It looks like you're asking about custom content or running All Star Yakyuken Battle on a PSP Go.
Here’s what you need to know:
All Star Yakyuken Battle was released on UMD only in Japan. Importing the disc is easy, but the PSP Go cannot read it. This left PSP Go users in the cold—until the "Custom" scene matured.
The PSP Go is the only PSP that supports Bluetooth and DualShock 3 controllers natively.
Is All Star Yakyuken Battle worth buying a PSP Go and installing custom firmware? Absolutely not—not for the game alone. All Star Yakyuken Battle Psp Go Custom
But as a tech demo of what CFW enables, it’s perfect. It represents:
In 2025, the PSP Go is a collector’s item. Custom firmware is its lifeblood. And All Star Yakyuken Battle is its strangest, most endearing parasite—a silly, sleazy, rock-paper-scissors relic that refuses to be forgotten.
Final Score (as a CFW showcase): 8/10
Final Score (as an actual game): 3/10
Final Score (as a conversation starter): 11/10
Have a rare PSP Go build? Dump your weirdest UMD and keep the oddities alive. It looks like you're asking about custom content
The game All Star Yakyuken Battle (also known as All Star Janken: Battle Portable) is a Japanese-exclusive title for the PlayStation Portable. It is essentially a digital version of the traditional Japanese "strip" rock-paper-scissors game known as Yakyuken. Gameplay Overview
The Objective: You choose an opponent from a roster of Japanese idols or "pretty ladies". You then play rounds of Rock-Paper-Scissors (Janken).
Progression: If the opponent loses a round, she removes a layer of clothing. A single match usually consists of five rounds, and winning all five in a row can unlock a special ending or passcode.
The "All Star" Roster: The game features various real-world models and idols, often with a "cosplay" influence in their outfits. PSP Go Compatibility & "Custom" Context Connect a DS3 controller via Settings > Bluetooth
The term "Custom" in your query likely refers to running the game on a PSP Go that has been modified with Custom Firmware (CFW).
Digital-Only Hardware: Because the PSP Go does not have a UMD disc drive, it cannot natively play the physical "All Star Yakyuken Battle" discs.
Running the Game: To play this title on a PSP Go, users typically use Custom Firmware (like ARK-4) to run a digital backup (ISO/CSO) of the game from the system's internal storage or an M2 memory card.
Region Free: While the game was only released in Japan, the PSP hardware—including the PSP Go—is region-free for games, meaning any version of the console can play it once the software is loaded.
Note: This game is intended for mature audiences (typically rated 16+ or 18+ in Japan) due to its adult themes and content.