Here are a few codes I made for the NTSC version of FFX-2. Since I didn't find a debug code for the NTSC version, I made one for myself. For easy access, here is a Codebreaker Day 1 file, and a AR Max bin file.
For the Battle Debug code, you need to press the buttons corresponding below at the main menu and then turn them off when inside the battle room. You'll need to select New Game or Load Game to enter.