I finally found a way to figure out the Game Build i.d. I and a few others in this thread have asked for help.
You need to use a hex editor. And add the exeFs file to the editor program. Line 40 will show the title id.
it is in this video. Time stamp is at the 5:00 minute mark. Kind of crazy that there is not a simple way to find it included in the emulators themselves.
They only work so far into the game. I found that the addresses for these values change after EMMI/Boss fights. After I defeated the Experiment in Cataris, there is no longer infinite HP and Infinite missiles stopped working even before this point.
And yes, with codes on, I did try the getting hit and cycling through and there is no infinite of either. I can still run out of missiles and I lose HP through several of my energy tanks.