Suicune is sky blue in color, with white rhombuses around the body and a white belly. Suicune has an aquamarine crest on its head which is in the shape of a hexagram. Behind its crest is a purple mane with, supposedly, thick, smooth fur. Two white, ribbon-like tails sprout out from Suicune's back and constantly flow forward. A shiny Suicune is light periwinkle, with a darker periwinkle crest and a cerulean-colored mane.
This Pokémon does not evolve.
In Pokémon FireRed and LeafGreen, Suicune roams around Kanto if the player character's Starter Pokémon was Charmander and they have beaten the Elite Four. In FireRed and LeafGreen, it is very hard to catch because it will flee unless your send out a Pokémon that has the ability Shadow Tag or the move It appears at Level 50.
Suicune appeared alongside Celebi as the title character in the movie Pokémon 4Ever. In the movie, Suicune must purify the lake to restore Celebi and prevent it from dying.
Zoroark: Master of Illusions
Zoroark, with its ability, Illusion, took the form of Suicune (Along with Entei and Raikou) to cause an uproar in Crown City so that Kodai can freely look for the Ripple of Time.
Shiny counterparts of the Legendary Beasts were guardians of Crown City, coming to aid Crown City in times of need. A Shiny Suicune came to Crown City with the other guardians to stop Zoroark (Which they thought was the enemy), but the trio were stopped by wild Pokémon that defended Zoroark, convincing the trio that Zoroark was not evil. The guardians later scared off Kodai after the Ripple of Time was revealed to be an illusion by Zoroark.
Suicune is most likely inspired by Fujin (the Japanese God of the Wind, complimenting Suicune's nickname as the "North Wind") who wore a leopard skin. Because of this, Suicune's appearance is also partially based on that of a leopard. However, it also has some wolf-like traits as well, with a longer muzzle and lither body than its more feline brethren. The "horn" on its head and power to purify water also gives the impression it could have some Kirin influence.
Suicune is the only one of the Legendary Beast trio to be a version mascot.
Ash saw a Suicune at the beginning of his Johto Journey, making this the second time Ash has seen a legendary Johto Pokémon at the beginning of his journey (The first time being Ho-Oh in the first episode).
Suicune is the only non-Ice type to learn Blizzard by leveling up.
Learning Blizzard at level 85, Suicune is the Pokémon that learns Blizzard latest of all those who learn it by leveling up.
Suicune is the only legendary mascot that is not banned from competitive battles.
Suicune is the slowest, the physical weakest, but the most defensive of the legendary beasts.