Repair Drone

From Wikitroid, the Metroid wiki

The Repair Drone was used to maintain SkyTown, but was made obsolete by the Aerial Repair Drone, and production was stopped over 150 years ago; only a handful remain now. Repair Drones are small robots that move around on one large wheel, tending to the mechanical needs of SkyTown with a single "claw" that contains the various tools for their work. When moving, they can be seen "walking" their tool-claw along with their wheel. It is unknown whether this is their main mode of locomotion, or simply for balance. These drones can be shot by Samus, and while they are harmless, the targeting reticule can circle around them, showing that they can be locked on.

[edit] Logbook entry

Metroid Prime 3: Corruption: "The original version of the Elysian Repair Drone. Because of their limited movement systems, these units quickly proved to be insufficient in performing the necessary maintenance duties. Used as a base design, the aerial model was created to address all flaws with the original version. Made obsolete by the aerial model, all production and manufacturing was halted over 150 years ago. Only a handful of these units remain active."