After his failed attempt to destroy the world, Doctor Eggman was robbed of everything by Sonic and his companions, including his destroyer Emerl. Fortunately, he managed to escape, and his hatred seemed to be heavier than before. With his return this time, he brought with him another robot called Gemerl, an upgraded version of Emerl, improved on technology and power. Sonic and his friends are his first targets because deep down, he understands that. If they exist, then the plan cannot succeed. Amy, Knuckles, and Cream have been kidnapped, and this means that Doctor Eggman has sent Sonic an official challenge. But, with the current power of Sonic and Tail, it is difficult to defeat Eggman and Gemerl. It seems that they need to borrow the power of the Emeralds that are hidden in the 7 dungeons they are about to face next.
