Script to export the scripts inside the Scripts.rvdata2 data file to Data/exported_scripts as plain text Ruby files. If you run this script from inside RPG Maker VX Ace, I would suggest creating the Data/exported_scripts folder yourself as RGSS3 doesn't seem to support requiring FileUtils. Based on HIRATA Yasuyuki / 平田 泰行's rvdata2_dump.rb script:

Scripts.rvdata2-exporter.rb

#! /usr/bin/env ruby
# encoding: utf-8
#
# Script to export the scripts inside the Scripts.rvdata2 data file to Data/exported_scripts as plain text Ruby files.
# If you run this script from inside RPG Maker VX Ace, I would suggest creating the Data/exported_scripts folder yourself
# as RGSS3 doesn't seem to support requiring FileUtils.
# Based on HIRATA Yasuyuki / 平田 泰行's rvdata2_dump.rb script: https://gist.github.com/hirataya/1853033
begin
  require 'fileutils'
rescue LoadError
  puts "Can't load fileutils; ensure that the Data/exported_scripts folder has been created"
end

class Exporter
  def self.export_scripts
    path = File.join("Data", "exported_scripts")
    FileUtils.mkdir_p(path) if defined?(FileUtils)
    
    counter = 0
    Marshal.load(File.binread(File.join("Data", "Scripts.rvdata2"))).each.with_index do |cont, index|
      id, name, code = cont
      code = Zlib::Inflate.inflate(code).force_encoding("utf-8")
      next if id.nil?
      if code.size == 0
        puts "Skipping [#{index}] #{id} #{name}"
        next
      end
      
      puts "Exporting [#{index}] ##{id}: #{name} to #{File.join(path, "#{name}.rb")}"
      File.open(File.join(path, "#{name}.rb"), "wb") do |f| 
        f.puts "# encoding: utf8"
        f.puts "# [#{index}] #{id}: #{name}"
        f.write code
      end
      counter +=1
    end
    puts "#{counter} files successfully exported."
  rescue Exception => e
    p e
  end
end

Need to add : require "zlib"