The most legal way to get an ISO is to create it yourself.
Managing game formats is a frequent pain point for PSP enthusiasts. psp iso club
While niche sites like this provide access to legacy content, they come with inherent risks: Security Risks The most legal way to get an ISO is to create it yourself
If you don't own a PSP, the is the gold standard. It’s available on PC, Android, iOS, and even VR headsets. The best part? Emulation allows you to play these games in 4K resolution , add post-processing shaders, and use modern controllers. It makes games from 2006 look like modern indie hits. The Ethics of the ISO Community add post-processing shaders