The Storm King is a king of storms that appeared in the cartoon show episode "The Littlest Viking". He is an ancient and paranoid individual who has tormented a small viking village since ancient times, believing that the villagers wanted to destroy him and steal his crystals. Everyday he mines his crystals with his great strength, which causes boulders to fall from the mountain and onto the village below, making the villagers believe that the Storm King is intentionally trying to harm them and view him as hostile which also causes the Storm King to view them in the same way.
In "The Littlest Viking", Peewit was revealed to be the chosen viking warrior of legend who would stop the Storm King once and for all. Upon confronting the Storm King, Peewit and the Smurfs defeated him by having a large rock fall on him, but after explaining that they meant him no harm and the misunderstanding going on between him and the villagers, the Storm King realized his mistake and with the aid of Peewit a pact of peace was made between the Storm King and the Vikings.
The Storm King is a powerful being of tremendous strength and size equal to a giant's. He can lift giant boulders over his head and mine out tough crystals. He also has a powerful breath that is as strong as the wind and can even push sails.