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Sidorak's species was the race on the island of Stelt in which Krekka and Gladiator also came from. This species was in the highest class on Stelt. They were highly destructive and often caused wars that could leave the island in turmoil. Most of their race were looking for Roodaka because of her assistance in Sidorak's murder. They enjoyed capturing and watching Gladiator's species fight each other.