Transformers Armada begins on Earth when three children discover a Pandora's box from the World of Cybertron (the home of the Transformers robots). Unbeknownst to Carlos, Rad and Alexa, they unearth an ancient battle between the Autobot and Decepticon robots when the centuries-old box is opened. The Autobots and Decepticons battle for control over a third race of Transformers, the Mini-Con robots. Historically a dormant group, the Mini-Con robots are now the key to a crucial source of power and when they are connected with other Transformers robots, they have the ability to enhance the strength and power of the larger Transformers.
Transformers: Armada TV Episode Guide :