Doncatch

Doncatch (ドンカッチ) is an enemy in Mega Man V. It is a walking enemy with a mallet on its head, and it attacks by getting close to Mega Man and striking the ground, causing debris to launch up. It appears in Mercury, Jupiter, Saturn, and Pluto stages.

Trivia

 * Its name is derived from the Japanese word "tonkachi", which means hammer.