Sonic the Hedgehog different media including animation, comic books, and a Hollywood film. The first "Sonic" game, "Sonic the Hedgehog", is a platform game released in 1991. Players control the anthropomorphic blue hedgehog Sonic, who can run and jump at high speeds using springs, ramps, and loops. Sonic must stop Dr. Robotnik from taking over the world using the Chaos Emeralds. "Sonic the Hedgehog 2" (1992) increased the overall size and speed of the series' gameplay and was the second best-selling Genesis game. It introduced Sonic's sidekick and best friend, Miles "Tails" Prower, who followed Sonic throughout the game, and allowed a second
Sonic the Hedgehog (character) on this basic attack and two of these enhancements have become mainstays of his: the Spin Dash which was introduced in "Sonic the Hedgehog 2" and involves Sonic spinning on the spot before blasting off at full speed, and the Homing Attack, officially introduced in "Sonic Adventure", in which Sonic dashes toward a target in midair. Sonic's only weakness is that he cannot swim, sinking like a rock if plunged to a deep body of water. The only exception is that he can swim in the Sonic the Hedgehog Adventure Gamebooks. When the seven Chaos Emeralds are collected and used,