For some of you who develops hacks for this game. Where did you learn? and any advice or websites/books that will help me learn
You could look at some private soutcd code. Theres quite a few publicly accessible ones and start there
You can see the specifics of what 059 does if you use JPEXS to decompile the SWF file for the game. Although just looking through it won't do much; learn a programming language, there are millions of videos on Youtube to get you started.
I know alot of people are going to say you should jump right into looking at source, but I feel like its essential that you learn the very basic oop/general concepts. You cant obtain meaning from language if you dont know words. Watching this will give you a good understanding