I've used this set hugely this week, it's had fantastic results. Before you say "gimmick" or whatever, I've shown this to other people and they too have had excellent results, such as Mind and Ace Matador (and to a lesser extent, Havak).
http://www.smogon.com/dp/pokemon/ludicolo/
[SET]
name: Uber Support
move 1: Leech Seed
move 2: Protect
move 3: Grass Knot
move 4: Ice Beam / Toxic
item: Leftovers
nature: Calm
ability: Rain Dish
evs: 252 HP / 40 Def / 216 SpD
[SET COMMENTS]
<p>Ludicolo may seem like a mediocre Pokémon for use in Ubers at first glance, but surprisingly it has its own niche in the metagame, courtesy of Leech Seed, Protect, and Rain Dish.</p>
<p>Due to the Uber metagame generally being specially based, Ludicolo can come in on many Pokémon with its very acceptable Special Defense stat. Ludicolo will take a maximum of 38% damage from a Choice Scarf Kyogre's Thunder, which is quickly made less worrying by the accumulation of Rain Dish and Leftovers, together granting Ludicolo 12.5% health back per turn in the rain. Ludicolo can then Leech Seed for at least another 11% health return, meaning Ludicolo can outstall Kyogre with Protect.</p>
<p>Leech Seed is made all the more useful in Ubers due to many Pokémon in the tier having gargantuan HP, meaning Ludicolo will often find itself healing 25% of its health per turn with Protect. Protect also helps against Choice users, allowing Ludicolo to scout the incoming attack.</p>
<p>Grass Knot will 2HKO Groudon and offensive Kyogre, while also being a very reliable attack versus Palkia, Darkrai, and Mewtwo. Ice Beam hits Rayquaza who may feel like Dragon Dancing or using Swords Dance expecting a switch, and will be promptly OHKOed after Stealth Rock damage, provided it doesn't invest heavily in HP. Ice Beam also helps against Garchomp, and to an extent, Dialga.</p>
<p>However, Toxic is a secondary option for the fourth slot. This often allows Ludicolo to specifically beat Lugia, provided it does not carry Toxic itself. However, this means that many Uber Pokémon will cause more immediate problems for the set, such as Giratina, or Latias carrying Refresh or Safeguard. Dialga will have a much easier time as it is not affected by Toxic, and Grass Knot will not do huge amounts of damage. Finally, it becomes much easier for Rayquaza and Garchomp to wreak havoc for a few turns before Toxic damage would finish them off.</p>
<p>Maximum HP provides overall defensive ability, while 216 Special Defense EVs provide a bonus point. The rest of the EVs go into Defense, allowing Ludicolo to take hits like Darkrai's non-boosted Focus Punch much easier.</p>
http://www.smogon.com/dp/pokemon/ludicolo/
[SET]
name: Uber Support
move 1: Leech Seed
move 2: Protect
move 3: Grass Knot
move 4: Ice Beam / Toxic
item: Leftovers
nature: Calm
ability: Rain Dish
evs: 252 HP / 40 Def / 216 SpD
[SET COMMENTS]
<p>Ludicolo may seem like a mediocre Pokémon for use in Ubers at first glance, but surprisingly it has its own niche in the metagame, courtesy of Leech Seed, Protect, and Rain Dish.</p>
<p>Due to the Uber metagame generally being specially based, Ludicolo can come in on many Pokémon with its very acceptable Special Defense stat. Ludicolo will take a maximum of 38% damage from a Choice Scarf Kyogre's Thunder, which is quickly made less worrying by the accumulation of Rain Dish and Leftovers, together granting Ludicolo 12.5% health back per turn in the rain. Ludicolo can then Leech Seed for at least another 11% health return, meaning Ludicolo can outstall Kyogre with Protect.</p>
<p>Leech Seed is made all the more useful in Ubers due to many Pokémon in the tier having gargantuan HP, meaning Ludicolo will often find itself healing 25% of its health per turn with Protect. Protect also helps against Choice users, allowing Ludicolo to scout the incoming attack.</p>
<p>Grass Knot will 2HKO Groudon and offensive Kyogre, while also being a very reliable attack versus Palkia, Darkrai, and Mewtwo. Ice Beam hits Rayquaza who may feel like Dragon Dancing or using Swords Dance expecting a switch, and will be promptly OHKOed after Stealth Rock damage, provided it doesn't invest heavily in HP. Ice Beam also helps against Garchomp, and to an extent, Dialga.</p>
<p>However, Toxic is a secondary option for the fourth slot. This often allows Ludicolo to specifically beat Lugia, provided it does not carry Toxic itself. However, this means that many Uber Pokémon will cause more immediate problems for the set, such as Giratina, or Latias carrying Refresh or Safeguard. Dialga will have a much easier time as it is not affected by Toxic, and Grass Knot will not do huge amounts of damage. Finally, it becomes much easier for Rayquaza and Garchomp to wreak havoc for a few turns before Toxic damage would finish them off.</p>
<p>Maximum HP provides overall defensive ability, while 216 Special Defense EVs provide a bonus point. The rest of the EVs go into Defense, allowing Ludicolo to take hits like Darkrai's non-boosted Focus Punch much easier.</p>