Moves
Stealth Rock breaks foes' Focus Sash and Sturdy as well as weakening them for Corsola's teammates. Recover allows Corsola to regain its health and can help it stall foes until they are KOed by Toxic or another status condition. Scald is Corsola's only attacking option and offers chip damage and the potential to burn a foe, which can stop physical attackers in their tracks. Toxic weakens foes to the point where Corsola can stall them out or a teammate can come in to take them out. Toxic is also beneficial to take on Grass- and Water-types that try to switch in against Corsola.
Set Details
Maximum HP and Special Defense EVs allow Corsola to function as a specially defensive wall and better take on special attackers such as Floatzel and Kadabra. Leftovers offers a bit of recovery per turn, which can be important when paired with Recover. Regenerator restores Corsola's health as it switches out, allowing it to come back onto the field with more HP.
Usage Tips
If Corsola is on the field with low HP and you need to save it to take on a threatening Pokemon, switch it out if possible to allow for a Regenerator boost. Just because this Corsola set uses Stealth Rock doesn't mean that you always have to use it as your lead, although setting up Stealth Rock is its primary objective. If needed, before Corsola sets up Stealth Rock, it can opt to go for Toxic or Scald against a setup sweeper or when you predict a threatening or bulky Pokemon to switch in. After it sets up its entry hazard, Corsola should attempt to weaken the opposing team with Scald and Toxic. Attempt not to get Corsola statused, as it can get weakened fairly easily when afflicted with Toxic or a burn. Corsola can switch into threatening Pokemon in the metagame such as Kadabra, Floatzel, and Simipour.
Team Options
Corsola fits best on defensive teams, as it lacks an offensive presence and needs teammates to support it, in taking on status and super effective hits. Grass-types such as Gogoat, Roselia, Gourgeist-XL, and Tangela assist Corsola by resisting Electric-, Ground-, and Grass-type moves, while Corsola resists Fire- and Ice-type moves for them. Electric-types such as Stunfisk and Rotom-F can take on Electric-type moves for Corsola, although they share a weakness to Ground-type moves, bar Rotom-F. Rotom-F can also damage Grass- and Ground-types with Blizzard. Ghost-types such as Misdreavus and Gourgeist-XL can take on Ground- and Fighting-types, which threaten Corsola. Flying- and Fire-types such as Jumpluff, Dodrio, Ninetales, and Simisear can take on Grass-types for Corsola. Rest users such as Zweilous and Munchlax can absorb status for Corsola and allow it to survive longer, although Munchlax and Zweilous have to be running a RestTalk set to do so. Similarly, clerics such as Grumpig and Audino can heal off Corsola's status. Setup sweepers such as Duosion, Clefairy, and Klang appreciate Corsola's entry hazards, which weakens the opposing team. Quilladin and Roselia can set up Spikes, which work well in conjunction with Stealth Rock in weakening foes. Misdreavus and Gourgeist-XL can block foes from removing Corsola's Stealth Rock with Rapid Spin, while Pokemon such as Grumpig and Zweilous appreciate entry hazards and status from Corsola, as they can force a switch with Whirlwind and Dragon Tail, respectively.