Last week I decided to venture out of OU and try a new tier. All the Ubers Warstories I've read were basically offense vs offense, with everyone bashing the hell out of each other, and it seemed like fun, so I gave it a try. This is my first Ubers team, and it has had decent success thus far, but I'm hoping it can be better. Without further ado, my team;
Mew @ Lum Berry
Ability: Synchronize
EVs: 252 HP/184 Atk/36 Def/36 SDef
Adamant nature (+Atk, -SAtk)
- Taunt
- Stealth Rock
- Explosion
- U-turn
Straight from the analysis, I chose lead Mew. Mew was my first legendary back in my Red version, so it holds a special place in my heart, so I basically said "screw you, Deoxys" when picking a lead. Every battle so far Mew has managed to get stealth rocks up, and almost every time has also managed to U-Turn away to start me off with some momentum. I'll come back in later to use Mew as either death fodder for a free switch or to explode on something nasty. Either way, Mew gets done what I need, but I have considered putting some EVs into speed to outpace some other leads, but I don't know how many I might need.
Shaymin-s @ Leftovers
Ability: Serene Grace
EVs: 4 HP/252 Spd/252 SAtk
Modest nature (+SAtk, -Atk)
- Seed Flare
- Air Slash
- Leech Seed
- Substitute
Shaymin-s is my answer to most Groudon, especially Rock-Polish versions. It's pretty easy to make Groudon use earthquake, giving Shaymin-s a free switch. I went with the sub-leech version so that it could act as a check to most set-up sweepers, since it can easily outpace so many. Shaymin-s is also pretty much my only way of dealing with Kyogre, although switching it in can be tough.
Giratina-o @ Platinum Orb
Ability: Levitate
EVs: 248 Atk/116 Spd/146 SAtk
Lonely nature (+Atk, -Def)
- Dragon Claw
- Shadow Ball
- Earthquake
- Hidden Power [Fire]
The entry hazards I manage to set up help way too much to let some Foretress spin them away, so I chose Giratina-o to deal with it. The mixed attacker set lets me target the often-forgotten physical defense of so many Ubers, hurting a lot with either Dragon Claw or Earthquake. Shadow Ball is to deal with Lugia and other psychics, and HP fire is practically mandatory on all Giratina-os to deal with Foretress. With Levitate, Giratina-o can switch in to the ever-present Earthquake, which is always a problem on my teams, so the trade-off of EQ immunity seemed worth the lack of recovery.
Rayquaza @ Life Orb
Ability: Air Lock
EVs: 40 Atk/216 Spd/252 SAtk
Hasty nature (+Spd, -Def)
- Draco Meteor
- Fire Blast
- Extremespeed
- Outrage
Mixquaza may have some trouble coming in, but once it does he works wonders. Most Rayquaza are countered by Lugia and Groudon, so this guy works to get rid of them with massive Draco Meteors. Even with just 40 Atk EVs, I can 2HKO Kyogre with Outrage, and Fire Blast is for steel types that love switching in to dragon attacks. Rayquaza's main job is to act as a lure, to allow Dialga an easier time switching in to set up and sweep by eliminating its biggest counters, Lugia and Groudon.
Dialga @ Leftovers
Ability: Pressure
EVs: 252 HP/4 Atk/252 SDef
Careful nature (+SDef, -SAtk)
- Bulk Up
- Rest
- Sleep Talk
- Outrage
Bulk-Up Dialga was the first pokemon I chose for the team. After reading all the analyses (I think that's the plural for "analysis") I realized a lot of pokes in Ubers rely on Special Defense, so I wanted something that would hit hard on the physical side. The rest-talk combo lets me use outrage without locking myself into the move, which is a huge plus. Dialga is my late-game sweeper, although I admittedly haven't had much luck setting up most matches. His resistances and defenses usually let me get him in early to see how my opponent plans to counter him, and then switch out to something else resistant and work on removing that counter until nothing can stand in his way.
Forretress (M) @ Leftovers
Ability: Sturdy
EVs: 252 HP/4 Atk/252 SDef
Careful nature (+SDef, -SAtk)
- Rapid Spin
- Payback
- Toxic Spikes
- Spikes
With my team relying on Rayquaza to remove key pokemon, I can't afford to have SR draining its health every time I switch it in, so I needed Foretress to spin them away. Payback is obvious, to deal with Giratina. With so many resisted dragon attacks to switch into, getting at least one layer of TS or spikes is easy. I try to get Foretress in early for a layer of TS, and its helped tremendously, notably against Wobbuffet and Kyogre, two pokemon who can give any team trouble.
So that's my team. The premise is simple: hit hard with whatever I can, while aiming to allow B.U. Dialga to set up and sweep. It's my first Ubers team, so I expect I'll have to work on it a fair amount before I can call it a good Ubers team, and any help is appreciated.

Mew @ Lum Berry
Ability: Synchronize
EVs: 252 HP/184 Atk/36 Def/36 SDef
Adamant nature (+Atk, -SAtk)
- Taunt
- Stealth Rock
- Explosion
- U-turn
Straight from the analysis, I chose lead Mew. Mew was my first legendary back in my Red version, so it holds a special place in my heart, so I basically said "screw you, Deoxys" when picking a lead. Every battle so far Mew has managed to get stealth rocks up, and almost every time has also managed to U-Turn away to start me off with some momentum. I'll come back in later to use Mew as either death fodder for a free switch or to explode on something nasty. Either way, Mew gets done what I need, but I have considered putting some EVs into speed to outpace some other leads, but I don't know how many I might need.

Shaymin-s @ Leftovers
Ability: Serene Grace
EVs: 4 HP/252 Spd/252 SAtk
Modest nature (+SAtk, -Atk)
- Seed Flare
- Air Slash
- Leech Seed
- Substitute
Shaymin-s is my answer to most Groudon, especially Rock-Polish versions. It's pretty easy to make Groudon use earthquake, giving Shaymin-s a free switch. I went with the sub-leech version so that it could act as a check to most set-up sweepers, since it can easily outpace so many. Shaymin-s is also pretty much my only way of dealing with Kyogre, although switching it in can be tough.

Giratina-o @ Platinum Orb
Ability: Levitate
EVs: 248 Atk/116 Spd/146 SAtk
Lonely nature (+Atk, -Def)
- Dragon Claw
- Shadow Ball
- Earthquake
- Hidden Power [Fire]
The entry hazards I manage to set up help way too much to let some Foretress spin them away, so I chose Giratina-o to deal with it. The mixed attacker set lets me target the often-forgotten physical defense of so many Ubers, hurting a lot with either Dragon Claw or Earthquake. Shadow Ball is to deal with Lugia and other psychics, and HP fire is practically mandatory on all Giratina-os to deal with Foretress. With Levitate, Giratina-o can switch in to the ever-present Earthquake, which is always a problem on my teams, so the trade-off of EQ immunity seemed worth the lack of recovery.

Rayquaza @ Life Orb
Ability: Air Lock
EVs: 40 Atk/216 Spd/252 SAtk
Hasty nature (+Spd, -Def)
- Draco Meteor
- Fire Blast
- Extremespeed
- Outrage
Mixquaza may have some trouble coming in, but once it does he works wonders. Most Rayquaza are countered by Lugia and Groudon, so this guy works to get rid of them with massive Draco Meteors. Even with just 40 Atk EVs, I can 2HKO Kyogre with Outrage, and Fire Blast is for steel types that love switching in to dragon attacks. Rayquaza's main job is to act as a lure, to allow Dialga an easier time switching in to set up and sweep by eliminating its biggest counters, Lugia and Groudon.

Dialga @ Leftovers
Ability: Pressure
EVs: 252 HP/4 Atk/252 SDef
Careful nature (+SDef, -SAtk)
- Bulk Up
- Rest
- Sleep Talk
- Outrage
Bulk-Up Dialga was the first pokemon I chose for the team. After reading all the analyses (I think that's the plural for "analysis") I realized a lot of pokes in Ubers rely on Special Defense, so I wanted something that would hit hard on the physical side. The rest-talk combo lets me use outrage without locking myself into the move, which is a huge plus. Dialga is my late-game sweeper, although I admittedly haven't had much luck setting up most matches. His resistances and defenses usually let me get him in early to see how my opponent plans to counter him, and then switch out to something else resistant and work on removing that counter until nothing can stand in his way.

Forretress (M) @ Leftovers
Ability: Sturdy
EVs: 252 HP/4 Atk/252 SDef
Careful nature (+SDef, -SAtk)
- Rapid Spin
- Payback
- Toxic Spikes
- Spikes
With my team relying on Rayquaza to remove key pokemon, I can't afford to have SR draining its health every time I switch it in, so I needed Foretress to spin them away. Payback is obvious, to deal with Giratina. With so many resisted dragon attacks to switch into, getting at least one layer of TS or spikes is easy. I try to get Foretress in early for a layer of TS, and its helped tremendously, notably against Wobbuffet and Kyogre, two pokemon who can give any team trouble.
So that's my team. The premise is simple: hit hard with whatever I can, while aiming to allow B.U. Dialga to set up and sweep. It's my first Ubers team, so I expect I'll have to work on it a fair amount before I can call it a good Ubers team, and any help is appreciated.