I was actually quite surprised when I saw this wasn't onsite already. It has the power to beat typical checks, and we already have specific analysis spots for Rain Dance/Sunny Day/Trick Room/etc. so I figured why not? Gravity doesn't get enough mention anyways.
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Status:
Rejection: 1/3
Approval: 0/3
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Metagross (Gravity)
http://www.smogon.com/dp/pokemon/metagross
[SET]
name: Gravity
move 1: Gravity
move 2: Earthquake
move 3: Meteor Mash
move 4: Explosion/Stealth Rock/Agility
item: Life Orb/Leftovers
ability: Clear Body
nature: Adamant
evs: 112 HP / 252 Atk / 12 Def / 132 Speed
Why this set deserves to be on-site:
- No gravity sets on-site
- Gravity gives the two attacking moves on the set perfect coverage (save Shedinja) and perfect accuracy.
- Beats all of Metagross's usual counters and checks - Skarmory, Bronzong, Zapdos, and Rotom-A.
- Outclassess Iron Ball Metagross because it can beat multiple checks as opposed to just one, and is guaranteed an item to fit the set.
Additional Comments:
- The last moveslot is dependent on the role you want Metagross to play-it can bluff Agiligross and Gravity on the switch, play a more supporting role with SR, or go BOOM on something preparing a sweep.
- Item choice is dependent on the 4th moveslot-Life Orb is recommended for Explosion sets, Leftovers for Stealth Rock, and either for Agility.
- The given EVs are such that Metagross can outspeed Scarftran after an Agility with an Adamant nature. If not using Agility, an alternate spread of 252 HP / 236 Atk / 12 Def / 8 Spe is recommended.
- Lum Berry is a viable option if you really want to beat the Rotom formes. You can Gravity on the switch, then outspeed and EQ. Stealth Rock is essential for this set, as it turns 2HKOs into OHKOs.
-Bullet Punch can be used if you want 100% insurance against the Rotom formes, but besides that, it's usefulness is limited.
Teammates and Counters:
- This works perfectly with LO gravity Starmie, with it's Hydro Pump/Thunder/Blizzard getting perfect accuracy in Gravity. A Mamoswine also benefits from this because it's dual STAB combo, Ground and Ice now has perfect OU coverage.
- Anything that can set up entry hazards works well with Gravity-Forretress can set up all three, while Tentacruel sets up Toxic Spikes and benefits from gravity with a 100% accurate Hydro Pump.
- Gravity teams attract a lot of incoming Fire and Ground-type attacks, so pokemon that can take these attacks pair nicely with this. It's always nice to see a guaranteed Flash Fire boost on Heatran, and Shaymin can take ground-type attacks and hit back with a 100% accurate Seed Flare, and hit its checks with Earth Power. Heatran`s signature move, Magma Storm, now has 100% accuracy as well.
- Due to Gravity's effect, this Metagross requires different checks for it's different moves. There is no one "hard counter" to this set however. Anything faster that can OHKO counters this set decently. Infernape and Scarftran can counter non-Agility versions, while Celebi and Shaymin can switch in on an EQ and 2HKO with Earth Power. They both need to be wary of Explosion, however.
_________________________________________________
Status:
Rejection: 1/3
Approval: 0/3
_________________________________________________
Metagross (Gravity)

http://www.smogon.com/dp/pokemon/metagross
[SET]
name: Gravity
move 1: Gravity
move 2: Earthquake
move 3: Meteor Mash
move 4: Explosion/Stealth Rock/Agility
item: Life Orb/Leftovers
ability: Clear Body
nature: Adamant
evs: 112 HP / 252 Atk / 12 Def / 132 Speed
Why this set deserves to be on-site:
- No gravity sets on-site
- Gravity gives the two attacking moves on the set perfect coverage (save Shedinja) and perfect accuracy.
- Beats all of Metagross's usual counters and checks - Skarmory, Bronzong, Zapdos, and Rotom-A.
- Outclassess Iron Ball Metagross because it can beat multiple checks as opposed to just one, and is guaranteed an item to fit the set.
Additional Comments:
- The last moveslot is dependent on the role you want Metagross to play-it can bluff Agiligross and Gravity on the switch, play a more supporting role with SR, or go BOOM on something preparing a sweep.
- Item choice is dependent on the 4th moveslot-Life Orb is recommended for Explosion sets, Leftovers for Stealth Rock, and either for Agility.
- The given EVs are such that Metagross can outspeed Scarftran after an Agility with an Adamant nature. If not using Agility, an alternate spread of 252 HP / 236 Atk / 12 Def / 8 Spe is recommended.
- Lum Berry is a viable option if you really want to beat the Rotom formes. You can Gravity on the switch, then outspeed and EQ. Stealth Rock is essential for this set, as it turns 2HKOs into OHKOs.
-Bullet Punch can be used if you want 100% insurance against the Rotom formes, but besides that, it's usefulness is limited.
Teammates and Counters:
- This works perfectly with LO gravity Starmie, with it's Hydro Pump/Thunder/Blizzard getting perfect accuracy in Gravity. A Mamoswine also benefits from this because it's dual STAB combo, Ground and Ice now has perfect OU coverage.
- Anything that can set up entry hazards works well with Gravity-Forretress can set up all three, while Tentacruel sets up Toxic Spikes and benefits from gravity with a 100% accurate Hydro Pump.
- Gravity teams attract a lot of incoming Fire and Ground-type attacks, so pokemon that can take these attacks pair nicely with this. It's always nice to see a guaranteed Flash Fire boost on Heatran, and Shaymin can take ground-type attacks and hit back with a 100% accurate Seed Flare, and hit its checks with Earth Power. Heatran`s signature move, Magma Storm, now has 100% accuracy as well.
- Due to Gravity's effect, this Metagross requires different checks for it's different moves. There is no one "hard counter" to this set however. Anything faster that can OHKO counters this set decently. Infernape and Scarftran can counter non-Agility versions, while Celebi and Shaymin can switch in on an EQ and 2HKO with Earth Power. They both need to be wary of Explosion, however.