The Pokémon (ポケモン Pokemon) franchise has 721 (as of the release of Pokémon Omega Ruby and Alpha Sapphire) distinctive fictional species classified as the titular Pokémon. This is a selected listing of 67 of the Pokémon species, originally found in the Ruby and Sapphire versions, arranged as they are in the main game series' National Pokédex.
Wailmer (ホエルコ, Hoeruko in original Japanese language versions) was one of the "preview" Pokémon to the fourth generation of games, cards, and anime, having been released before the official release of the GBA versions. It's native to Pokémon Ruby and Sapphire, Pokémon Emerald, Pokémon Diamond and Pearl, Pokémon Platinum, Pokémon Black and White, and Pokémon Black 2 and White 2. The shiny version of it has light purple where it's normally blue.
The name Wailmer is derived from the words whale, wail, mer (the French word for seia), and possibly toddler, due to its playful, childish demeanor. Its Japanese name, Hoeruko, is derived from the Japanese transliteration of the English word whale (ホエール hoēru) and the Japanese words for to cry (吼える hoeru) and child (子 ko). Unlike an actual whale, a Wailmer will spout water from its nose instead of a blowhole on its head. Wailmer will often land on beaches during sunny days and bounce around like a beach ball.