This moveset has probably been suggested before in the past, but I have tested this set quite thoroughly on the OU ladder over the last few days, and it works rather well. So, without further ado, Anti-Lead Abomasnow.
http://www.smogon.com/dp/pokemon/abomasnow
name: Anti-Lead
Move 1: Ice Shard
Move 2: Blizzard
Move 3: Earthquake / Magic Coat
Move 4: Grass Knot / Magic Coat
Item: Focus Sash
Nature: Mild / Rash
EVs: 252 Atk, 252 SpA, 4 Spe
The Attack and Special Attack EVs are chosen to maximise damage output. Grass Knot is used to OHKO lead Swampert and to severely dent Tyranitar switch-ins, while Earthquake allows Abomasnow to 1HKO or 2HKO all Heatran switch-ins (OHKOing Choice variants 100% of the time, and 2HKOing even the most bulky variants). Earthquake will also deal decent damage to most Tyranitar variants, however Grass Knot is more powerful against anything but the most specially bulky variants. Magic Coat is listed as an option because it helps to deal with status leads, such as Roserade and Smeargle.
Some of the leads that this Abomasnow can beat outright are listed here:
- 4HP/minDef/minSpD Azelf: Blizzard + Ice Shard KOs 100% of the time, without even having to factor in the Hail damage.
- min/min/min Dragonite: Ice Shard nets a clean OHKO, and Abomasnow should even be able to keep it's Focus Sash intact against the standard 4 Speed + Quiet natured lead.
- Aerodactyl: Ice Shard will 2HKO 100% of the time factoring in one round of Hail damage. Ice Shard is used instead of Blizzard to avoid flinching by the likes of Rock Slide or Fire Fang.
- Swampert: Grass Knot will OHKO 100% of the time; however, if you are not running Grass Knot, Blizzard will more often than not only get a 3HKO.
- Roserade: Magic Coat can reflect the inevitable Sleep Powder right back, which will cause most to switch out. However, the Hail will break its Sash, leaving it vulnerable when it next switches in.
- Smeargle: As above, but Smeargle does not have Natural Cure, making Magic Coat an amazing counter to it.
- Hippowdon: Hippowdon is slower than Abomasnow, so the Sandstorm will prevail over Hail; however, Grass Knot will OHKO any Hippowdon that does not significantly invest in Special Defense and HP.
- Tyranitar: Lead Tyranitar outspeeds Abomasnow, meaning that Hail will prevail over Sandstorm. Grass Knot will OHKO low-bulk variants around 90% of the time, and even bulky variants with significant HP investment (such as Choice Band) are KO'd 100% of the time by Grass Knot + Ice Shard.
Also, Choice Scarf + Trick leads are often beaten by Abomasnow, as if they decide to use Trick, the Focus Sash they receive from you will be rendered useless by the Hail, and Abomasnow can 2HKO most (such as Jirachi with Earthquake, Uxie with Blizzard, etc.)
Common leads that Abomasnow should watch out for include Metagross, Jirachi, Infernape and Machamp. Metagross outspeeds Abomasnow, and can easily 2HKO through the Sash with Bullet Punch. Abomasnow's Earthquake in return does less than 50% damage to the standard bulky lead Metagross. A Levitate Bronzong is a great switch-in to lead Metagross, as it resists Meteor Mash, Bullet Punch and Explosion, and is immune to Earthquake. Bronzong can then set up on Metagross with support moves such as Reflect, Light Screen and Stealth Rock.
Lead Choice Scarf Jirachi can easily 2HKO Abomasnow with Iron Head through the Focus Sash, with a 60% chance that Abomasnow will not even get to retaliate. As with Metagross, Bronzong can switch into Jirachis attacks easily and set up, although it should watch out for Trick.
Infernape leads lacking a priority move are defeated 100% of the time by Earthquake + Ice Shard, factoring in the Hail damage after the first turn; however, lead Infernapes often carry Fake Out or Vacuum Wave, both of which cause Abomasnow to be defeated.
The standard Machamp lead can easily 2HKO with Bullet Punch, however it often uses DynamicPunch first, which means the confusion status can be reflected back at Machamp. If Machamp hurts itself in confusion, Blizzard + 2 rounds of Hail damage + self-damage will KO 100% of the time.
Edited following comments and further investigation 15/8/2010
http://www.smogon.com/dp/pokemon/abomasnow
name: Anti-Lead
Move 1: Ice Shard
Move 2: Blizzard
Move 3: Earthquake / Magic Coat
Move 4: Grass Knot / Magic Coat
Item: Focus Sash
Nature: Mild / Rash
EVs: 252 Atk, 252 SpA, 4 Spe
The Attack and Special Attack EVs are chosen to maximise damage output. Grass Knot is used to OHKO lead Swampert and to severely dent Tyranitar switch-ins, while Earthquake allows Abomasnow to 1HKO or 2HKO all Heatran switch-ins (OHKOing Choice variants 100% of the time, and 2HKOing even the most bulky variants). Earthquake will also deal decent damage to most Tyranitar variants, however Grass Knot is more powerful against anything but the most specially bulky variants. Magic Coat is listed as an option because it helps to deal with status leads, such as Roserade and Smeargle.
Some of the leads that this Abomasnow can beat outright are listed here:
- 4HP/minDef/minSpD Azelf: Blizzard + Ice Shard KOs 100% of the time, without even having to factor in the Hail damage.
- min/min/min Dragonite: Ice Shard nets a clean OHKO, and Abomasnow should even be able to keep it's Focus Sash intact against the standard 4 Speed + Quiet natured lead.
- Aerodactyl: Ice Shard will 2HKO 100% of the time factoring in one round of Hail damage. Ice Shard is used instead of Blizzard to avoid flinching by the likes of Rock Slide or Fire Fang.
- Swampert: Grass Knot will OHKO 100% of the time; however, if you are not running Grass Knot, Blizzard will more often than not only get a 3HKO.
- Roserade: Magic Coat can reflect the inevitable Sleep Powder right back, which will cause most to switch out. However, the Hail will break its Sash, leaving it vulnerable when it next switches in.
- Smeargle: As above, but Smeargle does not have Natural Cure, making Magic Coat an amazing counter to it.
- Hippowdon: Hippowdon is slower than Abomasnow, so the Sandstorm will prevail over Hail; however, Grass Knot will OHKO any Hippowdon that does not significantly invest in Special Defense and HP.
- Tyranitar: Lead Tyranitar outspeeds Abomasnow, meaning that Hail will prevail over Sandstorm. Grass Knot will OHKO low-bulk variants around 90% of the time, and even bulky variants with significant HP investment (such as Choice Band) are KO'd 100% of the time by Grass Knot + Ice Shard.
Also, Choice Scarf + Trick leads are often beaten by Abomasnow, as if they decide to use Trick, the Focus Sash they receive from you will be rendered useless by the Hail, and Abomasnow can 2HKO most (such as Jirachi with Earthquake, Uxie with Blizzard, etc.)
Common leads that Abomasnow should watch out for include Metagross, Jirachi, Infernape and Machamp. Metagross outspeeds Abomasnow, and can easily 2HKO through the Sash with Bullet Punch. Abomasnow's Earthquake in return does less than 50% damage to the standard bulky lead Metagross. A Levitate Bronzong is a great switch-in to lead Metagross, as it resists Meteor Mash, Bullet Punch and Explosion, and is immune to Earthquake. Bronzong can then set up on Metagross with support moves such as Reflect, Light Screen and Stealth Rock.
Lead Choice Scarf Jirachi can easily 2HKO Abomasnow with Iron Head through the Focus Sash, with a 60% chance that Abomasnow will not even get to retaliate. As with Metagross, Bronzong can switch into Jirachis attacks easily and set up, although it should watch out for Trick.
Infernape leads lacking a priority move are defeated 100% of the time by Earthquake + Ice Shard, factoring in the Hail damage after the first turn; however, lead Infernapes often carry Fake Out or Vacuum Wave, both of which cause Abomasnow to be defeated.
The standard Machamp lead can easily 2HKO with Bullet Punch, however it often uses DynamicPunch first, which means the confusion status can be reflected back at Machamp. If Machamp hurts itself in confusion, Blizzard + 2 rounds of Hail damage + self-damage will KO 100% of the time.
Edited following comments and further investigation 15/8/2010