Get 4 apples and drop them 1 at a time in front of a Freezer in Galepeak. Doing that gives u a quest I think where u have to go to Argan Village and talk w Roc. Then you’ll have to do Moonlight Monastery and kill Tere (tree woman) to get an apple basket. The apple basket is on >> of the observatory in a bookshelf. Completing that quest gives the Freezer pet :)