
[OVERVIEW]
Diancie's great typing lets it switch in easily against common dangerous Fire- and Flying-, and Normal-types such as Chandelure, Talonflame, Oricorio-E, and Porygon-Z. With well-rounded stats, Diancie can easily go both offensive and defensive, with its sets being supported by its large movepool. Specially defensive Diancie is a great check to special wallbreakers like Chandelure, Kilowattrel and Hisuian Typhlosion, and it can carry Encore to circumvent its passivity when against setup sweepers. Trick Room sets can easily turn the tables versus faster, more offensive teams, as Diancie can outspeed and KO everything after it gets its Special Attack boost from Meteor Beam.
[SET]
name: Special Wall
move 1: Stealth Rock
move 2: Diamond Storm
move 3: Body Press
move 4: Encore / Moonblast
item: Leftovers
ability: Clear Body
nature: Sassy
evs: 252 HP / 4 Def / 252 SpD
tera type: Water / Steel / Dragon
[SET COMMENTS]
Set Details
====
With a specially defensive EV spread, Diancie is able to repeatedly switch into special attacks, giving it opportunities to set up Stealth Rock and fire off STAB Diamond Storm. Body Press hits Steel-types like Copperajah and Registeel trying to switch in on Diancie, and it can take advantage of Diamond Storm's chance to boost its Defense. Encore prevents Diancie's passivity from getting taken advantage of too easily by opposing hazard setters and setup sweepers, such as Klefki and Iron Thorns alike, but Moonblast can be used to be able to hit Ground-types like Swampert and Flygon harder. Tera types for this set are focused on flipping Diancie's matchups. Tera Water gives Diancie a resistance to Steel- and Water-type attacks, letting it finish off Copperajah and Inteleon while maintaining its Fire resistance. However, Tera Steel trades Diancie's matchup against Fire-types for a strong defensive typing thay can take on hits from Munkidori, Sylveon, and Tsareena without issue. Tera Dragon on the other hand lets Diancie take on Rotom-C and Araquanid, but it completely throws away its matchup against Dragalge and Florges.
Fire-types like Incineroar and Talonflame make for strong partners because they threaten Steel- and Grass-types that force Diancie out, such as Bronzong, Registeel, Tsareena, and Brambleghast. The aforementioned Grass-types, along with Rotom-C, also have great synergy with Diancie, as it checks Fire- and Flying-types for them. In return, they handle Ground- and Water-types like Flygon, Swampert, and Inteleon. Diancie can't take on physical wallbreakers like Toxicroak and Mienshao too well, so physically defensive Pokemon like Swampert, Dragalge, and Talonflame pair well with it to help check these threats.
[SET]
name: Offensive Trick Room
move 1: Trick Room
move 2: Meteor Beam
move 3: Moonblast
move 4: Earth Power
item: Power Herb
ability: Clear Body
nature: Quiet
evs: 252 HP / 252 SpA / 4 SpD
tera type: Grass / Ground
[SET COMMENTS]
Set Details
====
With an offensive spread, the Trick Room set is capable of taking down many foes. Earth Power offers coverage for the Steel -and Poison-types that can take Diancie's Moonblast comfortably such as Registeel, Copperajah, and Tentacruel. Power Herb allows Diancie to immediately attack and get its Special Attack boost with Meteor Beam. Tera Grass gives Diancie a resistance to Grass-, Ground-, and Water-type attacks while giving it a neutrality to Steel-type moves, letting it set up Trick Room and attack more easily. Alternatively, Tera Ground is an option to boost Earth Power's damage, which is really appreciated to get KOs it wouldn't otherwise.
A lead to set up entry hazards such as Brambleghast or Froslass makes for a great partner, as it can help chip checks like Registeel, Alolan Muk, and Tentacruel into range for a KO. Mienshao and Breloom enjoy how Diancie can come in on and take advantage of Talonflame, and with it being downed, they don't need to worry about being revenge killed as easily or getting burned. Pokemon like Flygon, Drednaw, Oricorio-E, Galarian Articuno, and Iron Thorns that can chip away at and weaken Steel-types like Registeel and Copperajah for Diancie pair well with it too.
[STRATEGY COMMENTS]
Other Options
====
Diancie can run Rock Polish for a more permanent Speed boost, but with its low-base Speed, it's easily outpaced by Choice Scarf users like Flygon, Inteleon, and Mienshao even after it boosts. A Sticky Web setter is great for this set, as it attempts to solve Diancie's low speed issue.
If there is already a Stealth Rock user on Diancie's team, it can run Spikes instead so that it can continue to provide entry hazard support. Specially defensive sets can run a more specially oriented moveset, with moves like Moonblast, Earth Power, and Power Gem being run over Diamond Storm and Body Press. Diancie can also run a sweeper set with a moveset of Calm Mind / Iron Defense / Draining Kiss / Stored Power, which can take advantage of passive or weaker Pokemon quite well, but it can be easily overpowered by any wallbreaker or Trick, Encore and Taunt users.
Diancie can also run offensive sets with Stealth Rock and Spikes, usually with Moonblast and Earth Power supporting it; however it is considered a bit suboptimal, since its bulk is usually appreciated to set entry hazards up safely.
Checks and Counters
====
**Steel-types**: Bulky Steel-types like Bronzong, Registeel, and Copperajah can easily switch in on Diancie and set up entry hazards, forcing it out or making it use Tera in order to survive an attack and KO them. In particular, Bronzong is quite bothersome for Diancie, as it walls its STAB attacks and is immune to Earth Power thanks to Levitate. However, all of these Steel-types lack a form of reliable recovery making them easily overwhelmed over the course of a battle. Both Bronzong and Registeel take a lot of damage from +2 Body Press and +1 Earth Power, respectively, so after some chip damage, Diancie can beat them.
**Ground-types**: Flygon, Swampert, and Gastrodon are trouble for Diancie, as they threaten Diancie out with their Ground-type STAB attacks and can take advantage of it by setting up entry hazards. If Diancie is running Moonblast, it can somewhat damage them, but if its not, it is an almost free switch-in for them, as Earth Power and Body Press aren't doing enough to threaten them.
**Water-types**: Offensive or defensive Water-types such as Inteleon, Basculegion, and Vaporeon can all threaten Diancie with their STAB attacks. They can also use Diancie for momentum and pivot with U-turn or Flip Turn, and they can even force Diancie to Terastallize or switch out. Inteleon and Basculegion both cannot deal with Diancie when under Trick Room, as they get defeated before they can act.
**Grass-types**: Offensive Grass-types such as Torterra and Tsareena make progress against and threaten Diancie; however they can't comfortably switch in on offensive sets. Torterra and Tsareena force Diancie to switch out or Terastallize, and the latter can even remove its Stealth Rock with Rapid Spin. Both of those Pokémon can't defeat Diancie when in Trick Room, as they get KOed first by +1 Moonblast
[CREDITS]
Written by:
https://www.smogon.com/forums/members/havocknight.644300/
Quality checked by:
https://www.smogon.com/forums/members/powerofmemes.583607/
https://www.smogon.com/forums/members/tuthur.369076/
Grammar checked by: https://www.smogon.com/forums/members/adorluigi.528364/
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