If you are having issues with the Gold version of PPSSPP-PSP Emulator this one is highly recommend by me, because i have personally tested the Emulator App and it doesn’t lag.
PPSSPP is the original and best PSP emulator for Android. It runs a lot of games, but depending on the power of your device all may not run at full speed.
PPSSPP-PSP Gold Emulator For Android
No games are included with this download. Use your own real PSP games and turn them into .ISO or .CSO files, or simply play free homebrew games, which are available online. Put those in /PSP/GAME on your SD card / USB storage.
Download PPSSPP-PSP Emulator 1.9.4 Apk Normal version
PSP Games For PPSSPP Emulator Android
Below are the links to the best PPSSPP-PSP Emulator games that works, just follow instructions on how to install them, each game has it own PPSSPP Emulator settings.