To enjoy this game, you will need an emulator, as Sony no longer supports the PSP directly.
If you want a safe, functional portable wrestling experience, stick to the official PSP library using the emulator. Safe Installation Steps
Highly compressed versions of this ISO reduce the file size significantly from the original 1.3 GB down to 300 MB–600 MB. Compression tools strip out non-essential audio tracks or dummy data, making the game easier to download on slower internet connections and memory-restricted devices. Core Features of the 2012 Modification