Courage is a small pink dog living in Nowhere.
He isn't brave, despite his name and would really prefer just to sleep by the fire on his owners lap. But nowere attracts hordes of strange creatures, and Courage has to somehow drive them off to protect his owners.
Thomas met Courage when the Highbreed invaded Nowhere. Together, with Silverbolt and Optimus Primal they managed to defeat them as well as their heartless forces.