First Evolution: After years of living in the cold, antifreeze has replaced the blood of (insert pre evo name here). This Pokemon thrives in deep snow and blizzards.
Second Evolution: After gathering victims frozen by blizzards for storage, this pokemon can survive for months without foraging again. This pokemon is seldom seen far from active glaciers.
Final Evolution: The forelimbs of this pokemon have become ice cannons, enabling it to freeze victims on demand. It is often aggressive, having a voracious appetite for newly frozen victims.