Every plot and scams Eggman has ever done over the past years have failed time and time again. Now he has another idea, an idea of merging his past failed robots and evil final bosses into one Mega Ultra super ultimate robots. And by doing that he needs the chaos emeralds to create the fusion, lucky Sonic Shadow & Silver won't let that happen. Little did they know they too will get the taste of a fusion experience, in a 3 in 1 experience.