
Note: I didn't know there was a discussion already done.
Ever since the Garchomp's tier was changed from OU to Uber around November/December 2008, today's metagame has never been the same.
For those of you who don't know, most of the information is from Smogon University, Serebii, Marriland and Google Images. xp

The Mach Pokémon. When it folds up its body and extends its wings, it looks like a jet plane. It flies at sonic speed. It flies at speeds equal to a jet fighter plane. It never allows its prey to escape.
Weight: 6'03"
Weight: 209.4lbs
Evolution: Gible -> Gabite -> Garchomp
Type: Ground & Dragon
Base Stats: 108 HP / 130 Attack / 95 Defence / 80 Special Attack / 85 Special Defence / 102 Speed
Ability: Sand Veil - Evasion increases by 20% in a Sandstorm
For any of us who have been here while Garchomp was in its heydays we have experienced the large change in the teams and metagame since then. If you battled in serebii, you wouldn't go two battles in a row without seeing Garchomp. So what has made this land shark so popular? *cough*other than his awesome looks.*cough*

Its low special attack is not a problem for this pokemon, considering the later observed moveset. Garchomp is 14th place with the highest attack of all pokemon and 5th, tied with Ho-oh, with highest attack in uber. (14th place is tied with 10 other pokemon at 130Atk, including Scizor.)
And its speed? Having a base stat of 102, it gives it another upper hand above those pokemon with only 100 in base speed. (Ex. Salamence, Jirachi, Celebi, Ninetales, Charizard, Zapdos, Mew.) And a good chunk of evs put into speed and it can potentially be faster than some Infernapes.

Don't have heart scales or the aptitude to breed? Quite alright! Garchomp still has more STAB dragon moves in which are of great use. Dragon Claw, a reliable move that has a good power of 80. Dragon rush, power of 100 and may cause flinching but fruitless due to its poor 75 accuracy. (Although it worked great for me.) And decided to go special Chomp? Go for the popular Draco Meteor and Dragon Pulse. Did I miss something? Perhaps the fact that it can also learn Stone Edge, Fire Fang, Crunch, Substitude, Iron Head, Stealth Rock, Body Slam and Swords Dance so you can tag this on and have its evs place into another stat.
And that isn't the end of what made this significant pokemon even more dangerous. If you don't have a pokemon in your team with Sandstream, then teach your Garchomp Sandstorm at lv.13 and its evasion will increase by 20%. Luck on your side? I think so. If your land shark is still getting taken down, add on a Yache or Haban Berry to decrease the power of Ice or Dragon hits you take.
Oh, I'm sorry did I miss something? If so, feel free to remind me! heart
To summarize: Garchomp has total base of 600, a prodigious moveset for it and an opportunity to hax out your opponent! (So I don't get any complaints, hax = luck.)
Now that you have, or probably not, read all of that;;; Do you think it's fair that our blue monster was sent to the Uber Tier?
After all... Garchomp used to be number #1 in the list of most used pokemons.
Written By: Vixanz
(NOTE TO CREW: I have no idea where to put this so you can move it as you wish, just pm/comment as to where it will be. Thanks~)