Sonic treats Shadow as a friend, but Shadow would rather continue in his mission to regain his memories than put up with his friendly and adventurous nature.
The story of Shadow is about unconvering his past and true origin, and depending on the player actions, Shadow can become a brave-hearted hero, , or.
Shadow then states that he has left his past behind him and has become determined to destroy Black Doom.
In one stage, you help Sonic; in the next stage, you can help Black Doom; in the next, you can help.
Shadow was created as the Ultimate Life form in a secret lab by Professor Gerald Robotnik.
Despite his best efforts, Black Doom failed, and Shadow protected the human race by killing Black Doom.