Meltan and its evolved form Melmetal are a pair of Mythical Pokémon first discovered in the Kanto region. the pair were introduced in the core series in Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, although it first appeared in Pokémon GO, by way of large numbers of Ditto disguised as Meltan. Later, it was revealed that Meltan can evolve into Melmetal. Meltan is known to be curious and expressive. It is instinctively drawn to metal that it could dissolve and absorb, including other Meltan. This behavior allows them to combine and evolve into Melmetal. Melmetal was worshiped in ancient times for creating metal. After it lifespan reached its end 3000 years ago, it turned into several Meltan, however its worshipers stored the Meltan in Mystery Boxes where they can be kept safe until they can fuse into a Melmetal once again.