I think Dr.Traveler really hit the nail on the head here.
This discussion needs to stop. Garchomp stays in OU. If you hate fighting it, play BL/UU.
Using garchomp with SS support is for noobs.
Once again you have put us all to shame with your amazing insight. I will be posting shortly on why Garchomp should be allowed in OU.
edit:
Much like many Pokemon players I came off RSE craze in which Tyranitar destroyed teams. During his peak of the 3rd generation people were bragging about how impossible it is to counter him 100% and suggested he be moved to Uber. This was again brought up when we all found out Tyranitar would receive the 1.5X boost from Sand Stream as well as many new benefits. This argument died down and eventually Tyranitar was dealt with accordingly.
I bring this up for contrast and comparison. Now onto a more tactful strategy.
I had long been absent from Pokemon due to my lack of a Nintendo DS. Upon my return to competitive battling, IIRC, while Garchomp was labeled mediocre much like his cousin, Flygon. This was of course after the release of Diamond and Pearl. Shortly after he was deemed an immediate threat thanks to the realization of (Swords Dance + Base 130 Atk + Base 102 Speed + STAB'ed Earthquake = Danger).
Surely Garchomp is a monster boasting a Base Stat Total of 600 with only two weaknesses; a 2x weakness to Dragon, and a 4x weakness to Ice. Lets break this down some.
Pokemon who carry a Dragon attack as a standard move are:
-Sceptile
-Heatran
-Charizard*
-Arcanine*
-Kingdra
-Salamence
-Dragonite
-Flygon*
Sceptile- The speedy Grass Pokemon boasts a Base 105 Special Attack and Base 120 Speed. He out speeds all forms of Garchomp except the Choice Scarf'ed version. Sometimes he carries Hidden Power Ice and let me tell you Garchomp won't be taking those attacks too well.
Heatran- Although at a disadvantage because of his Speed Heatran can afford to switch in on a Choice User being that he is the only Pokemon in the game that resists Dragon + Fire. Choice Specs Heatran OHKOs Garchomp with Dragon Pulse. To compensate for his speed Heatran throws on a Choice Scarf and alternatively uses Hidden Power Ice to destroy the Land Shark.
Charizard*- A very risky switch because of Stealth Rock, and a potential Stone Edge from Garchomp. Not only that but Charizard is also at a disadvantage speed-wise. He isn't even worth considering as a Garchomp revenge killer.
Arcanine*- Unlike Charizard who is immune to one of Garchomps attack, Arcanine will be devastated by Earthquake. Slower than Charizard and equally as fragile he shouldn't be considered.
Kingdra- Kingdra has a couple ways of damaging Garchomp. It can go with a Sniper Ice Beam or STAB'ed Draco Meteor as Kingdra will survive a couple of the attacks Garchomp can throw at it. Alternatively Kingdra can go the other route with Swift Swim and out speed Choice Scarf Garchomp and OHKO with one of three attacks.
Salamence- Boasting a Base 135 Attack, STAB'ed Dragon attacks in the form of Draco Meteor and Dragon Claw, as well as Intimidate and Dragon Dance with an immunity to Earthquake can be trouble for Garchomp users. To consider the removal of Garchomp without giving any consideration to Salamence is absurd.
Dragonite- The famous Dragon Dance + Outrage combo spells trouble for Garchomp. Because of Dragonite's Speed, Dragonite will solely rely on Dragon Dance to compete with Garchomp. Unlike his other Dragon brethren Dragonite gets the option of Focus Punch something they all wish they had.
Flygon- The previous Garchomp if you may. Only capable of dealing damage via Choice Scarf and Draco Meteor unless the opposing Garchomp is of a neutral Speed nature.
*6/8 Pokemon who carry a Dragon type move by default can deal with Garchomp effectively.
Unfortunately I will not break down the Ice attacks as it is rather pointless to show how devastating it is to shoot Garchomp down with Ice attacks.
On to Garchomp's sets.
Lets look at Choice Bander Garchomp the least popular form.
He runs Dragon Claw, Earthquake, Stone Edge and Fire Fang. He is walled by Skarmory, Swampert, and Hippowdon. To bypass Skarmory who can only hope to Whirlwind him away he can use Fire Blast over Fire Fang which then renders him useless against Bronzong who resists all of his attacks except for Fire Blast. Crunch is an option to hit Psychics like Slowbro and Cresselia for Super Effective damage. Unfortunately for Garchomp Slowbro can recover the damage, and Cresselia can just snooze on him. Swampert takes all of his hits pretty well and retaliates with Avalanche and Ice Beam. Hippowdon just recovers whatever he throws at him and hits him with Ice Fang. There goes the fearsome Choice Bander.
Choice Scarf Garchomp is almost the exact same thing but with a super dosage of speed. Unfortunately for Choice Scarf Garchomp, Pokemon like Donphan and Mamoswine carry Ice Shard, the later severely crippling it, he looses ferocity. Taking into account how common ScarfGar has become also means problem for the Land Shark as he tends to carry Hidden Power Ice every so often.
The Swords Dancer is a fearsome Pokemon but without Sand Stream support he runs into many of the same problems as the other versions. In case you don't remember here are Pokemon that give him problems whether he is locked into a move (CS/CB/Outrage), caught on the switch (Gengar, Cresselia, Skarmory, and Bronzong), or whether they just bypass him (Weavile/Mamoswine/Donphan):
-Weavile
-Mamoswine
-Donphan
-Swampert
-Suicune
-Starmie
-Hippowdon
-Cresselia
-Skarmory
-Bronzong
-Gengar
-SpecsLucario
Out of those Pokemon Jolly Swords Dancing Garchomp can not outspeed Weavile, Starmie, and Gengar. Unfortunately for him, without the aid of a Yache Berry all 3 beat him to the punch and OHKO him. The power behind this though makes switch ins a risky switch.
Pokemon who can effectively switch into a Swords Dancer:
-Hippowdon
-Cresselia
-Skarmory
-Bronzong
-Swampert
Given Garchomp has not already attacked, these Pokemon come in easily.
Hippowdon takes neutral damage, Slack Offs, and Ice Fangs/Roars.
Cresselia is always trouble for Garchomp.
Skarmory resists Dragon, is immune to Ground attacks, and takes Fire Fang rather well.
Bronzong isn't fond of Fire Fang but Explodes in his face.
Blah this argument will be partial. My English isn't as good as other members and I feel like any more of an effort on my part will go to waste as I am sure everything has been said. 33 pages >.>