Suicune is legendary Pokémon of the north wind. Suicune is genderless and water-type.
Suicune eventually teams up with Misty, but after Misty is hurt, Suicune teams up with Crystal.
Suicune is very strong.
Failing to capture Suicune shattered Crystal's confidence and caused her to go back to the basics of capture. Suicune's later acknowledgement of her shows respect and evidence of a moral shift in Crystal.