Hobblegrunt

The Hobblegrunt is a new dragon that will appear in the upcoming sequel, How to Train Your Dragon 2.

Dragon Appearance
The Hobblegrunt has a frilled lizard (or Triceratops, judging the frill is not fully surrounding it's head/neck) look and has very sharp teeth. The Hobblegrunt has a single horn and and a frill surrounding its head.

The Hobblegrunt's eyes are colored yellow, and it also has small, clawed wings. It has tiny arms and big legs like a Deadly Nadder. It also appears to have a long neck as well.

The Hobblegrunt is also able to change its colors like a chameleon, and this ability is similar to that of the Changewing.

Abilities
Like the Changewing, the Hobblegrunt is able to change its colors.

It's fire type is an ethane expectorant. In other words, it shoots noxious gas at it's enemies.

The Hobblegrunt is able to sense its surroundings with the large frill on its head.

Trivia

 * Valka owns a Hobblegrunt named Gruff.
 * The Hobblegrunt is the second dinosaur-like dragon, with the first being the Speed Stinger. It is also the second dragon that is able to change its colors, with the first being the Changewing.
 * The Hobblegrunt looks like a mix of a Deadly Nadder (legs and wings), Hideous Zippleback (head), Speed Stinger (arms), Skrill (wing claws), and Monstrous Nightmare (tail's end).
 * Although the 'Guide to the Dragons' stated that the Hobblegrunt was a Boulder Class dragon, the offical website later revealed it was a Stoker Class dragon.