Arceus-Fairy is a staple within the Anything Goes metagame thanks to its great offensive and defensive typing, expansive movepool and impressive natural bulk. Due to this, it can reliably take on many potent threats within the metagame such as Marshadow, Mega Sableye, Yveltal and Zygarde-C. The ability to check these Pokemon makes Arceus-Fairy incredibly useful on balance teams that are often threatened by them otherwise. Arceus-Fairy's extensive movepool also allows it to be relatively unpredictable, with access to a plethora of coverage and status moves. This allows Arceus-Fairy to take on or impair most threats without much difficulty. However, Arceus-Fairy's crippling weakness to both Shadow Tag users limits its potential significantly. Additionally, while Fairy-type is often a great offensive typing, Arceus-Fairy is limited in its offensive capabilties by Necrozma-DM, which counters it. Arceus-Fairy is also heavily impaired by the myriad of other Steel-types in the metagame, in addition to Ho-Oh, Primal Groudon and Arceus-Poison.
move 1: Judgment
move 2: Recover
move 3: Stealth Rock / Defog
move 4: Toxic / Will-O-Wisp
item: Pixie Plate
evs: 240 HP / 180 Def / 88 Spe
Judgment is Arceus-Fairy's strongest STAB move, allowing it to OHKO Marshadow, Yveltal and Mega Rayquaza after Stealth Rock damage while doing substantial damage to Zygarde-C and Giratina. Recover ensures Arceus-Fairy can preserve its health throughout the match to allow for repeated switch-ins to attacks such as Yveltal's Oblivion Wing. Stealth Rock is a great option as Arceus-Fairy is able to force out Mega Sableye as well as Yveltal, which may be equipped with Defog. Defog can be slotted onto Arceus-Fairy if hazard removal is hard to fit; however, its weakness to common trappers and hazard setters makes it a subpar option. Toxic allows Arceus-Fairy to deal with common switch-ins Ho-Oh and Primal Groudon, ensuring these Pokemon cannot come in freely. Will-O-Wisp provides Arceus-Fairy with a way to impair Necrozma-DM and other Steel-types, but is usually less useful than Toxic, as Necrozma-DM still threatens Arceus-Fairy and other Steel-types can shrug off the burn damage with Leftovers and Leech Seed.
240 HP and 180 Defense EVs, coupled with a Bold nature allows Arceus-Fairy to repeatedly switch-in on Zygarde's Thousand Arrows, Marshadow's Spectral Thief and other common physical attacks without much concern. 88 Speed enables Arceus-Fairy to outspeed max speed neutral-natured base 99s, which include Xerneas and primarily Yveltal. If outspeeding Yveltal isn't a major concern, investing the Speed EVs into HP and Defense can make Arceus-Fairy's matchup against Life Orb Mega Rayquaza much better, as maximum HP and maximum Defense allow Arceus-Fairy to live a +1 Dragon Ascent much more often after Stealth Rock. Alternatively, Arceus-Fairy can run the same set with 248 HP / 8 SpA / 252 Spe, with a Timid Nature to outspeed Mega Rayquaza and Speed tie with other Timid Special Arceus formes. Pixie Plate gives Arceus-Fairy's already potent Judgment a slight boost.
Use Arceus-Fairy's defensive typing strategically by switching into Pokemon it resists and capitalising on opportunities to spread status and set or remove hazards. Utilize Recover to carefully preserve Arceus-Fairy throughout the match. Play Arceus-Fairy extremely carefully against teams with Shadow Tag users such as Mega Gengar and Gothitelle as letting it get trapped by either almost always results in Arceus-Fairy fainting. Prevent Arceus-Fairy from gaining a status ailment as it won't be able to reliably check Pokemon it would normally have no issue with. If opposing Mega Rayquaza are revealed to by holding a Choice Scarf or Lum Berry, keep Arceus-Fairy healthy so it can be used as a check. Avoid revealing Will-O-Wisp against opposing teams by not revealing unless sure of Necrozma-DM or another Pokemon that does not appreciate being burned switching in.
Pursuit-trappers such as Tyranitar and Marshadow can remove common Mega Gengar sets that would otherwise make Arceus-Fairy a lot worse from matchup. Pokemon that can reliably check Necrozma-DM such as Arceus-Dark, Arceus-Water and Yveltal are good teammates as Arceus-Fairy can use a turn to perform whatever function is required, while not worrying about a potential Necrozma-DM switch-in. Reliable checks for Primal Groudon such as Zygarde-C and Arceus-Ground make for good teammates as they can deal with one of Arceus-Fairy's biggest shortcomings. Primal Groudon is an excellent option as it can capitalise off of Steel- and Poison-types that appreciate Arceus-Fairy's inability to hit them both. Primal Groudon also benefits from having Arceus-Fairy as a teammate due to its weakness to both Yveltal and Zygarde-C, which Arceus-Fairy can take on fairly easily. Gothitelle can remove bulky Steel-types and Arceus-Poison for Arceus-Fairy, so that it can freely use Toxic without concern. Reliable defensive answers to Mega Rayquaza such as Arceus-Rock and Tyranitar are incredibly useful as Arceus-Fairy is unable to switch-in to both Choice Band and Life Orb variants. Ghost-types like Mega Gengar and Lunala appreciate Arceus-Fairy's ability to efficiently and repeatedly switch-in on Yveltal; whereas Mega Gengar specifically also appreciates Arceus-Fairy's matchup versus Zygarde-C. Primal Kyogre can handle many of Arceus-Fairy's common checks well, but can miss out on Blissey, Chansey and Ferrothorn depending on which set it runs.
name: Calm Mind
move 1: Judgment
move 2: Calm Mind
move 3: Recover
move 4: Earth Power / Fire Blast
item: Pixie Plate
evs: 248 HP / 8 SpA / 252 Spe
Judgment is Arceus-Fairy's most powerful attack, with boosts from STAB and Pixie Plate both solidifying its necessity. Calm Mind allows Arceus-Fairy to boost both its Special Attack and Special Defense, so that it can more easily break through offensive teams. Recover provides longevity for Arceus-Fairy so that it can't be whittled down by repeated attacks. Earth Power gives Arceus-Fairy to hit Primal Groudon and Mega Gengar for maximum damage. Fire Blast is Arceus-Fairy's best option to hit Celesteela, Ferrothorn and Skarmory, even OHKO-ing the latter two after a single Calm Mind. It also s Arceus-Fairy's best option to hit Necrozma-DM; however, this still requires boosts to do substantial damage. Flamethrower is another option over Fire Blast for improved accuracy; however, it has an even harder time against Celesteela and Necrozma-DM.
Maximum Speed with a Timid Nature allows Arceus-Fairy to outspeed Mega Rayquaza and Speed tie with opposing Arceus formes. Maximum HP gives Arceus-Fairy the ability to live a Choice Band boosted Dragon Ascent from Mega Rayquaza while also allowing it to take on Marshadow and Zygarde better. Calm Mind Arceus-Fairy can instead run a spread of 108 Def / 148 SpA / 252 Spe with a Timid Nature to have a 98.8% chance to 2HKO opposing support Arceus formes after a single Calm Mind, while still living a Choice Band Mega Rayquaza Dragon Ascent, but sacrificing overall bulk usually isn't worth it. Pixie Plate boosts Judgment slightly, whereas any other item would make Arceus and/or Judgment Normal-type.
Try to remove Arceus-Fairy's defensive switch-ins like Necrozma-DM before setting up with Arceus-Fairy, as Arceus-Fairy is unable to reliably break it. Use Arceus-Fairy to switch into Pokemon it checks such as Marshadow and Zygarde if required before potentially setting up in the late game. Play carefully around Shadow Tag users, using Calm Mind when necessary. Even though Mega Gengar can't break through Arceus-Fairy after multiple uses of Calm Mind. It can still use its utility moves such as Taunt, Disable or Destiny Bond to ensure Arceus-Fairy is removed. Avoid getting hit by Toxic or Thunder Wave as these status conditions can make Arceus-Fairy a lot less effective for the remainder of the match.
Offensive checks to Necrozma-DM and Primal Groudon such as Life Orb Yveltal and Swords Dance Ground Arceus make for great teammates as they allow Arceus-Fairy to sweep easier in the late game. Necrozma-DM appreciates having Arceus-Fairy as a team member due to its ability to cover Yveltal and Arceus-Dark efficiently, whereas Necrozma-DM can switch-in on Arceus-Poison and multiple common Steel-types to aid Arceus-Fairy. Primal Groudon is also an effective teammate as it can deal with Steel- and Poison-types that force Arceus-Fairy out, while also dealing with Pokemon that can overwhelm Arceus-Fairy with special moves such as Primal Kyogre or Geomancy Xerneas. Arceus-Rock or Tyranitar can be used to reliably check Ho-Oh which walls Arceus-Fairy. Calm Mind Arceus-Fairy appreciates having hazard support to allow it to sweep more easily. Stealth Rock from Primal Groudon or a support Arceus forme is extremely beneficial to have. A setter of Spikes is also very useful; however, due to its limited distribution it may be difficult to fit. Mega Rayquaza can remove many of the Steel-types that can switch-in on Arceus-Fairy, while also dealing with Primal Groudon and Ho-Oh relatively well.
A lead set can be ran with extra utility over Recover to take advantage of Arceus-Fairy's ability to force out Magic Bounce users like Mega Sableye to reliably set up Stealth Rock. This set often includes Judgment, Stealth Rock, Roar and Toxic. Stone Edge can be used to lure Ho-Oh; however, without significant Attack investment, Arceus-Fairy struggles to OHKO even offensive variants. Perish Song can be slotted on the Support set to deal with Baton Pass teams efficiently, especially if they lack Mr. Mime. Roar can be ran on the Support set without sacrificing recovery to deal with opposing set up sweepers and Gothitelle. Although, if the Gothitelle user knows that Arceus-Fairy is running Roar, they can prevent being phazed by repeatedly using Taunt and Rest. Thunder on the Calm Mind set gives Arceus-Fairy an option to hit Celesteela, Ho-Oh and Skarmory somewhat efficiently. It should only really be considered if Ho-Oh is unable to be dealt with effectively by another teammate. Will-O-Wisp is an option on the Calm Mind set to weaken incoming Necrozma-DM and Arceus-Poison, but its often not as useful as the relevant attacks to hit either. Iron Defense on the Calm Mind set allows Arceus-Fairy to set up against many offensive builds, albeit it is virtually useless if the opposing team has a Marshadow still remaining. Refresh is a mediocre option on both sets, but does still serve a relevant purpose. It is however, often not worth sacrificing another moveslot for it. Arceus-Fairy can also run maximum Special Attack on Calm Mind sets but this is rarely ever worth it.
Checks and Counters
**Shadow Tag**: Gothitelle and Mega Gengar both easily remove Arceus-Fairy without much to fear in return. Offensive Mega Gengar sets may be unable to eliminate Earth Power variants of Arceus-Fairy if it has already used Calm Mind once.
**Steel-types**: Arceus-Fairy is unable to deal with any Necrozma-DM sets effectively; however, its power can be sufficiently weakened by Will-O-Wisp. Even while burned, Necrozma-DM checks Arceus-Fairy quite reliably. Prism Armor makes all of Arceus-Fairy's coverage attacks relatively weak and unable to deal sufficient damage. Other more defensive Steel-types like Celesteela, Ferrothorn, Skarmory and Magearna can all deal with defensive variants of Arceus-Fairy without much hassle; although offensive variants of Arceus-Fairy can overwhelm the former three.
**Ho-Oh**: Ho-Oh can easily switch into all of Arceus-Fairy's attacks, while shrugging off Toxic due to its ability Regenerator. Arceus-Fairy can stall out Ho-Oh with Toxic and require it to switch out if Arceus-Fairy is unable to be badly poisoned due to an alternate status ailment.
**Primal Groudon**: Primal Groudon can switch into any of Arceus-Fairy's attacks reliably except Earth Power. Due to this, Primal Groudon can find many ways to take advantage of Arceus-Fairy, such as using Swords Dance, setting up Stealth Rock or firing off a powerful attack. Primal Groudon should still be weary of residual damage from moves like Toxic though.
**Arceus-Poison**: Arceus-Poison handles support variants of Arceus-Fairy extremely well without any concerns; however, some defensive Arceus-Poison sets may struggle against Calm Mind Earth Power Arceus-Fairy.
**Specially-defensive Walls**: Blissey and Chansey are both able to reliably stall Arceus-Fairy with Toxic in conjunction with Confide and Soft-Boiled. Clefable is unable to be 3HKOd due to Unaware and Leftovers, and can easily deal with Arceus-Fairy as a result.