Hey all, I've been playing around with this for a few matches and it's pretty usable. Not sure if it warrants its own set or just an OC mention, but it's certainly not crappy, IMO.
http://www.smogon.com/dp/pokemon/suicune
[SET]
name: Choice Specs
move 1: Hydro Pump
move 2: Surf
move 3: Ice Beam
move 4: Hidden Power Electric
item: Choice Specs
nature: Modest / Timid
evs: 4 HP / 252 SpA / 252 Spe
ivs: 23 Atk / 30 SpA
Why this set deserves to be on-site:
- Surprisingly powerful and has excellent bulk to switch in multiple times to dish out the pain. Is a powerful tank, and its bulk is what sets it apart from other Water-typed Specs users (Kingdra, Starmie, etc)
- So far is rather unexpected, but even when the surprise wears off, it can still do its thing without much disruption
- Excellent check to many Pokemon in OU, be it Dragonite, Gyarados, Tyranitar, Heatran, etc
- Can lure in checks expecting CM like Zapdos, Jolteon, Rotom-A, Shaymin and Celebi and do a lot of damage to them
Damage calculations (Assuming Modest):
Hydro Pump vs 240 HP / 52 SpD Swampert: 64.34% - 75.81%
Hydro Pump vs 248 HP / 0 SpD Zapdos: 71.28% - 84.07%
Hydro Pump vs 4 HP / 0 SpD Tyranitar (In Sandstorm): 98.25% - 100%
Hydro Pump vs 0 HP / 0 SpD Gyarados: 37.76% - 44.41%
Hydro Pump vs 12 HP / 0 SpD Empoleon: 39.42% - 46.79%
Hydro Pump vs 0 HP / 0 SpD Jolteon: 96.68% - 100%
Hydro Pump vs 252 HP / 0 SpD Rotom-A: 77.96% - 91.78%
Hydro Pump vs 12 HP / 0 SpD Breloom: 71.59% - 84.09%
Ice Beam vs 4 HP / 0 SpD Shaymin: 77.19% - 91.23%
Ice Beam vs 252 HP / 0 SpD Celebi: 65.35% - 77.23%
Hidden Power Electric vs 188 HP / 0 SpD Vaporeon: 45.54% - 54.02%
Additional Comments:
- Bulkier spread of 244 HP / 252 SpA / 12 Spe is fine too if you don't mind Suicune getting outsped by faster Breloom and stuff like that. 12 Spe allowing Suicune to outspeed minimum speed Rotom-A.
- Shadow Ball and Extrasensory are alternate coverage moves, but they don't give you anything special in terms of coverage
- IVs are for legality issues
Teammates and Counters:
- Pokemon to take Electric and Grass moves are nice. A Celebi or Shaymin or your own does well. Roserade can also switch into Specially based Electric and Grass moves and set up Toxic Spikes or Spikes. Specially Defensive Heatran can take pretty much every Grass move and loads of Electric attacks too.
- Something to get rid of Blissey is nice
- Counters: Blissey, Vaporeon (Can Protect Turn 1 after eating HP Electric and stall out Suicune), Lanturn, Ludicolo, Shedinja wall Suicune. If the regular CM Suicune checks can switch in safely (Celebi, Shaymin, Zapdos, Jolteon, Rotom-A), they can destroy Suicune pretty badly

http://www.smogon.com/dp/pokemon/suicune
[SET]
name: Choice Specs
move 1: Hydro Pump
move 2: Surf
move 3: Ice Beam
move 4: Hidden Power Electric
item: Choice Specs
nature: Modest / Timid
evs: 4 HP / 252 SpA / 252 Spe
ivs: 23 Atk / 30 SpA
Why this set deserves to be on-site:
- Surprisingly powerful and has excellent bulk to switch in multiple times to dish out the pain. Is a powerful tank, and its bulk is what sets it apart from other Water-typed Specs users (Kingdra, Starmie, etc)
- So far is rather unexpected, but even when the surprise wears off, it can still do its thing without much disruption
- Excellent check to many Pokemon in OU, be it Dragonite, Gyarados, Tyranitar, Heatran, etc
- Can lure in checks expecting CM like Zapdos, Jolteon, Rotom-A, Shaymin and Celebi and do a lot of damage to them
Damage calculations (Assuming Modest):
Hydro Pump vs 240 HP / 52 SpD Swampert: 64.34% - 75.81%
Hydro Pump vs 248 HP / 0 SpD Zapdos: 71.28% - 84.07%
Hydro Pump vs 4 HP / 0 SpD Tyranitar (In Sandstorm): 98.25% - 100%
Hydro Pump vs 0 HP / 0 SpD Gyarados: 37.76% - 44.41%
Hydro Pump vs 12 HP / 0 SpD Empoleon: 39.42% - 46.79%
Hydro Pump vs 0 HP / 0 SpD Jolteon: 96.68% - 100%
Hydro Pump vs 252 HP / 0 SpD Rotom-A: 77.96% - 91.78%
Hydro Pump vs 12 HP / 0 SpD Breloom: 71.59% - 84.09%
Ice Beam vs 4 HP / 0 SpD Shaymin: 77.19% - 91.23%
Ice Beam vs 252 HP / 0 SpD Celebi: 65.35% - 77.23%
Hidden Power Electric vs 188 HP / 0 SpD Vaporeon: 45.54% - 54.02%
Additional Comments:
- Bulkier spread of 244 HP / 252 SpA / 12 Spe is fine too if you don't mind Suicune getting outsped by faster Breloom and stuff like that. 12 Spe allowing Suicune to outspeed minimum speed Rotom-A.
- Shadow Ball and Extrasensory are alternate coverage moves, but they don't give you anything special in terms of coverage
- IVs are for legality issues
Teammates and Counters:
- Pokemon to take Electric and Grass moves are nice. A Celebi or Shaymin or your own does well. Roserade can also switch into Specially based Electric and Grass moves and set up Toxic Spikes or Spikes. Specially Defensive Heatran can take pretty much every Grass move and loads of Electric attacks too.
- Something to get rid of Blissey is nice
- Counters: Blissey, Vaporeon (Can Protect Turn 1 after eating HP Electric and stall out Suicune), Lanturn, Ludicolo, Shedinja wall Suicune. If the regular CM Suicune checks can switch in safely (Celebi, Shaymin, Zapdos, Jolteon, Rotom-A), they can destroy Suicune pretty badly