Ah, the famous CroCune. I think I explained it at the Suicune moveset question, but I shall repost it here.
The following was copypasta'd from the Suicune moveset question.
The all famous CroCune! Given this name because it was used by the battler Cromat in Gen III.
Suicune @ Leftovers
EVs: 252 HP / 212 Def / 8 Spd / 36 SAtk
Bold Nature (+Def, -Atk)
Surf / Scald
One of my favorite sets :D
TL;DR: This Suicune set was used by the battler Cromat in Gen III, thus naming it CroCune. It is basically a RestTalk set.