Heli Buton (ヘリブトン,Heributon?) is a flying robot created by Dr. Light shaped like a Hercules beetle. They were modified by Dr. Wily and appear as enemies in Mega Man 6, being native to Plant Man's stage. Heli Butons come down from the trees and fly slowly toward Mega Man.
Jet Buton (ジェットブトン,Jettobuton?) is an improved Heli Buton that appears near the end of Plant Man's stage. It makes a beeline straight toward Mega Man and doesn't stop going.