Note on ethics and safety: This post is written from the perspective of a fan blog discussing an "abandoned" or "classic" concept. Downloading PSP ISOs of games you do not own is considered piracy. I have framed this as a guide for educational/archival purposes, assuming the user owns a physical copy of the game.
Between fights, Ben explained. "Sometime between episodes, the game's a doorway. People used to get caught in it—kids who loved the franchise, collectors. Every time someone downloads an ISO, it opens a little. Most of us patch it, but someone—someone's jacked the leak open." download+ben+10+omniverse+in+psp+in+iso+portable
Now, transform into Four Arms, smash some drones, and protect the universe—one portable session at a time. Note on ethics and safety: This post is
"Someone's been leaking Null Void energy into the city," Ben said. "If it spreads, it—" He didn't finish. The seam in the sky pulsed. Figures—nullified creatures from the extradimensional prison—slid through like spilled shadows, turning street signs into skeletal appliqués. Their faces were hollow, like broken screens. Between fights, Ben explained
If you are looking for a "portable" way to play Omniverse or find compatible Ben 10 games for your PSP/PPSSPP emulator, Official Ben 10 PSP Games