
Two months after Sonic Tails and Knuckles' journey in Sonic Universe 1, Robotnik makes a comeback. He reaches out to Shadow for assistance but Shadow refuses after his crushing defeat two months prior. Robotnik is furious and storms off. Determined to make amends Shadow decides to join forces with Sonic and the team to take down Robotnik once more. Now Robotnik has returned more powerful than before! He steals the Master Emerald and vanishes! Join Sonic and his friends in their mission to reclaim the Master Emerald!