Running on PPSSPP (a PSP emulator for Android), Ben 10: Omniverse 2 holds up reasonably well. The cel-shaded art style matches the cartoon, and on a decent Android phone (Snapdragon 660 or higher), you can upscale resolution to 2x–3x for cleaner visuals. Frame rates are stable at 30–60 FPS with minor tweaks (e.g., rendering resolution, frameskipping off). Some particle effects may lag on lower-end devices.
Go to Tools -> Developer Tools -> Save configuration file for game after tweaking. This ensures PPSSPP remembers settings just for Ben 10. ben 10 omniverse 2 download for android ppsspp link