JKPatch / MemView process memory tool I found a really good app to search for PS4 game cheats called PS4Cheater that was recently updated to PS4 Cheater 1.1 and then v1.2 by the Chinese developer via Duowan BBS.
Download: PS4Cheater_1.1.rar (Pass: ubmi) / PS4Cheater_1.1.rar (32 KB - Mirror) / PS4Cheater_1.1.rar (Mirror #2) / PS4_Cheater_1.2.rar (0.06 MB) / PS4_Cheater_4.55.rar (v1.2 Mirror) / PS4_Cheater.exe (0.05 MB) / PS4Cheat Data for dumb.rar (14.57 MB) / PS4Cheat Manager v0.1.3 (15.3 MB) / ps4cheater 1.3.7z (191 KB) / GIT
In 5 minutes I found codes for HZD, Gravity Rush and Bloodborne for my 4.05 PlayStation 4 console... Good search!!!!
Below is a brief English guide from Pretinaverse with a follow-up HERE along with some Tales of Zestiria (CUSA02461) Cheats, and to quote roughly translated from the Chinese BBS post: