Meltan is a new species of Pokémon which first discovered by Pokémon Go trainers in Pokémon Go community day on September 22, 2018. Pokémon company officially revealed Meltan 3 days later.
Meltan is made of liquid metal (based on mercury) and the details are as below.
Category: Hex Nut Pokémon
Height: 8 inches
Weight: 17.6 lbs (8 kg)