Hottalook

Hottalook (ホッタルック) is an enemy from Mega Man Zero 2 that only appears in the Crystal Cave, Sage Harpuia's stage. When Zero reaches the part where there is a floor of spikes with invisible platforms, a Hottalook appears. It changes color according to the color of the platform below it. When it is struck it releases miniature versions of itself. It will also illuminate the area below it, allowing you to see where the platform is and isn't. If enough of its miniature versions are destroyed, they drop a Cyber Elf.

Etymology
Its name is probably a combination of the words, "hotaru (ホタル, Japanese for firefly)" and "look".