Shadow

An anthropomorphic black hedgehog, Shadow shares design traits and attributes with Sonic the Hedgehog, and serves as Sonic's principal rival throughout the franchise. Described as an antihero, Shadow is portrayed as having noble intentions and a compassionate heart, but is standoff-ish with the people he encounters and often willing to fight anyone who comes in the way of his objective. His solemn demeanor and antagonistic traits put him at ideological odds with Sonic, though the two have a begrudging respect for each other and frequently team up for the greater good. (BTW this takes place after Sonic movie 3. It's just a concept)