As part of its ongoing efforts to promote every single Pokémon out there, The Pokémon Company has shared special content dedicated to Cobalion:
Did you know? It has a body and heart of steel. Its glare is sufficient to make even an unruly Pokémon obey it. It has a body and heart of steel. It worked with its allies to punish people when they hurt Pokémon.
Source: The Pokémon Company