This set I've seen in a couple of RMT's, usually with a more offensive EV spread, but as far as I know no one's done a write up for it.
http://www.smogon.com/dp/pokemon/suicune
Note: Has trouble getting past bulky water/grass combinations since it can't hit both SE; Toxic Spikes are helpful but pretty sure AC is the most this should get now.
ChestoRest
Move 1: Calm Mind
Move 2: Rest
Move 3: Surf
Move 4: Ice Beam / Hidden Power (Electric)
Item: Chesto Berry
Nature: Timid
Ability: Pressure
EV's: 252 HP / 32 SpAtk / 224 Spe
Why?
-Allows Suicune to stat up and recover HP and status while maintaining two offensive options.
-Suicune's great bulk makes it almost impossible to kill after it has reached a certain number of Calm Mind boosts. The Chesto Rest strategy aims Suicune to compile a number of boosts to the point that the opponent will struggle to directly damage it, while also eliminating status effects. For example, Scarf Rotom-A's Thunderbolt can only manage 46.5% max after a CM boost. This allows Suicune to set up against almost all non-Choice Specs special attackers in the metagame, especially with the prevalence of Heatran providing numerous opportunities to switch in.
Set Comments, EV's etc
-EV's and Timid nature allow you to outrun max speed Gyarados and everything below that. HP maxed for the most efficient buffering of its defenses and then the remainder in SpAtk.
-Surf, Rest and Calm Mind are self explanatory. Ice Beam is listed as the primary option over HP Electric because as a sweeper, it gives somewhat better coverage and has higher base power. HP Electric is really only necessary for Gyarados and other bulky waters.
-Lum Berry could be considered over Chesto Berry, the main argument being that you wouldn't have to Rest to heal status, and status, especially paralysis, can sometimes prevent you from Resting. However, it makes the Rest less reliable and is generally the inferior option.
Additional Comments
-Keeping Toxic Spikes off your side of the field is extremely helpful, though not as important as for most Suicune sets due to Rest. All hazards will have a significant impact on Suicune's ability to set up so Rapid Spin support can be helpful (Forretress in particular lures Heatran which you can set up against).
-Whichever move is used in the 4th slot Suicune is going to be walled by either Waters or Grass types. Many of these it can overcome, such as Starmie and defensive Celebi whose super effective attacks do insignificant damage after 1 or 2 boosts. However, Toxic Spikes support of your own can be useful since it cripples most of these pokemon and allows Suicune to stall them out.
-An offensive EV spread, with 32 HP / 252 SpA / 224 Spe, can also be used, although this Suicune typically gets more advantage from the extra set up opportunities the bulky EV's afford it.
Team Mates and Counters
-As mentioned, Suicune is countered mostly by Grass and Water types, but bulky phazers such as Zapdos can also force it out of play.
-Trick users are especially annoying for Suicune, the most common being Scarf Rotom-A, so Choiced Tyranitar and Scizor make worthwhile partners. CB Scizor in particular can lure in Heatran and Gyarados for Suicune to boost against.
-Forretress and Roserade work extremely well with Suicune, laying Toxic Spikes for it, absorbing or Spinning Toxic Spikes, and luring Fire types.
http://www.smogon.com/dp/pokemon/suicune
Note: Has trouble getting past bulky water/grass combinations since it can't hit both SE; Toxic Spikes are helpful but pretty sure AC is the most this should get now.
ChestoRest
Move 1: Calm Mind
Move 2: Rest
Move 3: Surf
Move 4: Ice Beam / Hidden Power (Electric)
Item: Chesto Berry
Nature: Timid
Ability: Pressure
EV's: 252 HP / 32 SpAtk / 224 Spe
Why?
-Allows Suicune to stat up and recover HP and status while maintaining two offensive options.
-Suicune's great bulk makes it almost impossible to kill after it has reached a certain number of Calm Mind boosts. The Chesto Rest strategy aims Suicune to compile a number of boosts to the point that the opponent will struggle to directly damage it, while also eliminating status effects. For example, Scarf Rotom-A's Thunderbolt can only manage 46.5% max after a CM boost. This allows Suicune to set up against almost all non-Choice Specs special attackers in the metagame, especially with the prevalence of Heatran providing numerous opportunities to switch in.
Set Comments, EV's etc
-EV's and Timid nature allow you to outrun max speed Gyarados and everything below that. HP maxed for the most efficient buffering of its defenses and then the remainder in SpAtk.
-Surf, Rest and Calm Mind are self explanatory. Ice Beam is listed as the primary option over HP Electric because as a sweeper, it gives somewhat better coverage and has higher base power. HP Electric is really only necessary for Gyarados and other bulky waters.
-Lum Berry could be considered over Chesto Berry, the main argument being that you wouldn't have to Rest to heal status, and status, especially paralysis, can sometimes prevent you from Resting. However, it makes the Rest less reliable and is generally the inferior option.
Additional Comments
-Keeping Toxic Spikes off your side of the field is extremely helpful, though not as important as for most Suicune sets due to Rest. All hazards will have a significant impact on Suicune's ability to set up so Rapid Spin support can be helpful (Forretress in particular lures Heatran which you can set up against).
-Whichever move is used in the 4th slot Suicune is going to be walled by either Waters or Grass types. Many of these it can overcome, such as Starmie and defensive Celebi whose super effective attacks do insignificant damage after 1 or 2 boosts. However, Toxic Spikes support of your own can be useful since it cripples most of these pokemon and allows Suicune to stall them out.
-An offensive EV spread, with 32 HP / 252 SpA / 224 Spe, can also be used, although this Suicune typically gets more advantage from the extra set up opportunities the bulky EV's afford it.
Team Mates and Counters
-As mentioned, Suicune is countered mostly by Grass and Water types, but bulky phazers such as Zapdos can also force it out of play.
-Trick users are especially annoying for Suicune, the most common being Scarf Rotom-A, so Choiced Tyranitar and Scizor make worthwhile partners. CB Scizor in particular can lure in Heatran and Gyarados for Suicune to boost against.
-Forretress and Roserade work extremely well with Suicune, laying Toxic Spikes for it, absorbing or Spinning Toxic Spikes, and luring Fire types.

















