Super Robot Taisen OE - Operation Extend

[LunaMoo]

@Sarlandogo You can only patch the game using real psp, most popular way would be with iso tool, you can find tutorials how to do it on youtube or pretty much anywhere else. You can't do it on any emulator since updates are encrypted.

As for the exp, that cheat doesn't set exp, it multiplies exp you normally get, so 9999 would be really high if not too high since the game game does limit max exp anyway and leveling isn't really soo slow to begin with. Anyway "9999" in hex is "270F" so that you would have to put in place of "nnnn". If you don't know hex you can just use windows calculator in programmer mode or any decimal > hexadecimal converter, some more advanced calculators for smartphones do allow such conversion as well.
Notice the note that those cheats being only for v1.08, so don't use it before updating your game, at best nothing will happen, but the game might also crash, freeze or anything alike.