Short answer: there’s no official PSP release of the main Inazuma Eleven titles from the publisher, and most "PSP ISO" files you’ll see online are unofficial conversions, fan projects, or mislabelled downloads. In 2021 interest spiked as people hunted ways to play classic games on modern devices, but that also increased the circulation of unsafe or illegal files.
Short answer: there’s no official PSP release of the main Inazuma Eleven titles from the publisher, and most "PSP ISO" files you’ll see online are unofficial conversions, fan projects, or mislabelled downloads. In 2021 interest spiked as people hunted ways to play classic games on modern devices, but that also increased the circulation of unsafe or illegal files.