If you want to play Castle Crashers on a handheld, the officially supported options are:
The game received generally positive reviews for its humor, graphics, and gameplay. If you're looking for a PSP ISO of the game, ensure you're obtaining it from a reliable source. i castle crashers psp iso verified
Any file claiming to be a "verified PSP ISO" of Castle Crashers is likely a fan-made project, a "skin" of another game, or potentially harmful malware. If you want to experience the game legally and safely, here are your best options: Official Platforms for Castle Crashers Modern Consoles : You can play Castle Crashers Remastered Nintendo Switch PlayStation 4 If you want to play Castle Crashers on