Sparks and Spew is a Titan Wing Hideous Zippleback featured in a pictorial short story called "To Tame a Titan", released on Facebook and Tumblr by DreamWorks on October 1, 2014.
Sparks and Spew threaten to damage Berk because the two heads cannot agree what to eat: mountain sheep or fish. Unfortunately, Berk is in the way of their argument. The story implies that Titan Wing Zipplebacks may have greater problems deciding what to do; the heads get more independent of each other. Their dilemma is solved by Ruffnut and Tuffnut. They create a 'coin' out of the Titan Zippleback's scale to flip, with waves on one side and a flame on the other. Sparks and Spew seem to understand this concept, and take the coin with them when they leave Berk.
Sparks and Spew appear to be a giant version of Barf and Belch, with little extra horns or spikes.
- Sparks and Spew are the second titan wing that the gang has come across, with the first being Hookfang's Nemesis.