A vibrant cartoon portrait of the Dragon King, exuding both regal authority and whimsical charm. The Dragon King is depicted with a grand, exaggerated crown made of shimmering gold and encrusted with oversized, glowing gemstones that sparkle in the light. His scales are a bright, iridescent green with hints of blue and purple, each one meticulously detailed but with a playful, stylized touch. His eyes are large and expressive, with a mischievous glint, and his wide, toothy grin reveals rows of gleaming, cartoonishly sharp teeth. Around his neck, he wears a majestic cape made of flames that flicker and dance in vivid shades of orange and red, adding to his imposing yet approachable demeanor. The background is a throne room filled with treasure, piles of gold coins, and a ruby-encrusted throne, all drawn in a lively, exaggerated style. The overall atmosphere is one of fun and fantasy, capturing the Dragon King as both a powerful ruler and a lovable character. Bold colors, high contrast, whimsical design, cartoonish and endearing, 16k resolution, masterpiece.