Volcarona is a large, moth-like Pokémon with four small feet. It appears to have compound eyes that are two shades of blue, and there is a red horn-like structure on each side of its face. The fuzz on its upper body is smoky white and tangled. Its abdomen is black in the center and light blue with black dots on the outside. It has six leaf-like wings that are orange in color and have small black spots.
Volcarona releases burning scales from its wings to engulf the battlefield in a sea of fire. Volcarona's flames are said to provide a replacement for the sun when the atmosphere is dark with volcanic ash, and some legends claim that it hatched from a cocoon of raging flames to save people and Pokémon in freezing climates. It was feared as therage of the sun by ancient people, and it was even worshiped as a deity of fire in some places, they even referred to it as the embodiment of the sun. Volcarona's shrine in Relic Castle remains as a testament to the respect it commanded. Despite being worshiped in cold regions, it is unpopular in hot regions due to its burning body. Volcarona is also considered dangerous due to how it scatters hot burning scales, which can rob the surrounding air of its oxygen.
Slither Wing and Iron Moth bare a resemblance to Volcarona. Slither Wing is believed to be a revived ancestor of Volcarona. Iron Moth is believed to be Volcarona's descendant, possibly a UFO being controlled by alien life for observation.
Its wings may be based on the petals of a tiger lily, having the same number of extensions, black spots, and red-orange coloring. It also has motifs of the sun, with the black spots on its wings representing the dark spots on the sun. Volcarona may also be based on solar deities. Volcarona's head and antennae bear a resemblance to the headpiece of Hathor, which depicts the horns of the goddess cradling a disk representing the sun in between.
In addition, Volcarona's appearance may be loosely based on a seraph, a type of angel that is often associated with fire, as its name literally translates to "burning one". Like Volcarona, seraphim are often depicted with six red wings and no legs.
Volcarona may be a combination of volcano or Vulcan (Roman god of fire and volcanoes) and corona, referring to its Fire type and status as the Sun Pokémon.
Ulgamoth may be a combination of ウルカヌス Urukanusu (Vulcanus), 蛾 ga (moth), and moth.