Attach Debugger?

[LunaMoo]

You can use cheat engine with ppsspp, just make sure to turn on "Mem mapped" in scan settings as it's off by default. The CE debugger is mostly useless for messing with psp games through as it doesn't support mips. You can just use ppsspp built-in debugging features(hard to miss debug menu in windows), you can also try jpcsp as it has some different features or just get something more advanced like IDA pro(never really used it myself, but it is popular for all kinds of psp stuff).