The Sky Kingdom is the home of the SkyWings. It is located on the "wing" and parts of the "torso" of the dragon-shaped continent of Pyrrhia, and it stretches across the entire northeast and center, reaching and ending at the outskirts of the Mud Kingdom and the Rainforest Kingdom. It is about as large as the Kingdom of Sand.
The Sky Kingdom is located in central Pyrrhia and it contains the Claws of the Clouds Mountains, the SkyWing Palace to the far north, Jade Mountain, and the cave where Kestrel, Webs, and Dune raised the Dragonets of Destiny for six years.
At the very south of the Sky Kingdom is Jade Mountain, the tallest mountain in Pyrrhia. There is rumored to be a "dragon of Jade Mountain" that is friendly to the Talons of Peace, that was later revealed to be Stonemover, Sunny's NightWing father, in the fifth book, The Brightest Night.
The Diamond Spray River begins at the base of the mountain, in which the SkyWing palace rests and flows through the middle of SkyWing territory and onto the edge of the Mud Kingdom, as well as the Rainforest Kingdom. The Kingdom of Sand borders it in the southwest, while the Ice Kingdom is northwest. Assuming that the SeaWings rule the entire northern ocean, the Sky Kingdom also borders the Kingdom of the Sea to the northeast.
Numerous scavenger dens have been reported in the Sky Kingdom.
Ruby's palace is located in the upper segment of the Sky Kingdom and it is described as a huge fortress carved from a mountain. More tunnels are blasted out every day by SkyWing subjects, with half of the palace inside the mountain and the other half is open to the sky and heavily defended. The castle is said to be damaged from battle, with collapsed towers and scorch marks from fire attacks. Clay, Tsunami, and Starflight had been taken there in the time of Queen Scarlet and the palace had been described with gold talon prints, gold veins on the walls and floors, and the throne room "as if a giant dragon had stumbled around the room, vomiting gold all over the place". It is noted in Escaping Peril that the gold has been removed by order of Queen Ruby.
Dragons captured in battles against the SkyWings are sentenced to fight in gladiator battles to the death in a huge, bowl-shaped arena. The prisoners are kept on tall rock spires with no bars, spread out in a circle around the perimeter of the arena. The dragons are held down by metal clamps, and wires that are wound around their limbs stretch across the arena, connecting all of the prisoners to each other.
If a dragon wins a certain amount of arena fights, they are set free, although this has never happened because Scarlet sends Peril to fight the dragons that get more than three or four wins. SkyWings and MudWings watch from stands. Occasionally, the gladiators fight groups of captured scavengers.
The arena has now been torn down and replaced by a hospital for war veterans in Escaping Peril.
The Sky Kingdom is the main setting of The Dragonet Prophecy.
When the dragonets of destiny were captured along with Kestrel by Queen Scarlet, they were brought to the SkyWing Arena and Queen Scarlet's Palace by soldiers and made prisoners. The dragonets were then forced to battle in the arena. There, Clay, with the help of Glory's venom, defeated Fjord, the IceWing opponent he was pitted against. Tsunami killed a couple scavengers, as well as Gill, a SeaWing driven mad by lack of water, who also turned out to be her father later in the books. During Clay's time at the arena, he and Peril met and they grew very fond of each other and became good friends.
In The Dark Secret, Morrowseer flies the alternate dragonets and Starflight across the ocean. They end up in The Sky Kingdom, and Morrowseer takes them to an outpost far away from the Palace made for watching for IceWings, in case they try to attack from the north. He tests them and tells them to convince them to switch their alliance from Burn to Blister. Starflight and the other dragonets fail, and Morrowseer kills all the SkyWings.