Small Fry Guy
From the Super Mario Wiki
Small Fry Guys are the remains of Fryguy after he is destroyed in World 4 of Super Mario Bros. 2. To attack, a Small Fry Guy hops towards Mario and his friends, attempting to burn them with its harmful flames. Like Fryguy, Small Fry Guys can be destroyed with Mushroom Blocks. After a Small Fry Guy is destroyed, the remaining Small Fry Guys get progressively faster.