Born as the result of a scientific research project aboard the Space Colony Ark, Shadow was designed ... the black hedgehog was freed by Dr. Eggman and has fought with both him and Sonic time ...
We knew it would be taking pieces of the Dreamcast game, such as introducing Shadow the Hedgehog and delving into ... the grandfather of series antagonist Eggman, is a bit of a wildcard in Sonic ...
Sonic, Tails, and Knuckles are coming back to the big screen soon in Sonic the Hedgehog 3. In that film, written by Pat Casey and Josh Miller, the trio will face a new enemy, Shadow the Hedgehog ...
and Sonic The Hedgehog (2006) confirms in a side story that Shadow’s IQ is 200. It's not that Sonic is dumb, but the games make it clear that Shadow is the smarter of the pair.