Mamoswine

It flourished worldwide during the ice age but its population declined when the masses of ice began to dwindle.

When the temperature rose at the end of the ice age, most Mamoswine disappeared.

This Pokémon can be spotted in wall paintings from as far back as 10,000 years ago. For a while, it was thought to have gone extinct.

It looks strong, and that’s exactly what it is. As the weather grows colder, its ice tusks grow longer, thicker, and more impressive.

This species reached its zenith during the period known as the ice age. I suspect that Hisui's frigid climate is in harmony with Mamoswine's constitution, thus awakening hidden potential.