Theorem was one of the many Decepticons imprisoned aboard the Alchemor. Along with Simacore and Axiom, he escaped when the ship crashed on Earth. Theorem and Axiom accompanied Simacore's raid on a particle research facility, and were deployed in the initial clash with Bumblebee, Strongarm, and Grimlock, although they both overshot their targets. Theorem wound up fighting Bumblebee. Simacore later used them to try and claw through a door, although neither of them could get through. Instead, the two Mini-Cons strapped Strongarm and Bumblebee to a particle accelerator cannon, then returned to Simacore. Along with Simacore, they were eventually defeated by Grimlock and returned to a stasis pod.