By using this one
Game Name: Wild ARMS 3
Codebreaker Injected: YES
Widescreen: YES
Title-ID: SCUS-972.03 / NTSC-US
Size: 2.7GB
Issues: None I've noticed.
Notes: Made from official Sony PS2 Classics pack.
This game has been injected with Codebreaker. When you first run the game on PS4 it will run uLaunchELF, allowing you to run Codebreaker and select cheats for the game should you so wish.
Press O to load File Manager.
Navigate to "CDFS" and then "--ELF--" folder and run
CODEBR~1.ELF
Codebreaker will launch and allow you to select cheats for
Wild ARMS 3
Once you've selected your cheats, press START (right-side of trackpad on DS4) and go to the disc icon.
When Codebreaker asks you to "Please Insert Game" just press X to launch your game with cheats applied.
The game will reboot to the uLaunchELF menu. This time rather than opening "--ELF--" folder, simply scroll down the list and select
SCUS_972.03 to run your game

If you don't want to use Codebreaker at all, just run
SCUS_972.03 from the "CDFS" menu and skip "--ELF--" altogether.
***Hidden content cannot be quoted.***