Unleasher

Unleashers are creatures from the Generation 1 continuity family.

The unleashers are a primitive and telepathic lifeform alien to the Transformers.

Fiction

Story of Binaltech

In a major battle on Cybertron, Megatron used the unleashers to mount a telepathic attack the Dinobots. Their abilities reduced the Dinobots into utterly savage beasts that attacked fellow Autobots, forcing their comrades to shut them off. Due to their apparent useless against vehicular Transformers, Wheeljack had Grimlock's mind transferred to a Binaltech body on Earth. Beast in the Machine