Dustbrawler appears similar to a normal Smothering Smokebreath. However, he has a slight purple tint on his wings, neck, head, and tail. He also has purple spikes on his head, neck, and tail.
This dragon along with other of his kind were lured by Hiccup, Astrid and Snotlout from Breakneck Bog to Iron Isle so they could steal Snotlout's axe from the Armorwing. However, when Hiccup discovered that an Armorwing has no scales, the trio lured them away with a huge ball of metal.
When Snotlout goes on a journey on Iron Isle, his metal disappears. But when he began to search, he discovers that a group of Dustbrawlers stole it. Thinking fast, Snotlout picks some metal and lure the Smokebreaths to the ocean and let them catch their treasure, then he returns and get his metal back.