It is a necklace that makes him control all temples in sonic unleashed.
One day, sonic was trapped in his mind. talking too dark sonic. dark sonic says he will take over sonic's body one day, but of course sonic will be all sassy about it. but dark sonic choke sonic's neck. after that, tails appear out of nowhere. and dark sonic almost killed him, but when sonic had enough, he broke the glass that separated them. the fight was epic. but as more super sonic was angry, the more power dark sonic gained. then he turn into feet a way sonic. supersonic was about to lose, but he realized something. feet a way sonic was hurt. so he gave him a hug and tolled him that he understands the pain he when't though. but feet a way sonic turned against him and then sonic gotten lost in his mind, forever. then feet a way sonic turned into sonic exe. tails instantly exit out of sonic mind. when he went out, amy was there. he tolled her that he couldn't save sonic! ( to watch the video where i found it, go to youtube and search for "save sonic").
Tails killed Sonic in self-defence because when Snively injected that formula into Sonic's arm, it turned Sonic evil. If Tails hadn't have stabbed Sonic, he would have been choked to death, so it was a lose-lose situation, anyway. And I'm sure that the last thing Tails wanted to do was kill his best friend. I'm pretty sure that Tails killed Sonic because he had to. Sonic is the fastest thing alive, he always wins, and he can become Super Sonic if he has the Chaos Emeralds. Tails had to kill Sonic because if Sonic is a bad guy then everyone may as well kill themselves. No, he didn't want to, but Tails can't technically be choked, as he has no neck.
Normal Sonic, Super Sonic, Hyper Sonic, Eco Sonic, Polar Sonic, Solar Sonic, Ultra Sonic, Dark Sonic, Darkspine Sonic, and Excalibur Sonic. (Note that these are forms of Sonic the Hedgehog)
the sonic forms are super sonic, dark spine sonic, excalibar sonic, calliburn sonic, ultra sonic, solar sonic, eco sonic and ice sonic hyper sonic negative sonic
Dark sonic Hyper sonic Normal sonic Metal sonic (created by Eggman ) Werehog sonic Fire sonic
As of 2011: Sonic the Hedgehog Sonic the Hedgehog 2 Sonic the Hedgehog CD Sonic Spinball Sonic the Hedgehog 3 Sonic & Knuckles Sonic Labyrinth Sonic 3D Blast (Flickie's Island) Sonic R Sonic Adventure Sonic Pocket Adventure Sonic Shuffle Sonic Adventure 2 Sonic Advance Sonic Advance 2 Sonic Battle Sonic Heroes Sonic Advance 3 Shadow the Hedgehog Sonic Rush Sonic Riders Sonic the Hedgehog (2006) Sonic and the Secret Rings Sonic Riders Zero Gravity Sonic Chronicles: The Dark Brotherhood Sonic Unleashed Sonic and the Black Knight Sonic the Hedgehog 4: Episode 1 Sonic Free Riders Sonic Colours Sonic Generations
The Sonic the Hedgehog game franchise has these games: Sonic the Hedgehog, Sonic the Hedgehog 2, Sonic the Hedgehog Spinball, Sonic the Hedgehog 3, Sonic & Knuckles, Sonic Adventure, Sonic Adventure 2 Battle, Sonic Advance, Sonic Mega Collection, Sonic Heroes, Sonic Mega Collection Plus, Sonic Rush, Sonic and the Secret Rings, Sonic the Hedgehog (mobile), Sonic Unleashed, Sonic & Sega All-Stars Racing, Sonic Colors, and Sonic Generations.
Four. Adventures of the Sonic the Hedgehog Sonic SatAM Sonic Underground Sonic X
Nope,Hyper Sonic is better then Super Sonic and Sonic
Sonic the Hedgehog (1991) Sonic the Hedgehog (8-bit) Sonic the Hedgehog 2 Sonic the Hedgehog 2 (8-bit) Sonic Chaos Sonic Spinball Sonic CD Sonic the Hedgehog 3 Sonic & Knuckles Sonic Drift Sonic Triple Trouble Sonic Drift 2 Sonic 3D Blast Sonic Blast Sonic the Fighters Sonic R Sonic the Hedgehog Pocket Adventure Sonic Adventure Sonic Shuffle Sonic Adventure 2 Sonic Adventure 2 Battle Sonic Advance Sonic Advance 2 Sonic X (Leapster) Sega Superstars Sonic Battle Sonic Advance 3 Sonic Rush Sonic Rush Adventure Sonic Pinball Party Sonic Adventure DX Sonic Heroes Shadow the Hedgehog Sonic Riders Sonic the Hedgehog (2006) Sonic Rivals Sonic and the Secret Rings Sonic Rivals 2 Mario & Sonic at the Olympic Games Sonic Riders: Zero Gravity Super Smash Bros. Brawl Sonic Chronicles: The Dark Brotherhood Sonic Unleashed Sonic and the Black Knight Mario And Sonic At The Olympic Winter Games Sonic & SEGA All-Stars Racing Sonic Classic Collection Sonic the Hedgehog 4 Episode I Sonic Free Riders Sonic Colors Sonic Generations Mario And Sonic At The 2012 London Olympic Games Sonic The Hedgehog 4 Episode II Sonic The hedgehog 4 Episode Metal Sonic & All Stars Racing Transformed
Sonic the Hedgehog Sonic the Hedgehog 2 Sonic the Hedgehog 3 Sonic & Knuckles Sonic the Hedgehog Spinball Dr. Robotnik's Mean Bean Machine Sonic 3D Blast Sonic CD Sonic Eraser SegaSonic Cosmo Fighter (Japan only) Segasonic the Hedgehog (Japan only) Sonic Chaos/Sonic & Tails (Japan only) Sonic Triple Trouble/Sonic & Tails 2 (Japan only) Sonic Drift Sonic Drift 2 Sonic Blast Tails' Skypatrol Tails Adventure Knuckles' Chaotix Sonic Jam Sonic R Sonic Adventure Sonic the Hedgehog Pocket Adventure Sonic Shuffle Sonic Adventure 2 Sonic Mega Collection Sonic Advance Sonic Advance 2 Sonic Advance 3 Sonic Heroes Shadow the Hedgehog Sonic Riders Sonic Riders: Zero Gravity Sonic Free Riders Sonic Rush Sonic the Hedgehog (Xbox 360/PS3) Sonic Rivals Sonic and the Secret Rings Mario & Sonic at the Olympic Games Mario & Sonic at the Olympic Winter Games Sonic Unleashed Sonic Chronicles: The Dark Brotherhood Sonic and the Black Knight Sonic Classic Collection Sonic the Hedgehog 4 Sonic Colors