Mousubeil

Mousuberu (マウスベール) is a small robot mouse enemy introduced in Mega Man 5. They often slide low on the ground, making it difficult to hit them, but a charged shot or special weapon can reach them if Mega Man is on the same ground level as them, or shot from a different ground level if possible. It has minor appearances in Super Adventure Rockman and Mega Man: Upon a Star.

Trivia

 * Mousuberu is a combination of the words "mouse" and the Japanese word "suberu", which means to slide.