Sonic the Hedgehog is Tails's best friend and the mascot of SEGA. The first Sonic game, Sonic The Hedgehog was released on June 23rd,1991. For 20 years a variet of Sonic games have been released. Sonic is the main character in the Sonic series and is 21 years old. He is easily known for his blue color, spikes, and most of all, his super speed.