Aurorus is a Rock/Ice typed Pokémon that is the evolution of Amaura, which evolves at night. It is a Tundra Pokémon.
Like Amaura, it's pre-evolution, Aurorus has a long, tall neck, and a large color changing membrane on it's head. It is mostly blue in color, with a light blue colored underbelly and neck, and it also has a long blue tail at the back. Aurorus also has eight ice diamonds on the left and right sides, seven more than Amaura. Aurorus is slightly taller than Tyrantrum.
Like Amaura, Aurorus has a yellow color changing membrane on its head, which changes depending on Aurorus's emotions. It will change to blue when Aurorus is sad, to green when it is happy, and to red when it is annoyed or angry.