Grimlock was born in a Decepticon lab as a warrior who would run on artificial intelligence instead of an ember, but Megatron ordered his deactivation after his violent tendencies emerged and overrode his logic subroutines. He was put into storage with every intention of never using him again. However, when Optimus Prime heard of his creation, he stole and reactivated Grimlock. Given the chance to engage in the violence he yearned so much for, Grimlock eagerly became Prime's most powerful warrior, not stopping for anything except deactivation, having not a single shred of mercy or self control. "I wish I had a thousand more like him!" says Optimus Prime on multiple occasions.