|Artwork of a Flying Shell from Mega Man 1|
Flying Shell (or "Mambu", depending on localization) is an enemy from Mega Man 1, introduced in the 1.1 release of Mega Man Maker. It is a reconnaissance robot that keeps flying in a set direction and can only be harmed when their eyes are exposed. When they open their shell, shots spread out in eight directions.
If they appear because of a Spawner, one Flying Shell at a time will appear until it leaves the screen or is defeated. Therefore, Flying Shell Spawners only spawn enemies if there is no current Flying Shell spawned by that same spawner in the screen.