Great! You could try using this Java editor. You should open your decompressed Chapter files with it (the ones which end with "_dec"). You can edit classes, equipped skills, Avatar appearance, and a little bit more.Yes. I was able to edit gold to max successfully. Now I will try to experiment to get x99 items, etc.
http://gbatemp.net/threads/wip-fireeditor-fe-a-save-editor.397493/