Moves
Sticky Web provides support for Shuckle's teammates, slowing down all of the opponent's grounded Pokemon, which can help against faster threats and allows the team to more efficiently overwhelm the opponent. Stealth Rock is another way for Shuckle to help out its teammates, weakening foes as they switch. This is especially useful against Flying-types like Swanna, which are immune to Sticky Web, and bulkier teams that do not mind the Speed decrease. Encore can lock Pokemon such as Mudsdale and Regirock into moves like Stealth Rock so that Shuckle can set up its entry hazards more easily. It also gives Shuckle a way to deal with foes that may try to set up on it such as Carracosta, but Shuckle should stay wary of Z-Move users like Alolan Raichu and Lycanroc, which can bypass Encore for a turn. Toxic gives Shuckle a way to deal a decent amount of damage over time and can be used to whittle down bulkier foes such as Spiritomb and Eelektross that can potentially give its teammates trouble. Knock Off is another way to weaken these bulkier threats, as well as Eviolite users like Clefairy and Ferroseed. It can also cripple Choice Scarf users like Primeape, as its Choice Scarf would otherwise cancel out Sticky Web's Speed decrease. Finally, Infestation traps Pokemon Shuckle can use as setup fodder such as Kangaskhan. It goes well with Encore, as it can trap Pokemon that are locked into a preferred move. It also deals some chip damage each turn, giving it a similar effect to Toxic, albeit less intense. Both Knock Off and Infestation are notably not stopped by Taunt.
Set Details
Maximum EVs in HP and Special Defense with a Calm nature allow Shuckle to better take special hits from Pokemon such as Aurorus so it can more reliably set up entry hazards. Mental Herb gives Shuckle one-time protection from Taunt and Encore users like Sableye, Alolan Persian, and lead Aurorus, which almost guarantees it will be able to set up at least one of its hazards. Sturdy further ensures this, allowing it to take at least one hit from powerful attackers that could otherwise OHKO Shuckle like Choice Band Aggron, as well as potential critical hits.
Usage Tips
Shuckle is a dedicated lead, so it should be sent out first to get up its entry hazards as soon as possible. Against opposing balance and offense, its primary goal should be to set up Sticky Web before Stealth Rock, as its teammates will often benefit from the foes' Speed drops. However, if facing a more defensive team, Stealth Rock should be your priority, as bulky Pokemon care little about Sticky Web's Speed decrease. Shuckle can be used as an outright suicide lead if you do not fear the opponent's hazard removal. In this case, if it manages to set up both hazards, it should use its remaining turns to utilize its support moves like Toxic and Knock Off to cripple the opposing team as much as it can. On bulky offense teams, after setting up hazards, Shuckle can be withdrawn and saved for later to reset the hazards if need be, utilize its support moves, check certain threats, or simply be used as death fodder. A similar strategy can be used if Shuckle is matched up against a Pokemon such as Floatzel, as due to the predictability of leading Shuckle, the opponent may try to lead with a Pokemon that has a good matchup against it. Another option in such situations is to not lead with Shuckle but instead lead with a Pokemon that has a better matchup while saving Shuckle for a later opportunity to switch in and set up the hazards. If the opponent leads with a Pokemon that can potentially set up, like Calm Mind or Stealth Rock Clefairy or Shell Smash Carracosta, Encore is an option to go for first turn. Shuckle can use the locked foe as a chance to set up its hazards, or even disable them from switching with Infestation. This can also be used as an opportunity for Shuckle to switch into a more offensive teammate. However, be wary that the opponent may just switch out for a better matchup, making Encore fail altogether. Finally, Shuckle can help against Trick Room and weather teams, as it can utilize its low Speed to Encore the opposing lead into moves like Rain Dance and Stealth Rock, and even trap them with Infestation to waste turns. Weather teams also do not appreciate Sticky Web.
Team Options
Shuckle should be run on Sticky Web-based offensive teams. Such teams generally include decently fast setup sweepers, such as Carracosta and Omastar, that can take advantage of the Sticky Web to more easily sweep with less fear of being outsped. Faster setup sweepers such as Oricorio-E, Dodrio, and Simisear and other faster Pokemon such as Floatzel similarly appreciate being able to more reliably outspeed foes, specifically Choice Scarf users like Primeape. Finally, slower wallbreakers such as Stoutland and Victreebel benefit from Sticky Web, as they can supply immediate power without having to fear being easily revenge killed. Primeape and Pawniard both run Defiant, which allows them to switch in against and take advantage of Defog users like Skuntank and Silvally-Fairy. They also often pressure the opponent into being more hesitant to use Defog altogether. Ghost-types like Oricorio-G and Jellicent can block the other form of entry hazard removal in Rapid Spin and can help against Defiant Primeape. Although they take a decent amount from Stealth Rock, Flying-types like Swanna and Oricorio-G are immune to Sticky Web, making them large threats to these teams. Therefore, Pokemon that can check them such as Cryogonal can come in handy.