Bumble

Bumble is a young Scauldron, who made his first appearance in The Endless Night. He was one of the dragons held captive by the Thunderhead Tribe, until the Riders freed him. Afterwards, he loved to play with Hiccup a lot, but was making a big mess around Berk, so he finally to find a pod of Scauldrons, and left Bumble with them.