http://www.newsweek.com/pokemon-go-lets-meltan-update-new-form-1162112

The Pokémon Meltan still remains a mystery, but new information has been released about its nature, when Pokémon Go players will be able to catch it and even a possible new form for the Steel-type.

Ever since its appearance in Pokémon Go during the Chikorita Community Day event, players have been stumped as to what Meltan actually is and how it connects to the Pokémon world. Shortly after the event, The Pokémon Company released the first official information on the Hex Nut Pokémon in a short video featuring Professor Oak and Professor Willow.