Well, this is my first Peer edit, so I appologize in advance for any grammatical errors, and technical errors. I know that people dont usually play Adv too often anymore, but i still think its worth it to add on even for the small population(and a fair amount of them play [UU]). Now, i know there is a small write up at the bottom of the page for counter, but i dont think it does it justice, especially without EV help and Calculations. I realize "we dont want write ups for one more move", but these EVs, and playstyle are very very different from the squishy Swords Dance/Spinner sets, while keeping the general usefullness of Sandslash, which is STAB Earthquakes.
http://www.smogon.com/rs/pokemon/sandslash
[SET]
name: CounterSlash
move 1: Swords Dance
move 2: Earthquake
move 3: Counter
move 4: Rock Slide / Hidden Power Bug / Hidden Power Ghost
item: Leftovers
nature: Adamant
evs: 252 HP / 72 Atk / 36 SpD / 148 Spe
[SET COMMENTS]
<p>This set is designed to specifically counter some of the biggest threats in the UU metagame, while still being able to get most of the 2HKOs and OHKOs that it needs to. Counter is a great addition to the sweeper set, as it allows Sandslash to destroy many of the grass pokemon which normally stop it, since to their strongest move is Hidden Power Grass, which can be countered. The basic strategy is to bring Sandslash in on a weak physical attack such as rock slide, or any electric attack. Swords Dance on the switch and then start sweeping. This set allows you to take out Blastoise, Walrein, and Meganium - all common switch-ins to sandslash -and continue sweeping what you can. Greedy Gligars also get taken out it they try to KO with only +2 or +4 Atk (depending on EVs and nature of the Gligar).</p>
<p>Another bonus is that with the 252 HP EVs, and 36 SpD EVs you always survive various STAB Surfs and Ice Beams, while being faster and and being able to 2HKO. For example, you can Swords Dance on your opponent's switch to Walrein or Blastoise, and then hit it for a 2HKO with Rock Slide (only on Walrein) or Earthquake, and live through the Surf / Ice Beam to hit them for the KO. Additionally, Sandslash will always survive a Timid Manectric's Hidden Power even after a Petaya boost, as well as almost always surviving a Timid Electabuzz's Ice Punch after a Petaya boost.</p>
<p>Rock Slide is the preferred move in the 4th slot, because it has the flinch rate, and Sandslash is able to outspeed most walls. It also allows Sandslash to take out fliers and Levitators that would not take themselves out with Counter, such as Misdreavus and Xatu, but more importantly, Altaria (which is outsped by this variant of Sandslash, allowing you to Rock Slide and possibly flinch before you get hit with Haze or Perish Song). Furthermore, it helps with Scyther and Yanma, not allowing them to set up while you try to Counter. Hidden Power Bug hits Grass types that do not attack with Hidden Power Grass, such as Bellosom and Tangela, and can hit Meganium hard if it uses Light Screen or Leech Seed. Hidden Power Bug also hits Solrock / Lunatone for super effective damage. Hidden Power Ghost, on the other hand, hits not only the previously mentioned Lunatone / Solrock for super effective damage, but also Misdreavus and Xatu as well. Counter takes care of Fearow, so it is not a big trouble if it walls those two attacks. It should be noted, however, that Rock Slide does have lower accuracy than Hidden Power</p>
I notice it is long, im not sure how to shorten it without leaving anything out though...
Alternate names could be welcome, because this sandslash not only is used for the move "Counter", it can get rid of a teams Bulky water, special sweepers and other walls. I'd almost suggest the name "SuperSlash" :D.

http://www.smogon.com/rs/pokemon/sandslash
[SET]
name: CounterSlash
move 1: Swords Dance
move 2: Earthquake
move 3: Counter
move 4: Rock Slide / Hidden Power Bug / Hidden Power Ghost
item: Leftovers
nature: Adamant
evs: 252 HP / 72 Atk / 36 SpD / 148 Spe
[SET COMMENTS]
<p>This set is designed to specifically counter some of the biggest threats in the UU metagame, while still being able to get most of the 2HKOs and OHKOs that it needs to. Counter is a great addition to the sweeper set, as it allows Sandslash to destroy many of the grass pokemon which normally stop it, since to their strongest move is Hidden Power Grass, which can be countered. The basic strategy is to bring Sandslash in on a weak physical attack such as rock slide, or any electric attack. Swords Dance on the switch and then start sweeping. This set allows you to take out Blastoise, Walrein, and Meganium - all common switch-ins to sandslash -and continue sweeping what you can. Greedy Gligars also get taken out it they try to KO with only +2 or +4 Atk (depending on EVs and nature of the Gligar).</p>
<p>Another bonus is that with the 252 HP EVs, and 36 SpD EVs you always survive various STAB Surfs and Ice Beams, while being faster and and being able to 2HKO. For example, you can Swords Dance on your opponent's switch to Walrein or Blastoise, and then hit it for a 2HKO with Rock Slide (only on Walrein) or Earthquake, and live through the Surf / Ice Beam to hit them for the KO. Additionally, Sandslash will always survive a Timid Manectric's Hidden Power even after a Petaya boost, as well as almost always surviving a Timid Electabuzz's Ice Punch after a Petaya boost.</p>
<p>Rock Slide is the preferred move in the 4th slot, because it has the flinch rate, and Sandslash is able to outspeed most walls. It also allows Sandslash to take out fliers and Levitators that would not take themselves out with Counter, such as Misdreavus and Xatu, but more importantly, Altaria (which is outsped by this variant of Sandslash, allowing you to Rock Slide and possibly flinch before you get hit with Haze or Perish Song). Furthermore, it helps with Scyther and Yanma, not allowing them to set up while you try to Counter. Hidden Power Bug hits Grass types that do not attack with Hidden Power Grass, such as Bellosom and Tangela, and can hit Meganium hard if it uses Light Screen or Leech Seed. Hidden Power Bug also hits Solrock / Lunatone for super effective damage. Hidden Power Ghost, on the other hand, hits not only the previously mentioned Lunatone / Solrock for super effective damage, but also Misdreavus and Xatu as well. Counter takes care of Fearow, so it is not a big trouble if it walls those two attacks. It should be noted, however, that Rock Slide does have lower accuracy than Hidden Power</p>
I notice it is long, im not sure how to shorten it without leaving anything out though...
Alternate names could be welcome, because this sandslash not only is used for the move "Counter", it can get rid of a teams Bulky water, special sweepers and other walls. I'd almost suggest the name "SuperSlash" :D.