History of Sonic
Sonic's greatest strength is his running speed, being known in the game's universe as the world's fastest hedgehog. Many of his abilities are variations on the tendency for hedgehogs to roll into tight balls for protection with the addition of spinning his body. Since his introduction in 1991's Sonic the Hedgehog, Sonic's primary offensive maneuver is the basic "Spin Attack" (or "Sonic Spin Attack"). Later games in the series expanded 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 reason for this is because Yuji Naka had a misunderstanding about hedgehogs not being able to swim. The only exception is that he can swim in the Sonic the Hedgehog Adventure Gamebooks. When the seven Chaos Emeralds are collected and used, Sonic transforms into "Super Sonic" , a faster and invulnerable version of himself that can fly. In Super Sonic form, Sonic's irises turn red and his body becomes golden.