Melmetal

Melmetal (メルメタル) is a -Type Mythical Pokémon and the evolved form of Meltan.

Physiology
Although it retains a same gold hex nut, red cable tail-like and metallic silver liquid body of its pre-evolved form, Melmetal has a muscular built, 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.

Trivia

 * Melmetal is the heaviest Mythical Pokémon.

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.