you HAD to use a sonic 06 six sprite? not Adventure 2 or Generations? Doesn't matter XD Most don't like Sonic 06 though. Awesome job! 2 of my few favorite series in the world mixed into one pic! I'm surprised more of these aren't out there :/
This beautiful render, ruined by flat Sonic's sideways copy+pasted "reflection" makes me cringe. For one thing, we wouldn't be able to see the background through him unless Sonic himself is transparent. The shape of the ball causes a "fisheye" reflection to occur, which Sonic here seems to be immune to. The light sourcing is just barely off, but the choices of render stock were close enough to maintain the illusion there.