Bikky

Bikky (ビッキー) is a large hopping press robot that was built for land grading. Bikkys appear as enemies in Mega Man 3 and Mega Man II and they are invincible while grounded. Mega Man can only hit them when they're with their eyes open while in the air. They are mainly found in Gemini Man's, Needle Man's, and Hard Man's stage. They also appear in the Doc Robot version of Shadow Man's stage and in the third Wily Castle stage.