Tails is an NPC(non playable charater) unless you play two player mode.
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Other than the extra abilities in several games like Sonic Unleashed, or Sonic Colors, Sonic doesn't 'gain' powers. He always had his famous speed. Along with the ability to use the chaos emeralds to turn into Super Sonic.
Press left or right on the D-pad and watch the energy gauge. A colored icon should appear and Sonic's shoes will change color. There is sometimes a delay, so just press left or right repetitively until it works. You can use the ability with R2 (Or for the Xbox, the button in it's place.)
you dont it comes with it you just have to put two controlers in to use it
on a ps3 press (Square) When near a line of rings if u have to jump press x then square
No because it is also a sonic game. So you can do Spin Dashes, homing attacks and punches todefeat your enemies