The genius scientist of evil which is proud of his IQ of 300. He createst many problems for the world by his scientific power in robot engineering fearfully with the talent which the he should. That earnest wish to conquer this world, to create the utopia of himself, it is to build the "Egg Man Land". As for Sonic, appearing as usual, Dr. Eggman sees him as a just enemy. Although he changes the usual plan and changes the item, he sends the assassin to Sonic and challenges him, but as of now Eggman has always been completely defeated. Just this time, what kind of plan probably will be used...! ?