Suicune is a slender, four-legged, blue, mammalian Pokémon adorned with white diamond-shaped markings. Its face and underside are also white. This Pokémon features a thick, purple mane resembling the aurora borealis, alongside two white, streamer-like tails that flow forward. It boasts a long, white snout. On its forehead lies a large, hexagonal, cerulean blue crest with two prongs extending from either side of its base. Suicune has red eyes, a small tuft of fur under its chin, and tiny paws with white paw pads.
Endowed with the ability to traverse water and cleanse contaminated water with a single touch, Suicune roams grasslands in pursuit of water to purify, guided by the north wind. The northern winds appear to intensify when Suicune is near. In Pokémon Crystal, it's noted that Suicune shares a close relationship with Ho-Oh among the Legendary beasts and maintains a cooperative bond with the Unown. Described as heroic, serious, and calm during crises, as seen in "Drifloon On the Wind! (DP028)", Suicune embodies both the essence of the north winds and the compassion of pure spring waters. It has a fondness for Suicune Treats crafted by Snacksworth, who once encountered and rode with this Pokémon in the past. Walking Wake, which bears a resemblance to Suicune, is thought to be its ancient ancestor.
In Pokémon Sleep, it's mentioned that Suicune can be found sleeping deeply in areas where the water is pristine. Upon waking, Suicune resumes its journey around the world, following the north wind to purify polluted water. This Pokémon enjoys consuming Suicune Biscuits and can be attracted to a resting spot using Suicune Incense. Suicune exhibits three distinct sleep styles: Energy-Storing Sleep, Meditative Sleep, and Northern-Wind Sleep.
(Source: Bulbapedia)
