An Ubers Team
Team At A Glance:






Introduction:
This team is a bulky offense team that centers around setting hazards with Forretress, blowing huge holes in the opposition with Kyurem-W, before cleaning up with the remaining 4 Pokemon: Arceus-Steel, Latias, Kyogre, and Kingdra. At the same time, Arceus-Steel, Latias, Kyogre, and Kingdra all serve to check the opposing team with either bulk or speed. Due to this, the majority of other teams can be beaten with good play; it is rare to find a team that has an overwhelming team advantage.
My experience with this team is why I feel that Kyurem-W is possibly the most devastating Pokemon in Ubers at the moment: Kyurem-W's ability to consistently break through the opposing team's walls is completely key to this team's success.
This team peaked #1 on the PS ladder with a ~90% win ratio (and all of my losses were due to horrible hax), under the alt "snipor", although, admittedly, the ladder isn't that competitive at the moment.

Forretress @ Leftovers
Ability: Sturdy
Nature: Calm
EVs: 252 HP / 176 Def / 80 SpDef
-Stealth Rock
-Spikes
-Volt Switch
-Rapid Spin
Forretress is used on this team because of its ability to spin, set-up hazards, lure in Giratina(-O), and to "beat" Ferrothorn.
By spinning and setting up hazards, it allows Kyurem-W to come in as many times as possible and to punish the opponent for trying to beat Kyurem-W by "smart switching". Kyurem-W also gets a free-switch in from all of the Giratinas that try to spinblock against my Forretress. Forretress also beats Ferrothorn by using it to set-up hazards while simultaneously spinning away the opposing hazards, which is important as Ferrothorn checks basically the rest of my team if played correctly. Finally, this works as a pivot against difficult Pokemon, such as Terrakion, as it can Volt Switch to an appropriate Pokemon.
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Kyogre @ Choice Scarf
Ability: Drizzle
Nature: Timid
EVs: 4 HP / 252 SpAtk / 252 Spe
-Water Spout
-Surf
-Ice Beam
-Thunder
Scarf Kyogre is used on this team because of its ability to set-up rain and check faster threats. It also forms a dual water core with Kingdra, and often provides the power for the core, as it punches holes into the opposition which Kingdra can often clean up.
Kyogre's ability to set-up rain is beneficial in the way that it provides a check for sun teams; lessens both Arceus-Steel's and Forretress' weakness to Fire, which, in the latter's case, allows it to safely set-up against Pokemon like Giratina-O; and activates Kingdra's Swift Swim ability, making it dangerous even in Ubers. It also checks faster threats such as Darkrai and Mewtwo due to its Choice Scarf and its Hydro Pump (which is why Hydro Pump is chosen over Surf).
It punches holes into the opposition's Water resists, most notably Ferrothorn, with its powerful Hydro Pump; if Ferrothorn is weakened to ~30%, Kingdra can then OHKO Ferrothorn with Hydro Pump.
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Kingdra @ Life Orb
Ability: Swift Swim
Nature: Mild
EVs: 4 Atk / 252 SpAtk / 252 Spe
-Waterfall
-Draco Meteor
-Hydro Pump
-Outrage
Kingdra is used on this team because of its ability to check faster threats that Kyogre cannot deal with, while also being able to clean up weakened teams. It forms a dual water core with Kyogre, and often cleans up what Kyogre has started.
Kingdra's Swift Swim ability allows it to revenge some dangerous threats to this team such as Rock Polish Groudon, Latias, and Scarf Palkia. It also checks Kyogre, which allows me to play my Latias more aggressively than I otherwise would be able to. It is also common for me to allow my Kyogre to die to an Outrage, only to have my Kingdra to swiftly revenge. As stated above, it also works with Kyogre to clean up weakened teams.
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Arceus-Steel @ Iron Plate
Ability: Multitype
Nature: Timid
EVs: 252 HP / 4 SpAtk / 252 Spe
-Judgment
-Will-o-Wisp
-Recover
-Calm Mind
Arceus-Steel is used on this team to absorb the numerous Dragon attacks thrown throughout the Uber tier and to check Extremekiller Arceus. It also serves to weaken Ferrothorn and as a win-condition against certain stall teams.
Arceus' typing and bulk allow it to almost completely check Kyurem-W and Kyurem-B, along with other threats such as Latias. It also is my only check to Extremekiller Arceus (although WoW's accuracy is horrible). It lures in Ferrothorn, and can weaken it by burning it, which helps Kyogre and Kingdra, while also making Forretress capable of beating it 1 on 1. Finally, Arceus-Steel can beat some stall teams as a last Pokemon; it is common for me to sacrifice all of my Pokemon to allow Arceus-Steel to sweep the other team.
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Latias @ Soul Dew
Ability: Levitate
Nature: Timid
EVs: 4 HP / 252 SpAtk / 252 Spe
-Dragon Pulse
-Psyshock
-Recover
-Calm Mind
Latias is used primarily as a Kyogre and Groudon check. It also checks most Fighting types It also beats stall teams that have had their steel-type removed.
Latias is the best Kyogre check, with its ability to tank Specs Water Spouts in the rain easily, while also being able to retaliate with a powerful Psyshock. It also works to check Groudon, as it is the only Ground-immune on this team. It can 2HKO even Support Groudon with Dragon Pulse, while Rock Polish Groudon cannot OHKO with Stone Edge. It is also used as a Fighting check, as it can switch in on Arceus-Fighting and Terrakion (assuming they use their Fighting STAB).
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Kyurem-W @ Choice Specs
Ability: Turboblaze
Nature: Modest
EVs: 4 HP / 252 SpAtk / 252 Spe
-Draco Meteor
-Ice Beam
-Focus Blast
-Fusion Flare
Kyurem-W is the epitome of power. It is used to break through the opponent's walls, so as to allow my other Pokemon to sweep. It does amazing things like OHKO Forretress with Specs Draco Meteor. Most of the time, I use Ice Beam unless the opponent has a Heatran, as it 2HKOes pretty much the whole metagame. I switch it into most Groudon, as it can tank an Earthquake pretty easily and retaliate with an Ice Beam, which will 2HKO the whole opposing team the majority of the time. Focus Blast in needed along with Fusion Flare to beat Arceus-Steel in the rain. Interestingly, without SR, this checks Extremekiller pretty well, as it only OHKOes with +2 Extremespeed 30% of the time.
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Threats:
Terrakion and Offensive Groudon are the main threats to this team, seeing as I have no 100% counter to both of them, while they both 2HKO my whole team. Latias is my best bet for both, and I basically need to keep it at 100% to win. Kingdra can also revenge both of them, but it doesn't stop Terrakion before it blows holes in my team, and I have to sacrifice Kyogre against Groudon if I want Kingdra to revenge it.