Astro Zombieg

Astro Zombieg (アストロゾンビーグ) is the frightening zombie robot in Mega Man 7, and is (appropriately enough) only in Shade Man's stage. They emerge from coffins; in the first part of the stage (as a nod to the zombie horror movies) these coffins rise from the ground to unleash them. When shot, some of their parts fall off (sometimes an arm or even the head). They need to be dismantled completely to be destroyed. Pharaoh Man summons them in Mega Man 2: The Power Fighters. The mini-boss for Shade Man's level was originally some Astro Zombiegs but Capcom put in Pumpking at the last minute.

Trivia
Astro Zombieg is a reference to the zombie enemies from the Ghosts 'n Goblins games.