The show takes place ten years after the finale of Armada, opening in an age of peace on Cybertron and Earth which is destined not to last long. Energon pits the Autobots against an array of villains: the reborn Megatron , the barely functional Unicron, and the mysterious Alpha Q and his Terrorcon minions.

Katsuyuki Konishias Grand Convoy (voice)
Mitsuo Iwataas Roadbuster (voice)
Kohsuke Toriumias Hotshot (voice)
Nobutoshi Cannaas Inferno (voice) / Laserwave (voice)
Koji Yusaas Ironhide / Irontread (voice)
Nobuyuki Hiyamaas Skyfire (voice)
Daisuke Kishioas Kicker Jones (voice)
Junichi Endoas Galvatron (voice)
Isshin Chibaas Sandstorm / Snowstorm (voice)
Nobuo Tobitaas Nightscream (voice)