Arc Weldy, known as Arc Hander (アーク・ハンダー Āku Handā) in Japan, is a small welding robot from Mega Man 11, appearing as an enemy in Impact Man's stage. It rolls across the floor and uses its welding torch to burn small pools of molten metal onto the floor, which will damage Mega Man on contact. These molten pools can be removed by Tundra Storm and Acid Barrier.
Mega Man 11 Gallery
This welding robot has a slightly cheaper CPU, so it tends to weld anything nearby if left unattended. However, you can't help but wonder about that sad look in its eyes...