pokemon_translations_fr_en.rb

require 'json'
require 'nokogiri'
require 'mechanize'

puts 'Get source'
agent = Mechanize.new
html = agent.get 'http://bulbapedia.bulbagarden.net/wiki/List_of_French_Pok%C3%A9mon_names'
nodes = Nokogiri::HTML.parse html.body

puts 'Parse html'
translations = {fr: {}, en: {}}
nodes.css('#mw-content-text > table > tr')
  .select do |x|
  x.children.count{|y| y.name == 'td'} == 4
end.each do |x|
  c = x.children.select{|x| x.name == 'td'}
  code = c[0].text.strip
  if code[/[0-9]/]
    translations[:en][code.to_i] = c[2].text.strip
    translations[:fr][code.to_i] = c[3].text.strip
  end
end

puts 'Write pokemon.fr.json'
File.write 'pokemon.fr.json', translations[:fr].to_json

puts 'Write pokemon.en.json'
File.write 'pokemon.en.json', translations[:en].to_json

puts 'Done!'