When coloring Volcanion, it may be best to choose vivid oranges and yellows to really bring out the fire-type aspect of this Pokemon. Accents of deep red, brown, or even black can also be used to help enhance Volcanion's more fierce look. To add highlights to the body and wings, a bright white or light grey may be used to create a cool, glowing effect. For the eyes, a deep blue or purple might be a great choice to give Volcanion a mysterious, wise look. Using multiple shades of these colors to add shade and depth to the final result would make an incredibly vibrant and beautiful coloring page.