Fly Boy

Prop-Tops (called "Flyboys" in Japan) are weird pogo-like robots in Mega Man 2. They appear in Crash Man's stage, Heat Man's stage, and in the second section of Dr. Wily's castle. They appear infinitely from the top of the screen. After landing, they levitate up slowly for a bit, try to pounce Mega Man swiftly, and repeat.