Kouker Q

Kouker Q (コーカーＱ) is an enemy in Mega Man 5 that was designed after the development of Renbakun. It flies slowly across the screen, but the instant the player is under it, it stalls its engine, folds its propellers, reveals its spikes underneath, and dives like a weight. The spikes don't kill Mega Man in one hit, but they are often placed where platforms drop into bottomless pits. It is found in Gyro Man's stage and the third Proto Man stage.

Trivia
Its name is derived from the Japanese word "kyuukouka", which roughly means "nose dive".

Similar enemies
Enemies similar to Kouker Q:
 * Renbakun
 * Crusher