Wailmer

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 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 swims with its mouth open and eats tons of food a day, such as Wishiwashi. 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. On rare occasions, pods can be seen washed up on shore due to memories of once living on land. Dhelmise along with Sharpedo are natural predators to Wailmer.

In The Great Eight Fate!, a Wailmer was part of Juan's Sootopolis City Water Exhibit. It and Juan's other Pokémon were captured by Team Rocket, but they all worked together to escape.

In Island Time, a Wailmer befriended Robin and eventually evolved into a Wailord in order to transport him, Ash, and his friends to a ship heading to Ever Grande City. However, Robin later decided that he wanted to go back to the island he was living on.

In Pruning a Passel of Pals!, a Coordinator's Wailmer competed in the Battle Stage of the Wallace Cup. It went up against Dawn's Buneary and lost, allowing Dawn to advance forward in the Contest.

In Leading a Stray!, a Wailmer was trapped in the sewers, but it was rescued by Ash, who later helped it rejoin its family in the ocean. It evolved into a Wailord in the same episode.

In ''Yo, Ho, Ho! Go, Popplio!'', Professor Kukui, Kiawe, and Sophocles used two Poké Ride Wailmer to travel around Melemele Island.

In The Island Whisperer!, a Wailmer was attacked by a Bruxish's Psychic powers and was subsequently stuck in-between a rock formation in the sea.