Moves
Stealth Rock helps wear down opposing Pokemon over time. Spikes provides additional damage each time a grounded foe switches in, inflicting fairly large amounts of damage when multiple layers are up. Rock Blast allows Dwebble to knock out Pokemon like Abra and Surskit even if they are holding a Focus Sash. It also lets Dwebble hit opposing Weak Armor Pokemon like Vullaby and other Dwebble very hard. Knock Off broadens Dwebble's utility by allowing it to remove useful items like Berry Juice and Eviolite from foes like Tirtouga, Ferroseed, Timburr, and opposing Dwebble. Earthquake provides a coverage move to hit Steel-types like Pawniard super effectively, which otherwise wall Dwebble and can hit it super effectively in return.
Set Details
Weak Armor doubles Dwebble's Speed after it takes a physical attack, which makes it possible for Dwebble to set up more entry hazards. 236 EVs in Speed with a Jolly nature let Dwebble outspeed all Pokemon with 15 Speed, like Magnemite and Bunnelby. This also lets Dwebble outspeed all Pokemon in the tier, including Choice Scarf Users, after one Weak Armor boost. 76 EVs are placed in Defense to give Dwebble better bulk against for priority attacks like Mach Punch and Sucker Punch. For Weak Armor sets, these EVs also give Dwebble an extra point of Defense due to its item, Eviolite. The Eviolite itself gives Dwebble enough bulk to take hits like a Rock Slide from Drilbur and nearly always an Iron Head From Pawniard. The remaining EVs are put in Attack to help Dwebble hit as hard as possible. Only add the 36 extra HP EVs when not using SturdyJuice, as Dwebble will otherwise not be restored to full HP when Berry Juice activates. The combination of Sturdy and Berry Juice lets Dwebble take three hits in most cases. With 21 HP total, Dwebble will always be back at full health after Berry Juice activates. Eviolite should only be used with Weak Armor, and Berry Juice should only be used with Sturdy. Dwebble can run an alternate EV spread with 156 Special Defense EVs instead of Attack EVs to avoid being KOed by Staryu's Scald and Surskit's Hydro Pump most of the time.
Usage Tips
Dwebble is great when used as a lead to set entry hazards and remove the opposing lead's item. Be wary, however, of leading with Dwebble against an Onix, as Onix can use Taunt on Dwebble and proceed to KO it easily with Rock Blast. Dwebble can also function as a check to Flying-types due to either SturdyJuice or its raw Eviolite-boosted physical bulk and its ability to hit them super effectively with Rock Blast. It will, however, take a lot of damage from them, so be careful about relying solely on Dwebble to check them. Use Knock Off on predicted switch-ins like Timburr and Mienfoo to remove their Eviolites. If Dwebble is the SturdyJuice variant, it can sponge at minimum one hit from sweepers that have already set up—assuming there are no hazards on your side of the field—and potentially KO them with Rock Blast or Earthquake. Should it be unable to KO them, Dwebble can make it easier for other teammates to KO them by removing its item with Knock Off, lessening its bulk or recovery. This does not apply to Shellder, which can get around Sturdy. Dwebble can also switch in a couple times due to its recovery from Berry Juice and set up one layer of hazards each time if you wish—this does, however, make it unlikely that Dwebble will be able to set up multiple layers of hazards, since your opponent will easily be able to switch in a check or counter and KO Dwebble. Try not to switch in Dwebble on Fighting-types, as they can all reliably beat it one-on-one. You can, however, switch in Weak Armor variants to be able to reliably set up Stealth Rock. SturdyJuice Dwebble can switch into Stealth Rock when at a bit over half of its health to activate Berry Juice and heal back to full HP; try to take advantage of this to increase Dwebble's utility over the course of the battle.
Team Options
Spinblockers like Pumpkaboo-XL and Frillish are good teammates for Dwebble, as they can prevent its entry hazards from being removed. Similarly, Pawniard is a good teammate, as it deters opposing Pokemon from using Defog due to its ability Defiant. Dwebble prefers to keep Sturdy intact and does not like losing 25% of its HP from Stealth Rock every time it switches in, so Pokemon with access to Rapid Spin or Defog like Staryu, Drilbur, and Vullaby are great teammates for Dwebble. Spinners can remove hazards that would negatively affect Dwebble without removing the hazards that Dwebble sets, so they tend to be better teammates than Defoggers. Dwebble appreciates Pokemon that cover its weakness to Water-types, like Chinchou and Croagunk, and to Steel-types, like Ponyta or Mienfoo. Pokemon that force a lot of switches like Rufflet and Timburr will be able to make use of the chip damage that Dwebble's hazards provide. Finally, Dwebble's hazard setting ability helps wear down the opposing team over time, something that late-game cleaners like Abra, Carvanha, and Zigzagoon greatly appreciate.