Big Steely

Big Steelies are large metal balls that are enemies in Super Mario 64. They do damage upon contact, and roll around areas or down paths. They appear in Bob-omb Battlefield, Tiny-Huge Island and Battle Fort.

The Big Dud
Before the first mission in Bob-omb Battlefield is completed, there are 2 Big Steelies at the base of the mountain. When Big Bob-omb is defeated, 3 appear. a Bob-omb Buddy says that Big Bob-omb is "nothing but a big dud now!"