Art by Nigel Dobbyn
Not to be confused by Sidney the Pirate, a named member of the Sky Pirates.
Sidney is a member of the Emerald Hill folk who once made his home in the Floating Island's Mushroom Hill Zone. He was one of the citizens taken from his home by Doctor Zachary's Guardian Robots and installed on Doctor Robotnik's Biological Computer. After being saved by the electromagnetic pulse from the Black Asteroid, Sidney angrily confronted Knuckles the Echidna before he could chase down his evil echidna counterpart. The Emerald Hill resident spoke for the rest of his people when he stated he wished to return home, appreciating Knuckles' gesture to let them stay but ultimately fed up of being fugitives. Thanks to Sidney's convincing speech, Knuckles agreed to put off the search and went to the Emerald Chamber with Porker Lewis to lower the island out of the sky.