No lava appears, and secret passageways scatter the course. This stage has been made easier from Sonic the Hedgehog. Eggmans are in an after-credits scene and get in a humorous argument. Chaos: Chaos has been angered by Metal Sonic, who has sent him back in time to distract Sonic.Jet the Hawk: Like Rouge and Espio, Jet is a fake created by Metal, and is sent to defeat Sonic in the Wii U version.Mecha Sonic: Mecha was rebuilt by Metal Sonic, and is sent to defeat Sonic in the 3DS version.Rouge the Bat: Rouge challenges Sonic, but it is later revealed it was a fake created by Metal Sonic.The player cannot use Metal Sonic, however, but plans for him to be playable was a beta element.
Sonic the Hedgehog: Sonic is the playable character, who is gifted with extreme speeds and tall jumps.The robot is defeated, and the three Sonic go back to their own worlds. It is revealed that an unknown villain has brought them to this world, and that they must get back to their own world. The three Sonics collects the Chaos Emeralds from the bosses, then sees the mastermind of this plot, Metal Sonic. Metal uses the negative energy of the emeralds to transform into a super form, and the two Sonics follow him as Super Sonic. Meanwhile, the modern Sonic with Tails help eggman evil plan, and black hole sucks them into the same grey world. Meanwhile, Classic Sonic runs though Station Square, older then when he was in Sonic Generations, and suddenly a black hole sucks everything into a land of grey. Some noises are heard as a red eye glows in the room.