FusionDex

Walrill's ball at the end of its tail contains a large amount of cold air, the length of the tail connecting to its lungs. By squishing the orb, Walrill channels the cold air to breathe a freezing mist to defend itself with.

Its tail, which is packed with nutrition, is very bouncy like a rubber ball. To protect its herd, the leader battles anything that invades its territory, even at the cost of its life.