Questions About Moding Melee

[o0silentshadow0o]

So recently I have had a burning curiosity as to knowing how mods like "Silly Melee" were made. Obviously the programmers used coding, but how, which language did they use? How did they set everything up to even begin moding? What was the process?

I would really appreciate if someone gave me an answer , or show me a link as to where I can find this info.