Sonic World Adventure Rush!

"Ahh! Good old Green Hill!" Sonic mused to himself. This was his old stomping ground after all, and he wasn't about to let its citizens down now.

Pausing to enjoy the cool breeze blowing by, Sonic rubbed a finger under his nose in thought.

"Johnny said something about Badniks roaming around here. But that gunk in the ocean looks serious too. Maybe Moto Bug has some answers!"