Sonic the Hedgehog is a Japanese platform video game series and media franchise created by Sega and featuring their mascot, Sonic. It is a series of fast platform games. Sonic is the main character. He is a blue hedgehog with supersonic speed. Usually, Sonic must stop the villain, Doctor Eggman's, plans for taking over the world. Sonic is often helped by his friends like Tails, Amy Rose, and Knuckles.