Just so you know in advance, I didn't read half the posts here because they probably don't say anything of value. (I don't know that, though, since I didn't read them!) So just let me know if I'm repeating crap...
Anyone that says they'd stop running Steels, if Garchomp was banned, is a moron who shouldn't even be discussing such a serious competitive issue. Of course you still need a Steel Pokémon or two, are you just going to run max SpD Tyranitar to cover Specsmence? How do you handle DD/Outrage Dragonites? Steel is the only resistance against an otherwise very powerful offensive type in general and Garchomp is certainly not the only threat that uses it. Ice attacks still boast a broad range of coverage, including against the other two Dragons mentioned above. Aside taking Garchomp out of your own teams, a well-designed team shouldn't change all that much.
Porygon2 is completely awesome, I just wish it had the same stat total as PZ ala Scyther/Scizor. :( HP Electric [Water pogeys] are a joke, as is Charge Beam Cresselia even though nobody mentioned it yet. Don't.
Garchomp has no "hard" counter as good as P2 is for Gyarados, but there's plenty that will still scare him off in general. Cresselia is probably the most ubiquitous example since it's immune to Earthquake and threatens Ice Beam. Skarmory is self-explanatory. Gliscor utilizes Sand Veil too and takes less than 50% from Scarfed Outraged (and can at least survive one Swords Danced blow from those sets). Weavile and Mamoswine threaten STAB, often CBed Ice Shard. Deoxys-S can outspeed even Scarfed versions and OHKO with Ice Beam. Toxic Spikes is really, really good at countering the Sub/SD sets.
I could go on for another page listing everything that can possibly stop Garchomp or scare it away. Honestly, the only thing that makes Garchomp particularly more dangerous than any other heavy attacker is... Sand Veil. Letting SD versions get that Substitute up kills any of the offensive options for stopping it (Garchomp isn't that fast) or missing that Ice Beam that your Cresselia had to eat 75% to deliver is an extra death at best or a game-ender at worst, depending what else you have that can handle it. There's a reason Evasion moves are banned in standard play and no other pokémon so dangerous otherwise has a built-in Evasion trait.
That said, you still have 4/5 odds on getting through Sand Veil if your active pokémon can otherwise kill or disable Garchomp. (Especially if you're faster.) Sand Veil itself is only useful combined with Sand Stream, which is the more "broken" of the two traits anyway. :P (If Sand Stream wasn't permanent, which it really shouldn't be, Sand Veil would be nearly irrelevant. Don't ban Garchomp, ban T-Tar and Hippowdon! And Abomasnow!) Without the hax trait it's no more dagerous than Infernape or Lucario, use more weather moves if you hate it that much -- they're surprisingly useful. Hell, use Reflect!
Oh, and watch out for Waterfall flinches. Skarmory, and related stuff like Tpunch Dusknoir, are as reliable Gyarados counters as Ice Beam [pokémon] is to Garchomp with an active Sand Veil. ;o Gyarados can reach higher speeds and isn't susceptible to the Electric priority attack which doesn't exist. Stupid comparison to begin with, anyway.
PKMN1 is buffeted by the Sandstorm!
... (life ticks down) ...
PKMN1 recovered with its LEFTOVERS!
... (life ticks up) ...
PKMN2 is buffeted by the Sandstorm!
... (life ticks down) ...
PKMN2 recovered with its LEFTOVERS!
... (life ticks up) ...
~_~
Anyone that says they'd stop running Steels, if Garchomp was banned, is a moron who shouldn't even be discussing such a serious competitive issue. Of course you still need a Steel Pokémon or two, are you just going to run max SpD Tyranitar to cover Specsmence? How do you handle DD/Outrage Dragonites? Steel is the only resistance against an otherwise very powerful offensive type in general and Garchomp is certainly not the only threat that uses it. Ice attacks still boast a broad range of coverage, including against the other two Dragons mentioned above. Aside taking Garchomp out of your own teams, a well-designed team shouldn't change all that much.
Porygon2 is completely awesome, I just wish it had the same stat total as PZ ala Scyther/Scizor. :( HP Electric [Water pogeys] are a joke, as is Charge Beam Cresselia even though nobody mentioned it yet. Don't.
Just chiming in to say that Skiddle's absolutely right. If you have a Porygon2 on your team, Gyarados is nearly a non-issue. Gardevoir is also very good if it is appropriately EVed. Porygon2's utility isn't limited to being a Gyarados counter, either. With BoltBeam, Recover, and space for an additional support move (Toxic, Thunder Wave, Magic Coat), it's a solid team player.
No such Pokémon exists for Garchomp. Garchomp is also less predictable, has better stats, and has much better type coverage with its attacks. Please stop comparing the two.
Garchomp has no "hard" counter as good as P2 is for Gyarados, but there's plenty that will still scare him off in general. Cresselia is probably the most ubiquitous example since it's immune to Earthquake and threatens Ice Beam. Skarmory is self-explanatory. Gliscor utilizes Sand Veil too and takes less than 50% from Scarfed Outraged (and can at least survive one Swords Danced blow from those sets). Weavile and Mamoswine threaten STAB, often CBed Ice Shard. Deoxys-S can outspeed even Scarfed versions and OHKO with Ice Beam. Toxic Spikes is really, really good at countering the Sub/SD sets.
I could go on for another page listing everything that can possibly stop Garchomp or scare it away. Honestly, the only thing that makes Garchomp particularly more dangerous than any other heavy attacker is... Sand Veil. Letting SD versions get that Substitute up kills any of the offensive options for stopping it (Garchomp isn't that fast) or missing that Ice Beam that your Cresselia had to eat 75% to deliver is an extra death at best or a game-ender at worst, depending what else you have that can handle it. There's a reason Evasion moves are banned in standard play and no other pokémon so dangerous otherwise has a built-in Evasion trait.
That said, you still have 4/5 odds on getting through Sand Veil if your active pokémon can otherwise kill or disable Garchomp. (Especially if you're faster.) Sand Veil itself is only useful combined with Sand Stream, which is the more "broken" of the two traits anyway. :P (If Sand Stream wasn't permanent, which it really shouldn't be, Sand Veil would be nearly irrelevant. Don't ban Garchomp, ban T-Tar and Hippowdon! And Abomasnow!) Without the hax trait it's no more dagerous than Infernape or Lucario, use more weather moves if you hate it that much -- they're surprisingly useful. Hell, use Reflect!
Oh, and watch out for Waterfall flinches. Skarmory, and related stuff like Tpunch Dusknoir, are as reliable Gyarados counters as Ice Beam [pokémon] is to Garchomp with an active Sand Veil. ;o Gyarados can reach higher speeds and isn't susceptible to the Electric priority attack which doesn't exist. Stupid comparison to begin with, anyway.
I don't know if Yuki plays shoddy or wifi more, but I'm guessing wifi. I play wifi more, and Tyranitar is not used nearly as much. That may be the problem when trying to defend Garchomp. Obviously the wifi metagame is different than what it is on Shoddy.
PKMN1 is buffeted by the Sandstorm!
... (life ticks down) ...
PKMN1 recovered with its LEFTOVERS!
... (life ticks up) ...
PKMN2 is buffeted by the Sandstorm!
... (life ticks down) ...
PKMN2 recovered with its LEFTOVERS!
... (life ticks up) ...
~_~