User blog comment:Ryushusupercat/A New RP Idea/@comment-1617565-20111017102523/@comment-1296654-20111017154114

A group of Mobians team together to defeat a mutual foe (Robotnik, obviously), who traps them in an altered version of his time travel machine seen in Sonic the Hedgehog '06. The machine sends those Mobians to the alternate dimension and things go on from there, I guess.