In Ambrette Town, our heroes run into the journalist Alexa, who’s working on an article about an amazing discovery at the Fossil Lab. She invites Ash, Serena, Clemont, and Bonnie to come with her, and they all check out the lab’s collection of fossils from Pokémon that lived long ago and are now extinct. The fossils aren’t the amazing discovery, though—the researchers take our heroes into a special frozen habitat inside the lab, where they meet a living Amaura and Aurorus that were restored from fossils discovered in the ice!
After they leave, Team Rocket swoops in to steal Amaura for the Boss—which is a big problem, because Amaura grows weak if the temperature is too warm. But Aurorus is able to track Amaura through its cries, which create an aurora in the sky, and it leads Ash and the others straight to Team Rocket. The villains are defeated, Amaura is rescued and brought back to the lab, and everyone celebrates the victory with a giant snowball fight!