Suicune returns for another generation to bash its opponents to oblivion. It, along with the rest of its trio, are stuck in Generation 5 UU, a big step down for Suicune. However, there are plenty of threats for it to check in UU, namely Victini, as it can come in on any attack not named Fusion Bolt and OHKO or do massive damage with Surf. However, it has to watch out for Pokemon who get STAB on super-effective attacks, namely Zapdos, Celebi, and Shaymin.
The main set should probably look something like this:
name: Offensive Calm Mind
move 1: Calm Mind
move 2: Surf / Hydro Pump
move 3: Ice Beam
move 4: Hidden Power Electric / Hidden Power Fire
item: Leftovers / Life Orb
nature: Timid
evs: 252 SpA / 4 SpD / 252 Spe
Almost a direct C/P from the analysis. However, HP Fire seems to be massively more useful for taking care of threats that are weak to it, namely Kyurem, Heracross, Bisharp, and Celebi among others.
name: CroCune
move 1: Scald / Surf
move 2: Calm Mind
move 3: Rest
move 4: Sleep Talk
item: Leftovers
nature: Bold
evs: 252 HP / 252 Def / 4 SpD
Discuss.