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Theorem is a Decepticon Mini-Con who transforms from a torpedo into a Monkey-like robot.
Theorem and his partner Axiom-with whom he often bickered-were assistants to the volatile Simacore and were imprisoned along with him aboard the Alchemor. They escaped after the ship crash-landed on Earth, and attempted to secure components for their master's plans. They engaged Bumblebee's Autobots in battle and succeeded in capturing Bee and Strongarm, but were then defeated by Grimlock.