 2008-2012 were notoriously flawed. They suffered from:
Locate the root directory of your memory card (the top-level folder). All Star Yakyuken Psp BETTER Download
Do you need a guide on how to on a PSP?
The PlayStation Portable (PSP) hosted a massive library of unique titles, but few sub-genres are as distinct as the Japanese rhythm-adventure market. Among these, All Star Yakyuken stands out as a cult classic. Melding traditional rock-paper-scissors mechanics with high-energy rhythm segments and live-action video elements, it captured a highly specific niche of the gaming community. Standard ISO rips from 2008-2012 were notoriously flawed
Even with the "BETTER" version, you might face issues. Here are quick fixes: The PlayStation Portable (PSP) hosted a massive library
All Star Yakyuken 2 Portable (UMD Video) (Japan Version) PSP
For safe and legal gaming, it is recommended to acquire the physical game and dump your own ISO file.