I support the idea that those are owned by Eggman, they clash with the environments and they are all over the place.
He probabbly uses them as storage, and probabbly after some time he learned that sonic also used them, so he made fake ones, his Eggman Monitors, to get him.
He probabbly uses them as storage, and probabbly after some time he learned that sonic also used them, so he made fake ones, his Eggman Monitors, to get him.

