It sounds like you're looking for information on how to get Call of Duty: Black Ops 2 running on your phone or PC via a PSP emulator (PPSSPP)

was never officially released for the PlayStation Portable (PSP)

When searching for specific "descargar" (download) links on general software portals like Softonic, users often encounter: Adware and Bundled Software:

Call of Duty: Black Ops 2 was never officially released for the PlayStation Portable (PSP). Therefore, no legitimate PPSSPP-compatible file of this game exists. PPSSPP is an emulator for PSP games, but Black Ops 2 was developed for PC, PlayStation 3, Xbox 360, and later Wii U. Any website claiming to offer a Black Ops 2 PSP or PPSSPP file is likely distributing fake, modified, or malware-infected content.

For the best experience, stick to official Cloud Gaming streams for the real Black Ops 2, or enjoy the native PSP classic Roads to Victory on your emulator.