Its a crossover of massive proportions! The Blue Blurs battle with Dr. Eggman is upended by the arrival of two enormous monsters emerging from a humongous fissure in reality. The magnificent Mothra and the menacing Mechagodzilla carry their vicious battle into Sonics world, and its fate now hangs in the balance! Is Sonic, with the help of his loyal friends Amy and Tails, fast enough to halt the citys frantic destruction? And why is Eggman so happy about this whole big mess?Wait, is that Eggman now? How can he take over a soliciFrom the files of me, Dr. Eggman! That petulant blue pipsqueak is making my existence absolute torture againinterrupting my crucial research on the beasts from the dimensional fissure! I simply MUST unlock the secrets of these giant monsters and use them to create somethingeggtastic.