Well this isn't going to be too different from what is in the normal analysis, but I have a few specific issues with it. Toxic + Rest + Encore should absolutely always be on every Supporting Wall Shuckle, and Knock Off / Stealth Rock / Body Slam should be three possible options for the fourth slot.
http://www.smogon.com/dp/pokemon/shuckle
[SET]
Name: Supporting Wall
Move 1: Encore
Move 2: Rest
Move 3: Toxic / Stealth Rock
Move 4: Knock Off / Stealth Rock
Item : Leftovers
EVs: 252 HP / 208 Def / 48 SpD
Nature: Impish
Ability: Gluttony
[SET COMMENTS]
<p>This Shuckle has a physically defensive potential of 244 HP * 602 Def = 146888, and, in Sand, a specially defensive potential of 244 * (508 * 1.5) = 185928. To put this in perspective, Cresselia reaches a maximum special defensive potential of 174936, meaning Shuckle is 185928 / 174936 = 1.063, or 6.3% more specially sturdy than Cresselia. Forretress reaches a maximum defensive potential of 147264, or 147264 / 146888 = 1.0026, or just .3% more defensive than Shuckle. Shuckle is as defensively bulky as Forretress, and more specially bulky than Cresselia, making it arguably the best neutral mixed wall in the game (again, in Sand).</p>
<p>The EVs are designed to let Shuckle not be 2HKOed by Choice Specs Salamence's Hydro Pump on average, and to not be 3HKOed by Adamant Choice Scarf Garchomp's Outrage on average.</p>
<p>The reason Encore + Toxic + Rest is so effective on Shuckle is that Toxic + Rest allows Shuckle to take on a large majority of Pokemon one on one. The Poison, Steel, Substitute, and Rest + Sleep Talk Pokemon that would defeat the Toxic + Rest strategy are all debilitated by Encore, and essentially become "setup" bait for another sweeper on Shuckle's team.</p>
<p>Although the preferred set is Toxic + Rest + Encore + Knock Off, team needs frequently require Shuckle to carry Stealth Rock. In this case, either Toxic or Knock Off can be dropped, and neither is necessarily preferred over the other. While Toxic + Rest allows Shuckle to beat many Pokemon one on one, Knock Off allows Shuckle to remove the strategy of various Pokemon by removing their items. This is especially effective in Sand, as Knock Off will remove Leftovers on opposing Pokemon and allow residual damage to build much faster.</p>
http://www.smogon.com/dp/pokemon/shuckle
[SET]
Name: Supporting Wall
Move 1: Encore
Move 2: Rest
Move 3: Toxic / Stealth Rock
Move 4: Knock Off / Stealth Rock
Item : Leftovers
EVs: 252 HP / 208 Def / 48 SpD
Nature: Impish
Ability: Gluttony
[SET COMMENTS]
<p>This Shuckle has a physically defensive potential of 244 HP * 602 Def = 146888, and, in Sand, a specially defensive potential of 244 * (508 * 1.5) = 185928. To put this in perspective, Cresselia reaches a maximum special defensive potential of 174936, meaning Shuckle is 185928 / 174936 = 1.063, or 6.3% more specially sturdy than Cresselia. Forretress reaches a maximum defensive potential of 147264, or 147264 / 146888 = 1.0026, or just .3% more defensive than Shuckle. Shuckle is as defensively bulky as Forretress, and more specially bulky than Cresselia, making it arguably the best neutral mixed wall in the game (again, in Sand).</p>
<p>The EVs are designed to let Shuckle not be 2HKOed by Choice Specs Salamence's Hydro Pump on average, and to not be 3HKOed by Adamant Choice Scarf Garchomp's Outrage on average.</p>
<p>The reason Encore + Toxic + Rest is so effective on Shuckle is that Toxic + Rest allows Shuckle to take on a large majority of Pokemon one on one. The Poison, Steel, Substitute, and Rest + Sleep Talk Pokemon that would defeat the Toxic + Rest strategy are all debilitated by Encore, and essentially become "setup" bait for another sweeper on Shuckle's team.</p>
<p>Although the preferred set is Toxic + Rest + Encore + Knock Off, team needs frequently require Shuckle to carry Stealth Rock. In this case, either Toxic or Knock Off can be dropped, and neither is necessarily preferred over the other. While Toxic + Rest allows Shuckle to beat many Pokemon one on one, Knock Off allows Shuckle to remove the strategy of various Pokemon by removing their items. This is especially effective in Sand, as Knock Off will remove Leftovers on opposing Pokemon and allow residual damage to build much faster.</p>