Wailmer stores water inside its body, which it expels through its nostrils to startle people. When storing water in its body, it can turn into a bouncing ball. The more water filling its body, the higher it can bounce. It becomes lethargic when it is dry. It eats tons of food a day. It lives in the sea, and can only live on land for a short amount of time. It occasionally bounces onto the beaches to play.
Wailmer is a spherical whale Pokémon with no tail. It has a dark blue topside and a tan underbelly with grooves. It has two fins that have finger-like appendages, baleen plates that resemble teeth, and a blowhole on the top of its head.
Wailmer is obtainable by having a Lapras at Level 30.