Suicune

Suicune is a slim, quadrupedal, blue, mammalian Pokémon with white, diamond-shaped markings. Its face and underside are white as well. Suicune has a thick, purple mane that resembles the aurora borealis and two white, streamer-like tails that wave forward. It has a long, white snout. Suicune has a large, hexagonal, cerulean blue crest on its forehead with two prongs on either side of the base. It has red eyes, a small tuft of fur under its chin, and small paws with white paw pads.

150 years ago, the Brass Tower in Johto was hit by a lightning bolt, causing it to catch on a huge fire and would be later put out by a sudden downpour. Three unnamed Pokémon perished in the fire, but the Legendary Pokémon resurrected them as the legendary beasts. Suicune has the power to walk across water and purify dirty water with one touch. It travels across grasslands in search of water to purify by following the north wind. Northern winds always seem to blow stronger in its presence. In Pokémon Crystal, Suicune is said to be the closest of the Legendary beasts to Ho-Oh and shares a cooperative bond with . Suicune's personality is said to be heroic, serious, and calm during dangerous situations, as depicted in Drifloon On the Wind! (DP028). Suicune is believed to be both the embodiment of the north winds and compassion of pure spring waters. Suicune loves Suicune Treats made by Snacksworth, who once encountered and rode with it in the past. As mentioned in Pokémon Sleep, Suicune can be observed sleeping deeply in locations where the water is clean. When it awakens, it will start racing around the world once more, following the north wind to purify fouled water. Suicune is known to enjoy eating Suicune Biscuits and can be lured over to a sleeping spot using the Suicune Incense.

(Source: Bulbapedia)