Answer 1. No I'm not changes in save, If the game have renewing system that is mean need ASM to break it
Answer 2. I don't think so, Maybe right or not because not all games do that.
Answer 3. That is mean level is control for balance states, I need change level...
I remember I try hack Final Fantasy Crisis Core and I found ASM Addresses in RAM for let Zack one battle max level but when I search in ISO Rom I don't found addresses maybe compress data also all psp games same ?
HA! Crisis core is unique sh!t. I tried to hack it do delete annoying Zack & play with normal characters, but game changes data places for battle characters after every fight & every loading. I made some custom combos though...
I think you should use cwcheat or cheat engine & just edit data on the fly.
When I hacked FF2, game constantly changing 4 char, so if you want single one all game with all his stats, you need to copy all addresses just before game changing him, then insert them right after. Or your char will not grow correctlyXD