King Sombra pet dragon facts

Gronckle

Official Description"One of the toughest dragons in our world is the Gronckle. Gronckles have gigantic heads, short bodies, and round tails. Gronckles are lazy, and spend most of their time sleeping in communal heaps. They have been known to fall asleep while flying, waking only when they crash into the ocean or the side of a mountain. Gronckles have relatively small wings that beat as fast as a hummingbird's. They are slow in the air, but make up for this with their maneuverability. A Gronckle can fly backwards, sideways, and even hover. Gronckles attack from the air, where their primary weapon is most effective. Gronckles chew rocks, melting them in their bellies and firing them as balls of molten lava." — "This Boulder Class Dragon is not built for speed, but it can fly like a . A giant, stubborn hummingbird that shoots lava rocks!
The Gronckle's tough hide can take more hits than almost any other Dragon...or any two Dragons combined!" — "With its bulbous shape, tiny wings and laid-back demeanor, the wart hoggish Gronckle is proving to be a fan favorite.
He is a series of round balls, including warts. He's just lazy, cantankerous and grumpy, and that makes you like him even better. The critter is known to doze off even in mid-flight as he floats about like the Goodyear blimp. But there is no denying that his fire packs a lethal punch." — Sanders "This dragon is one of the toughest in the world. Gronckles are lazy, and spend most of their time sleeping in communal heaps" — Development"Flies like a cross between a bumblebee and a helicopter, fueled by the roar of a motorcycle. " — Simon Otto, Head of Character Animation

Simon Otto also mentions that the Gronckle is inspired by a mix of a pit-bull, a crocodile, a Harley-Davidson, and surprisingly, a helicopter. While the Gronckle evidently gains inspiration from a bumblebee's stature and a helicopter's ability to hover and move in all directions, the Gronckle is also based off walruses and rhinoceroses. The animation team studied their behavior and movements, and imagined how the Gronckle would be like if it had the size and speed of a hummingbird's wings. 

While most of the early concept art still preserve its stubby, segmented body, as well as warty skin, several variations on their spikes and body design exist. Gronckle by Nico Marlet, for example, features a much larger lower jaw. Whereas another depicts the Gronckle with a more '' like vibe, for it has a significantly longer tongue, frilly nasal horns and eye lids, smoother skin and leaf-like lobes along its back.

Physical Appearance

Gronckle eggs are the smallest of all the species. Some are a bluish color, while others are goldish, some even purple, and have a rocky appearance. They also bounce around like jumping beans. They are shown to explode when they hatch. Although the eggs are supposed to be barely larger than a marble, it's shown that eggs are just a bit smaller than the average Viking head and snugly fit inside Viking helmets.

to Adult

The Gronckle can be a slow, lazy, and cranky bulldog-like dragon, It has been known to fall asleep mid-flight, waking only when it plunges into the sea or crashes into a mountain. They spend the majority of the day sleeping. However, during battle, they can be fierce adversaries because of their high defenses.

Because of its tremendous weight and small wings, it would seem impossible for them to fly. However, because the wings of a Gronckle beat at a speed similar to that of hummingbirds', dragonflies', or wings, it is possible for one to sustain flight. In fact, a Gronckle can fly backward, sideways, and even hover in place. However, due to their massive weight and small wings they are the slowest species in the dragon world, which is not helped by their extreme tendencies towards laziness and falling asleep whilst flying. Despite this, they can still perform some pretty impressive flight manouveres when trained to do so. Its tail can be mistaken for the head if little attention is paid to it.