There are unofficial (but highly functional) Android ports of Hollow Knight that allow you to play the full game on a modern smartphone with a controller.
However, the "PSP ISO" you are looking for refers to a impressive created by the community. This port allows you to play a version of Hollow Knight on your PSP or PPSSPP emulator.
The latest iterations of the Hollow Knight PSP homebrew projects feature impressive technical achievements for the vintage handheld:
Hollow Knight was built using the Unity engine. Unity requires modern processor architecture and significantly more RAM than retro consoles possess. hollow knight psp iso updated
Any model (1000, 2000, 3000, or PSP Go) running Custom Firmware (CFW) such as PRO-C or LME. A PC or Android Device: To download and transfer the files.
Most files labeled as a PSP ISO are actually unofficially ported homebrew projects or, in some cases, malware.
Scammers prey on this keyword. If you download a file that claims to be: There are unofficial (but highly functional) Android ports
Ensure your console runs stable, modern custom firmware like 6.61 PRO-C or infinity 2.0 to shield your system from corrupted file bricks.
If the game crashes instantly, press the Select button on the PSP home screen to open the VSH Menu. Ensure your "ISO MODE" is set to Inferno or Sony NP9660 .
Hollow Knight on PSP: The Ultimate Guide to the Updated ISO Port The Reality of Hollow Knight on PSP The latest iterations of the Hollow Knight PSP
What version is currently installed on your device?
To understand why even a fan-made ISO is unlikely, compare the PSP’s specs to the minimum requirements for Hollow Knight on PC: