a computer-animated children's television series, produced by Sega of America, Inc. and Technicolor Animation Productions in collaboration with Lagardère Thématiques and Jeunesse TV, respectively for Cartoon Network, Canal J, and Gulli. Based on the video game franchise Sonic the Hedgehog created by Sega, the series is the fifth animated television series based on the franchise, and the first to be produced in computer-generated animation and in high definition.