Sonic the Hedgehog is a Japanese video game series and media franchise created by Sonic Team and owned by Sega.The franchise centers on Sonic, an anthropomorphic blue hedgehog who battles the evil Doctor Eggman, a mad scientist.The main Sonic the Hedgehog games are platformers developed by Sonic Team, in addition to spin-offs set in the racing, fighting, party, and sports genres.
https://en.wikipedia.org/wiki/Sonic_the_Hedgehog_%28series%29

