Shepherd is one of many power-enhancing Mini-Cons scattered across Earth. A member of the Purple Mini-Con Team, when Powerlinxed to a larger Transformer, Shepherd activates a Mini-Con detection system which manifests as glowing spheres against a monochrome background. This enables Transformers to locate hidden Mini-Con storage panels through low visibility conditions, even through solid rock or metal.
Transformers Playstation 2 Game
Shepherd's storage panel was discovered on a small island off the north coast of Megatron's Pacific island base, near an abadoned human settlement. Following the defeat of Megatron, he and the other Mini-Cons returned to Cybertron and helped form the Matrix Cannon, Nemesis Shield and Vanguard Booster, giving the Autobots the power needed to destroy Unicron.