You guys are OVERVIEWING Garchomp. Seriously, so if someone sends out a Garchomp, you'd go like "OMG SHITTT CHOMP I LOSE NOW, FUCKKK"??
Garchomp is so OU that it's so predictable. I don't see why you'd be afraid to switch in to any of your Physical walls.
Lets take a look at Garchomp's moves:
Outrage: I don't see Outrage threatening. It's probably the best late game move sweeper, but just switch in to a steel type like Magnezone and kill it w/ HP Ice. Don't forget that Outrage gets you locked in for 2-3 turns, giving you the oppurtinity to switch in to a set-up Pokemon like Bulky Gyara?
Dragon Claw: Way weaker than Outrage, which is good news for Gliscor, Donphan, Hippowdon. Don't be afraid of SD, because a SD-ed Claw won't be able to ohko Hippo, Gliscor, or Donphan. Donphan will be able to 2hko w/ Ice Shard, assuming that there's no Sandstream, Hippowdon can Roar it out or kill it w/ Ice Fang while it's setting up, Gliscor can 2hko w/ Ice Fang while it's setting up or Whirlwind it out
Earthquake: Numerous Pokemons can counter EQ, one of them would be Bronzong. Don't worry about Fire Fang, It's just Dragon Claw w/ 10 base damage more. (Dragon Claw 80+40=120(STAB)) (Fire Fang 65x2=130)
Draco Meteor: With Chomp's horrible Sp.Atk, what Special wall can't wall this?
here's more "possible counters":
Trick room team - A trick room team will make Garchomp's speed usless for a couple of turns, making Chomp a less threat
Rain Dance team - Makes Sand Veil useless, also makes Kingdra >>>> better than Garchomp
Adamant Cloyster(?) - Surprise Chomp by switching in to this Pokemon. let him think that you'd set-up spikes and shit. Then, watch him stay in and eat that Ice Shard. Cloyster's def should keep him alive even after switching in a CB Outrage
A Focus Sashed Pokemon w/ an Ice move - beware of stealth rock/sandstorm though
Hail team - Lead w/ Abomasnow and watch your opponent's sandstorm team freeze to death. Don't forget to carry a stall rein. Garchomp would sure be afraid to come out when its hailing for Blizzard would have 100% accuracy
IN CONCLUSION:
I don't see Garchomp as threatening as you guys make it sound like. Garchomp's moves are very predictable. A little bit of mind-games and predictability will beat Garchomp
The definition of overcentralizing the game is forcing everyone to make a team just to counter this one Pokemon. Remember, not everyone should make a hail team, or make a rain dance team or trick room team just to counter this one thing. That's overcentralizing. How many trick room teams do you see outside of Shoddy? Nonetheless, Garchomp can always switch out into Metagross, with or without agility, to take out trick roomers, as well as CB Ice Shards. If the opponent is CB Ice Sharder, Metagross gets a free Agility or a free attack. Focus Sash does not work due to sandstorm. And so, to counter this thing, an adamant Cloyster must be in place to counter it? Nobody should be force to have one of those on a team. Plus, it can't safely switch into Stone Edge or STAB Earthquake, as another STAB Earthquake can kill it with no doubt. Again, carrying a whole weather team (Rain Dance) is overcentralizing when dealing with this one Pokemon. And a Magnezone with HP Ice must be carried on a team just to deal with Garchomp's Outrage? How's that not overcentralizing?
Basically you're saying is that, if you're up against a Garchomp, you must: 1) Start with Abomasnow (killed by Fire Fang/Outrage), and hoping the other battler switch out Garchomp and have it killed before switching out his Sandstreamer, keeping your Abomasnow alive? That won't work.
2) Having HP Ice Magnezone on your team to take its outrage? That's overcentralizing.
3) If you have Adamant Cloyster, just to let you know that Adamant Garchomp does 85-100% damage with Outrage, 76-82% with Dragon Claw, and 94-111% with Earthquake. Jolly does a bit less, but can manage to OHKO, so basically if you want to switch it in, you HAVE to let another Pokemon faint. That's not a counter.
4) Trick Room: I explained above in the paragraph under your quote.
5) Outrage guarentees kill on Gliscor / Hippowdon after 1 SD.
6) Magnezone with HP Ice needed to counter Garchomp's outrage = Overcentralization.
7) Bronzong can't take SD Fire Fang. Same deal with Skarmory.
Check damage before posting next time.
And Kira, maybe AFTER Wobbuffet's test.