>>43265561Bluff Oysters live in Cold Water, so yes, Oysters can survive in Cold/Ice. Which is quite a few degrees colder than the typical Oyster. In fact most adult oysters can survive near freezing temperatures for short bursts. You're also arguing that Shellder/Cloyster haven't adapted to the Ice Caverns and various other places in which to survive. If Alola/Galar Pokemon and varying species can exist based on their environments and evolution, then the same can be said for virtually all Pokemon barring a select few due to technology, ghosts, etc.
