Moves
Earthquake is Sandslash's STAB attack and cleaning tool, giving Sandslash very reliable damage output. Stone Edge lets Sandslash beat down Flying-types such as Charizard, Archeops, and Scyther while also allowing it to 2HKO Colbur Berry Xatu. Knock Off hits Ghost-types looking to block Rapid Spin and is a good coverage move in general due to its decent neutral coverage with Ground as well as its disruptive item removal effect. Swords Dance bolsters Sandslash's power and greatly improves its sweeping potential as well as its ability to punch holes into bulkier Pokemon, particularly by beating down the frailer Colbur Berry spinblockers with +2 Knock Off. Rapid Spin is a good option if Sandslash's team has many alternative sweepers, as it clears the field of entry hazards, particularly Toxic Spikes, which can be dangerous for its teammates.
Set Details
Maximum Attack investment maximizes Sandslash's damage output, enhancing its sweeping ability with Sand Rush. Maximum Speed investment and a Jolly nature allow Sandslash to outrun base 95 Speed Choice Scarf users such as Jynx, Haunter, and Primeape, as well as +2 Speed Adamant Barbaracle, after the Sand Rush boost. When outside of sand, Sandslash can outrun Hasty Abomasnow and neutral-natured Samurott and Ludicolo, as well as Speed tie with offensive Adamant Hitmonchan. An Adamant nature can be used for more power in exchange for failing to outspeed the likes of Choice Scarf Rotom, Jynx, Haunter and +2 Barbaracle. Sandslash can adopt an alternative bulkier spread, incorporating maximum Attack investment alongside an Adamant nature, 136 Speed EVs, and the remaining EVs into HP. This gives Sandslash more opportunities to set up Swords Dance and sweep while still allowing it to naturally outrun Adamant Aggron and outspeed up to Swellow with the aid of Sand Rush. Life Orb maximizes Sandslash's power and KO potential, but Earth Plate can be considered so Sandslash doesn't incur recoil damage, especially when using Rapid Spin.
Usage Tips
Sandslash should aim to sweep with Earthquakes, preferably Swords Dance-boosted ones, after the opposing team has been sufficiently weakened mid- to late-game. Sandslash can also throw out Earthquakes to weaken or take out bulky Rock- and Steel-types early-game if a Swords Dance boost isn't necessary, and it helps to maintain offensive presence as well as support Stoutland. It can gain Swords Dance opportunities by scaring out Pokemon it can OHKO, such as Pyroar, Magmortar, Garbodor, Skuntank, and Aggron, or against Pokemon that aren't strong enough to threaten it, such as Steelix, Regirock, and Clefairy. Sandslash can also be brought in directly on the likes of Regirock and non-Grass move Garbodor to start attacking or setting up. Sandslash can also use Rapid Spin if entry hazards need to be cleared to ease switching. Because spinning isn't a particularly high priority for Sandslash, the Sandslash user can afford to bluff the spin and lure in the opponent's spinblocker to get free turns or attacks off.
Team Options
Smooth Rock Hippopotas is absolutely mandatory as a teammate, as Sandslash badly needs Sand Rush active in order to function adequately. Stoutland is an important partner for Sandslash as well, as they complement each other well offensively and form a powerful, speedy core, with Stoutland functioning as the immediate holepuncher among the duo. Mesprit can be a very appealing teammate, as it has the bulk and Speed to be able to perform supportive roles such as Stealth Rock and Healing Wish, as well as being a switch-in for Fighting- and Ground-type attacks. Though novel, Mesprit can even act as a backup Sandstorm setter with Smooth Rock. Teammates that can deal with Pokemon that Sandslash, and by extension Stoutland, have difficulty breaking through are recommended. Powerful wallbreakers such as Magmortar, Charizard, Aurorus, Jynx, Shiftry, Will-O-Wisp + Hex Rotom, and Haunter can pummel the likes of Weezing, Gourgeist-XL, and Pelipper, while Sandslash can provide Rapid Spin support for most of these wallbreakers, which are weak to Stealth Rock. Aurorus even receives a Special Defense boost from sand, though it must obviously forgo Snow Warning. Attackers that resist Sandslash's weaknesses to Grass, Ice, and Water, or simply can help take special attacks for it, are especially notable partners.