A Diagnostic Drone is a type of autonomous drone which generally assists Transformers in performing administrative or technical tasks. They have some measure of artificial intelligence and are small, roughly ovoid devices with one visual sensor, two clawed arms, and two "wings". They can hover or fly. Diagnostic Drones are explicitly depicted as sparkless. Several have been shown to have the ability to speak and use advanced experimental technology, but only one is known to have had apparent emotions and a sense of humor; that unit was either a true artificial intelligence, or a very good simulation of one.