Robotnik's Oil-Publisher: LadybirdISBN: 0-7214-1740-XDate: 1994 Blurb: Sonic the Hedgehog and Ladybird join forced to bring you some fast, furious, frantic and fun-filled radical action!Summary: Robotnik discovers potential oil underneath the Aquatic Ruins Zone and sets up multiple rigs to mine for it. Annoyed at this, Sonic puts up a fight…