C.L.U.T.C.H.

The Cybertronian Linked Ultra Tactical Combat Helper (C.L.U.T.C.H.) is a small drone developed on Cybertron. It is capable of dutifully accompanying its users into the battlefield, where they attacked nearby enemies. When inactive, they resemble sphere shaped devices, which, when activated, floated across the environment in order to attack its targets.

Transformers: War for Cybertron
Near the end of the Great War between the Autobots and Decepticons, select Transformers had the ability to spawn sentry drones.

Transformers: Fall of Cybertron
Later in the war, C.L.U.T.C.H. drones were more widely available and able to be purchased through Teletraan-1 terminals.