Script for Dai no daibouken: Hero's bonds

[Feru]

Hi, I'm searching scripts for Dai no daibouken Hero's: bonds. I've tried to hack it, I found the values (I think), but I can't change them. Honestly, I barely understand what I'm doing, so please, if you can do the scripts, or a tutorial. I want gems, upgrade items, exp multiplier, make the characters stronger or bosses easier to beat, like with just 1 HP, something like that, hope is not something impossible to do. Thanks in advance.