Melmetal

Melmetal (メルメタル) is a -Type Mythical Pokémon and the evolved form of Meltan, and can only be obtained through the GO Park in Let's Go Pikachu! and Let's Go Eevee!.

Physiology
Although it retains the same gold hex nut, red cable-like tail, and metallic silver liquid body of its pre-evolved form, Melmetal has a muscular build, in addition of having another gold hex nut for a neck or look like a mask, and black hex nuts on its chest, and each two hands, shoulders, elbows and feet respectively.

Behavior
Melmetal was thought to be revered by humans many years ago because of its ability to manipulate and create metal from nothingness.

Evolution
Melmetal evolves from Meltan with 400 Meltan candies. This evolution can only take place in Pokémon GO.

Trivia

 * Melmetal is the heaviest Mythical Pokémon.
 * Melmetal and its pre-evolution, Meltan, have source code abilities even though abilities are not present in Let's Go.
 * Melmetal, along with its pre-evolved form Meltan, is the only Pokémon in Pokémon: Let's Go, Pikachu! and Let's Go, Eevee! to not be introduced in Generation I. Due to this, its Kanto Pokédex number (153) is not the same as its National Pokédex number (809).
 * Melmetal and its pre-evolution, Meltan, are the first Mythical Pokémon to be part of an evolutionary line.

Origin
Melmetal's head and hands are based on a hex nut. Its body is made up of steel that cools at room-temp, similarly to mercury. Its giant body structure, great power and status as a god-like being may reference the golem.

Etymology
Melmetal comes from melt, metal and possibly element or elemental.