Sunstorm is seen in the first episode along side two other seekers. He shot at Bumblebee and Wheeljack.
Sunstorm is an experiment of Shockwave's to put a solar-powered fusion reactor into a Decepticon. He possesses the power to manipulate electromagnetic energy.
After Megatron was defeated, Sunstorm was apart of the Decepticon's who had escaped earth. Sunstorm now sits with another seeker, Acid Storm, on a ship full-time weakened because they do not have any energon.
Transformers:Revenge of the Fallen The video game
Sunstorm is a DLC on the PS3 and 360.