Because the PSP Go lacks a UMD drive, you cannot play a physical copy of the game. You must use Custom Firmware (CFW)
The title is categorized as an "Idol Movie" or "UMD-Video" game, blending live-action footage with gameplay. Gameplay Mechanics All Star Yakyuken Battle Psp Go Custom
: Ensure your PSP Go is running on official firmware 6.60 or 6.61. You can update this via Wi-Fi or by placing an EBOOT.PBP update file in PSP/GAME/UPDATE/ . Install PRO-C or LME : Because the PSP Go lacks a UMD drive,
The PSP Go was the first and only Sony handheld to exclude the UMD drive, relying entirely on internal storage and Memory Stick Micro (M2) cards. Because All Star Yakyuken Battle was largely released on or physical UMD discs, it cannot be played on a standard PSP Go without modification. You can update this via Wi-Fi or by placing an EBOOT
While originally released as physical UMDs, the —which lacks a disc drive—requires a "custom" approach to play these titles today. 1. Why Use Custom Firmware (CFW)?