As being a Boneknapper, this individual is fairly a large dragon.
Gobber's Nemesis and Gobber the Belch have been rivals for quite long periods, however this was mostly due to the Boneknapper's objective to gain the perfect bone piece Gobber had with him, and Gobber didn't know about the species' nature to seek for bone armors.
As long as his desire is fulfilled, Gobber's Nemesis seems very friendly and playful to humans, like that of dogs. He is also quite generous, as he let Gobber, Hiccup, and the other members of the gang back to Berk, by letting them ride on his back.
Strength: He is capable of carrying Gobber and all the members of the gangs on Berk (with a sheep as well) with ease.
Stamina: Being a fully-grown Boneknapper, he has high leveled stamina to keep wearing the bone armor for his lifetime.
Fire Breath: He bursts a rapid torrent of flame from his mouth that is unique to his species. This fire doesn't seem to be the hottest of all, but due to his size the range of the attack is quite large.
Thundering roar: He seems to have tremendous lung capacity as that his single roar can blow away surrounding objects vigorously. Without the special bone piece, however, the dragon's roar is nothing more than an air leakage sound from the vocal cord. How this logically works is currently unstated. This is also a mating call as well.
- The existence of the Boneknapper raises the question as to whether the Hammerhead Yak and Hammerhead Whale are also more than just fabrications. If so, it means that Gobber has seen Thor himself.
- In Rise of Berk, the dragon's eyes change color from green (hatchling) to red (adult). Gobber's Nemesis in the short film appears to have green eyes.