Metal Sonic Quest 2: Return and Revenge

Storyline

In a time not too long ago, Dr.Ivo Robotnik constructed a robot that could mimic the abilities of Sonic the Hedgehog. But to Robotnik's dismay the robot was struck by a virus and ended up destroying his master's plans for world domination... For a while Eggman (Sonic's nickname for the doctor) decided to forget about using robotic clones of Sonic for his plans. But with his recent failures, Eggman has decided to try once again. Now that he knows what he should've known back then.

Source: IGDB