Ammoner

Ammoner (アンモナー) is an ammonite enemy in Mega Man 8 and Mega Man & Bass. When Mega Man shoots them with a shot to the face, or a charge shot regardless of direction, it is sent rolling down a slope, crushing enemies that are in the way, and explodes upon crashing into a floor or wall. These appear in the opening stage and Aqua Man's stage in Mega Man 8, as well as Pirate Man's stage in Mega Man & Bass.

Trivia

 * This is one of the few Mega Man 8 enemies that have artwork.