Sonic’s occasionally gun toting rival Shadow the Hedgehog is in Sonic Generations too and he has Chaos Emerald powers. Shadow can use Chaos Control to turn into an arrow of energy and blaze past Sonic. In both versions of Sonic Generations players will race Shadow, but the level design is different.
Sonic Generations for PlayStation 3 and Xbox 360
Sonic Generations for Nintendo 3DS
Sonic Generations for consoles has Speed Highway from Sonic Adventure in the game.
The 3DS release also has a cityscape, but this stage is from Sonic Adventure 2. Players will race Shadow on Radical Highway.