Spinner, Sonic Advance 2

E-06 Spinner is a rounded airborne E-Series robot created by Dr. Eggman. It has appeared in numerous Sonic titles since its debut in Sonic Adventure, usually serving as a sort of aerial stepping stone for Sonic who can use his homing attack on rows of these enemies to progress to new areas. Their bodies are surrounded by blades that spin rapidly, but its rare that they actually cause any harm.