Tart Turtle
From Sonic Retro
Tart Turtle is the boss of Great Turquoise Zone. It floats around in a straight line waiting for you to attack it's belly. After you hit it enough times it will fly up at which point the turtles with springs from Great Turquoise Zone will walk on screen where you must jump onto the spring to reach the boss. If you hit the boss before pressing a button to return to ball form, you will get hurt.
