First Appearance Sonic CD (1993) Shadow is not the first evil counterpart to Sonic to be introduced in the video game series. Predating him by several years is Metal Sonic, a Sonic-resembling ...

With both characters originally debuting in Sonic CD, there’s plenty of speculation that Sonic the Hedgehog 4 could be inspired by this game. While the original Sonic the Hedgehog took ample ...

The inclusion of Metal Sonic may hint at the series closing in on Sonic CD territory. In the 1993 title, Sonic raced through various points in time to stop a 'bad future' ruled over by Eggman and ...