Plot of part: The Robotnik of Mobius has capsured (classic) Sonic and threw him through a time portal. But after this a dark spirit attacks Robotnik (himself). As for (classic) Sonic he was thrown into the future but he descovers something... he's not on Mobius! Someone meets up with 'em and has a chat with him for a minute. About a minute later the same guy who chatted with (classic) Sonic met up with with Sonic (but modern). He said he saw him a minute ago but Sonic got confused. And the things start getting weird...
