is a fictional character created by Naoto Ohshima and Yuji Naka. The title character of Sega's Sonic the Hedgehog video game franchise, Sonic is an anthropomorphic blue hedgehog who can run at supersonic speeds and curl into a ball to attack enemies. He races through levels, collecting power-up rings and avoiding obstacles, as he seeks to defeat the mad scientist Doctor Eggman. Sonic made a cameo appearance in the arcade game Rad Mobile (1991) before making his full debut in Sonic the Hedgehog, released for the Sega Genesis in 1991. Ohshima designed Sonic to provide Sega with a mascot to rival Nintendo's flagship character Mario and used the character to flesh out a prototype programmed by Naka. Sonic was redesigned by Yuji Uekawa for Sonic Adventure (1998), with a more mature look designed to appeal to older players. Sonic is one of the world's best-known video game characters and a gaming icon. His series had sold more than 80 million copies by 2011. Origins and history While Sega was seeking a flagship series to compete with Nintendo's Mario series, several character designs were submitted by its research and development department. Many results came forth from their experiments with character design, including an armadillo, a dog, a Theodore Roosevelt look-alike in pajamas (who would later be the basis of Doctor Eggman's design), and a rabbit (who would use its extendable ears to collect objects, an aspect later incorporated in Ristar). Naoto Ohshima took some of these internal designs with him on a trip to New York City and sought feedback by asking random passersby at Central Park their opinions; of the designs, the spiky teal hedgehog, initially codenamed , led this informal poll, followed by Eggman and the dog character. Ohshima felt that people selected it because it "transcends race and gender and things like that". On return to Japan, Ohshima pitched this to the department, and the hedgehog was ultimately selected as the new mascot. The detailed design of Sonic was aimed to be something that could be easily drawn by children and be familiar, as well as exhibit a "cool" attitude, representative of the United States at the time. Sonic's blue pigmentation was chosen to match Sega's cobalt blue logo, and his shoes evolved from a design inspired by both Santa Claus and Michael Jackson's boots with the addition of the color red, which was inspired by the contrast