Overview
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Several factors collectively establish Palkia among the highest ranks of the Ubers roster. Firstly, a 4x resistance to Water-type moves gives Palkia an unrivalled role as a Kyogre check. Neutrality to most types and only two weaknesses to Dragon- and Fairy-types is a nice plus for it. Secondly, a good base 100 Speed lets Palkia outpace the numerous base 90-99 Speed Pokemon that populate the tier. Lastly, Palkia's great base 150 Special Attack complemented by quality STAB moves and the necessary coverage moves confer huge offensive prowess ton it. As far as support goes, Palkia has a usable movepool comprising status, phazing, and Rest. This, in tandem with a good base 120 Special Defense, allow it to use a defensive set to good effect. Unfortunately, the newly introduced Fairy-types are the bane of Palkia's existence, with a key offensive threat in Geomancy Xerneas being able to use it as setup fodder. Offensive powerhouses like Mega Blaziken and Mega Mewtwo X are other newcomers that can overwhelm Palkia with their superior sSpeed and sheer damage output. Additionally, weathe generation shift saw ther Abilities no loss ofnger cause permanent weather, and all of Palkia’s commonly used attacking options bar Spacial Rend had their base power nerfed. All in all, though, Palkia’s blend of typing, speed, and power makes it one of the most defining Pokemon in Ubers with few, if any, real flaws.
Standard
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name: Standard
move 1: Rest
move 2: Toxic
move 3: Hydro Pump / Surf
move 4: Spacial Rend
ability: Pressure
item: Leftovers
evs: 4 HP / 252 SpA / 252 Spe
nature: Timid
Moves
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Rest, being Palkia’s only means of recovery, grants it more longevity, especially against Kyogre and support Arceus formes; it works particularly well in tandem with cleric support and Leftovers recovery. This move is very important on Palkia as it goes a long way in letting it stand up to the aforementioned Pokemon throughout the course of the match. Toxic is Palkia’s means of wearing down bulky opponents such as Lugia; the cumulative nature of Toxic damage will overwhelm these Pokemon if they lack a means of status removal. In conjunction with Rest, this allows Palkia to beat most support Arceus formes one-on-one. Hydro Pump is a powerful STAB move that hits most opponents neutrally for respectable damage and can function as a nuke of sorts under rain. If its PP and accuracy are problematic, Surf is a weaker, more accurate option, but the power drop is quite significant, especially if you choose to invest in Palkia’s Special Attack. Spacial Rend complements Hydro Pump excellently, with Ferrothorn being the only commonly seen Pokemon in Ubers that resists both moves. Dragon-types such as Giratina formes and opposing Palkia that resist Palkia’s Water-type STAB moves are conveniently hit super effectively. Alternatively, Fire Blast can be used in this slot to take down problematic Steel-types, mainly Ferrothorn and Scizor. Thunder Wave is a third possible option, giving Palkia access to a second status move that is situationally more useful than Toxic. For example, Thunder Wave can cripple Geomancy Xerneas that attempt to get ahead of themselves and set up on Palkia.
Set Details
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252 Speed EVs with a Timid nature makes the best of Palkia’s base 100 Speed, which gives it a very valuable niche. With maximum investment, Palkia can outrun and pick off positive-natured base 90 Speed Pokemon; it also handily outspeeds the newly introduced Xerneas and Yveltal. The remaining EVs can be invested in one of two stats. Using 252 Special Attack EVs maximises the power of Palkia’s moves, allowing it to secure KOs on Pokemon like Giratina-O and Ho-Oh with its STAB moves and hitting foes much harder in general. Alternatively, the EVs can be invested in HP, letting Palkia stomach Judgment from support Arceus formes and survive its Rest turns more comfortably, albeit at the cost of increased damage output. Leftovers is really the only viable item choice on this Palkia set, as it gives Palkia more wiggle room in switching in and taking hits. For example, Judgment from a type-neutral 0 SpA support Arceus is guaranteed a 3HKO on 252 HP / 0 SpD Palkia, but only has a 19% chance to do so factoring in Leftovers recovery. Leftovers is also effective in tiding Palkia through its Rest turns.
Usage Tips
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Switch Palkia in on Kyogre, especially early-to-mid-game, in order to scout its set and minimise damage done to the team. It is likely to be the only Pokemon on your team that is 4x resistant to Water-type moves, so make full use of that. Don’t get overcocksurenfident with predictions untill late-game, when you might thenthen might want to capitalise on predicted Thunders/ or Ice Beams from Choice Specs/Choice Scarf Kyogre by switching into other teammates who can take the hit better. That being said, do not rashly switch Palkia in on Pokemon with relatively powerful unboosted STAB moves, especially if you see Kyogre in Team Preview; you don’t want it to be unable to check Kyogre when it needs to. For example, it is a bad idea switching Palkia into Landorus-T’s Earthquake, even if you can force it out afterwards, because Palkia will now be in possible KO range of Kyogre’s Thunder and will be forced to use Rest.
Speaking of Rest, Palkia finds itself in a precarious situation while asleep. As it lacks Sleep Talk, this set is next to useless while asleep and is not especially bulky, so minimise unnecessary damage/ or status inflicted on Palkia such that it does not have to incapacitate itself by using Rest. The move should only ever be used as a means of status removal and shrugging off damage incurred from switching in on Kyogre, in order to let it continue to do just that. As a final caveat regarding Rest, keep in mind that Pressure, in conjunction with Rest, allows Palkia to outstall specially defensive Kyogre, so if you see one on the opposing team, your usage of the move should be targeted at ultimately outlasting it. Lastly, similiar to how it checks Kyogre, this Palkia can put type-neutral support Arceus formes on a timer by using Toxic in conjuction with Rest. Note that it cannot switch into Judgment comfortably unless it is running 252 HP EVs, so keep that in mind when contemplating switching it in.
Team Options
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This Palkia is a very self-sufficient Pokemon, supporting one’s team more than it requires support. Still, certain Pokemon are necessary teammates to have, and others are useful partners. Firstly, include teammates to deal with Fairy-types. Steel-types like Scizor and Heatran are good choices, as is Ho-Oh. Cleric support is also much appreciated, worksynergizing brilliantly with Rest. Sylveon and Xerneas are reliable clerics that can also handle opposing Palkia. A Ground-type to handle Choice Scarf Zekrom is nice, as it is very dangerous as a revenge killer. Groudon is a good option, as is Landorus-T/Gliscor. These Pokemon can also set up Stealth Rock, which is an important entry hazard to have active and which can check threatening Pokemon like Ho-Oh. ((Mention how this helps Palkia specifically, such as specific KOs it attains with SR support.)) It is good to note that a Ground-type, along with the Fairy-type clerics mentioned before, puts Zekrom users in an unsavory situation where they have to predict accurately with Zekrom’s STAB moves or risk wasting a turn. Moving on, iIt is also nice to have a teammate to take advantage of Blissey, a hard counter to Palkia. Ho-Oh can do this, as docan powerful physical attackers like Mega Mewtwo X. Regarding Mewtwo, having good switch-ins to it and its Mega Evolutions are required, as they threaten Palkia greatly with their superior speed and powerful STAB moves. Fairy Arceus and Xerneas can deal with Mega Mewtwo X, while Yveltal and Giratina-O handle Mega Mewtwo Y and Life Orb Mewtwo. Lastly, it is recommended to have an Arceus form of your own to deal with opposing Palkia; Fairy and Ghost Arceus are good for this purpose, and also help with Mewtwo. Mega Gengar deserves a mention as a blanket check to a fair few Pokemon that plague Palkia, namely Fairies, Extreme Killer Arceus, and Blissey not carrying Shed Shell.
Offensive
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name: Offensive
move 1: Hydro Pump
move 2: Spacial Rend
move 3: Fire Blast
move 4: Dragon Tail / Thunder / Thunder Wave
ability: Pressure
item: Lustrous Orb / Leftovers
evs: 4 HP / 252 SpA / 252 Spe
nature: Timid
Moves
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Hydro Pump is a strong STAB move; boosted by Lustrous Orb and coming off base 150 Special Attack, it hits even neutral targets considerably hard; rain causkyrockets its damage output to skyrocket. Spacial Rend is Palkia’s choice of a Dragon-type STAB move, complementing Hydro Pump in providing excellent neutral coverage. It is a consistent, fairly powerful, and can be used under any weather, and also hits opposing Palkia, Giratina, and Rayquaza super effectively. Fire Blast is mandatory coverage against the numerous Steel-types in Ubers, notably Ferrothorn, which resists both of Palkia’s STAB moves. Dragon Tail phazes switch-ins to Palkia such as Blissey and support Arceus formes, racking up chip damage on these Pokemon. It is also very useful for temporarily preventing set up from Calm Mind Arceus formes and Extreme Killer Arceus, Pokemon which this Palkia set is very vulnerable to due to its inability to boost its stats and relative frailty. Note that Dragon Tail is unable to phaze Fairy-type setup sweepers, notably Geomancy Xerneas and Fairy Arceus. Thunder can be used in this slot to hit Kyogre, Water Arceus, and Lugia super effectively. While its 30% chance of paralysis should not be counted on, it is high enough to be significant. Thunder Wave is an excellent third option for crippling Arceus switch-ins and overeager Geomancy Xerneas/Calm Mind Arceus formes. Surf can be used if Hydro Pump’s accuracy is a problem, but the power drop is significant. Draco Meteor can be used over Spacial Rend as a stronger Dragon-type move that notably ensures a KO on opposing Assault Vest Palkia, has a 75% chance to KO 0 HP Groudon outright after it has taken Stealth Rock damage, and proves situationally more useful against Arceus switch-ins. However, the Special Attack drop can be taken advantage of by opportunistic setup sweepers, making the consistency of Spacial Rend generally more appreciated.
Set Details
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Maximum Speed and Special Attack investment with a Timid nature makes the best of Palkia’s good Speed tier and lets it hit as hard as possible. Lustrous Orb gives Palkia’s STAB moves a much-welcomed 1.2x power boost with no drawbacks. Leftovers can also be used to give Palkia more wiggle room in switching in and increasing its longevity somewhat. Haban Berry is an interesting option to consider, allowing Palkia a sure fire means of beating opposing Palkia one-on-one. Note that Dragon-type attacks are much less prominent this generation, reducing Haban Berry's utility and making it largely a sub-optimal item choice.
Usage Tips
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Make full use of Palkia’s 4x resistance to Water-type moves by switching it into Kyogre, especially early-to-mid-game. Don’t get cocksureoverconfident with predictions until late-game, where you might then want to capitalise on predicted Thunders/ and Ice Beams by switching into other teammates. Note that unlike other Palkia sets, offensive Palkia has no means of recovery and will get worn down quickly, hence it is advised to actively predict the opponent’s switches and double switch into Palkia, so as to preserve its limited health. Also, do not be rash in switching Palkia into Pokemon with moderately powerful unboosted STAB moves, or those that can cripple it with status, especially if you see Kyogre in Team Preview. While it is on the field, Palkia’s STAB Hydro Pump is a very abusable move; spam it when Palkia can force the opposing Pokemon out, especially if the opponent’s Arceus forme is unrevealed and they does not have an obvious Palkia check like Blissey or Sylveon. This is a good way to get the opponent to reveal his Arceus forme early-game as few other Pokemon are really able to stomach offensive Palkia’s assaults. Using Thunder Wave to catch these Arceus on the switch is also a good idea. Lastly, note that Palkia’s moves are quite weather-dependent. Hydro Pump and Thunder function optimally under rain, while Fire Blast can be used in any weather but. Try to manipulate the weather to your advantage with Palkia’s teammates for optimum effectiveness of its moves. Spacial Rend is a consistent and powerful move that you can sling around under any weather.
Team Options
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As with standard Palkia, offensive Palkia is very self-sufficient, but some teammates are necessary to have, while it appreciates the presence of others. Firstly, teammates to deal with Fairy-types are a must. Steel-types like Scizor and Klefki can do this, these two in particular also fit with the more offensive motif of teams one would like to use this Palkia on. Next, Ground-types are useful to deal with Scarf Zekrom. Groudon is a good teammate, as is Landorus-T/ or Gliscor. These Pokemon also have access to Stealth Rock, which checks dangerous Pokemon like Ho-Oh and racks up residual damage on switch-ins, which is very nice considering Palkia's ability to force switches. Kyogre is another good teammate as its Drizzle gives Hydro Pump a large 1.5x power boost and makes Thunder 100% accuratecy. Spamming Water-type moves is a pretty effective way of softening up teams and is a strategy in itself, hence having two users of powerful Water-type moves is a good way to go. Having a support Arceus forme is good to deal with opposing Palkia. Fairy and Ghost Arceus are solid candidates for the role as they also help with Mewtwo, another potent offensive threat. Mega Gengar can remove Fairies, support Arceus formes, Extreme Killer Arceus, and Blissey not carrying Shed Shell, facilitating a Palkia cleanup. It is important to note that given this Palkia's relative frailty and lack of recovery, your other team members should be able to pressure Kyogre decently well, such that it does not get to switch in too freely. You should also be able to ensure that common Calm Mind Arceus such as Electric, Ghost and Fairy Arceus do not get out of hand and accrue too many Calm Mind boosts.
Specially Defensive
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name: Specially Defensive
move 1: Surf
move 2: Toxic
move 3: Rest
move 4: Sleep Talk
ability: Pressure
item: Leftovers
evs: 248 HP / 8 Def / 252 SpD
nature: Calm
Moves
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Surf is this set's most consistent mono-attacking option, hitting most Pokemon neutrally and possessing 100% accuracy as well as high PP, unlike most of Palkia's other moves. Super effecive coverage on Ground-types, Ho-Oh, and Heatran is a nice plus. Toxic, especially coupled with Rest, allows Palkia to pressure and win one-on-one vs many common support Arceus formes such as Ghost, Water, and Rock Arceus. Rest gives Palkia the longevity it needs; it is a necessity on this set, which prioritises staying power over offensive presence. Sleep Talk allows Palkia to spread Toxic even while asleep and basically prevents it from being completely helpless during its Rest turns. Spacial Rend or Fire Blast can be used in the last slot 4; notably, the former lets Palkia hit Giratina formes hard and the latter, Steel-types like Ferrothorn and Scizor. Dragon Tail can also be used in this slot, to ensure Calm Mind Arceus that have already accrued boosts when Palkia switches in do not overwhelm it, especially if Palkia has already taken prior damage. Dragon Tail can also stave off Extreme Killer Arceus in the interim.
Set Details
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252 EVs are invested in both HP and Special Defense to maximise Palkia's special bulk; this works well with Palkia's good base 120 Special Defense and neutrality to most types. To illustrate Palkia's impressive bulk, this set takes a maximum of 29% from Choice Scarf Kyogre's Thunder, while Judgment from a type-neutral 0 Special Attack support Arceus does a maximum of 30%. Leftovers is a mandatory item to prolong Palkia's lifespan and let it survive its Rest turns.
Usage Tips
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This Palkia is a prime check to Kyogre and should be switched in aggressively against it. With its EV spread, Toxic, and Rest, this Palkia now fares well against most common support Arceus barring Fairy Arceus and Poison Arceus, so switch it in against these as well. As mentioned, Judgment from a type-neutral 0 SpA Arceus does a maximum of 30%, meaning this Palkia can switch in far more comfortably against support Arceus than any other Palkia set. Aside from this, though, try not to let Palkia sustain any unecessary damage, as Rest isn't exactly reliable recovery and Palkia should be as healthy as possible to tackle the listed threats, of which checks to are in short supply. Letting it get hit by Earthquake/Psystrike/Brave Bird unecessarily will leave it too crippled to perform its role effectively later in the game.
Team Options
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Hazard support should be employed to make the best of this set's ability to deal with common Defogging support Arceus. Stealth Rock also checks Ho-Oh, which otherwise threatens this set greatly. Ground-types such as Landorus-T are good setters that can handle Zekrom as well. Next, teammates to deal with Fairy-types are required. Heatran and Scizor fill this role, as can Ho-Oh and Mega Gengar. Cleric support is much appreciated. You will find that Fairy-types are friend as much as foe: Sylveon and Xerneas are reliable clerics that can also handle opposing Palkia and wall Dragon-type attacks this set is vulnerable to. Moving on, iIt is also necessary to have a good switch -in to Mewtwo and its Mega Evolutions as they threaten Palkia massively with their superior speed and powerful attacks. As with other sets, Fairy Arceus and Xerneas deal with Mega Mewtwo X, while Yveltal and Giratina-O handle Mega Mewtwo Y and Life Orb Mewtwo. Again, it is advised to have an Arceus form of your own to take on opposing Palkia; Fairy and Ghost Arceus are solid choices that also put in work against Mewtwo. Finally, checks to strong physical attackers/sweepers are required. The aforementioned Landorus-T can check Ho-Oh and Swords Dance Ground Arceus; Ghost Arceus/Giratina-O can handle Extreme Killer Arceus and Mega Mewtwo X; physically defensive Ho-Oh helps with Blaziken and opposing Ho-Oh.
Choice Specs
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name: Choice Specs
move 1: Hydro Pump
move 2: Draco Meteor
move 3: Spacial Rend
move 4: Fire Blast / Thunder
ability: Pressure
item: Choice Specs
evs: 4 HP / 252 SpA / 252 Spe
nature: Timid
Moves
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Hydro Pump hits very hard with Choice Specs equipped, doing 57%-68% to 252 HP Arceus, and severely damaging most other neutral targets. Draco Meteor backed by Choice Specs packs nuclear power, but note that the Special Attack drop can be capitalised on, though Choice Specs Palkia is by and large a hit-and-run Pokemon anyway. Spacial Rend is a weaker but far more consistent Dragon-type STAB move and has certain important functions on this set, such as pressuring type-neutral Arceus switch-ins very effectively. Once any opposing Fairy-types have been taken care of, Spacial Rend is also an awesome move for Palkia to clean with late-game. Fire Blast handles Steel-types, notably Ferrothorn. It also allows Palkia a sure fire means to get past Grass Arceus under neutral or sunny weather, and is Palkia's best attacking option in sun. Thunder can also be used in this slot, hitting Kyogre, Water Arceus, and Lugia. The power boost from Choice Specs allows Thunder to damage these Pokemon severely, such that they cannot stall Palkia out by healing off the damage.
Set Details
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252 EVs are invested in both Speed and Special Attack to let Palkia hit as hard and fast as possible. This EV spread is quite straightforward and non-negotiable. Choice Specs is the point of the set, allowing Palkia to pressure/b or defeat some of its would-be checks in support Arceus formes and bulky Fairy-type switch-ins.
Usage Tips
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Spam Hydro Pump most of the time as it 2HKOes practically all neutral targets barring Blissey and will punish type-neutral Arceus formes that attempt to switch in. Try having rain activeRain is recommended when doutilizing this strategy; the power boost is very significant. In sunny weather, Fire Blast replaces Hydro Pump in being your best bet at damaging stuff in general, and once Fairy-types are out of the picture, Spacial Rend is your go-to move to spam. Note that it is important to ensure Fairy-types are no longer an issue before using Spacial Rend loosely, as a simple switch into one of them can reverse your momentum. Having hazards up is also a great way to further pressure switch-ins and soften up the opposing team for a cleanup by another teammate or Palkia itself. Try as much as possible to beringing Palkia in via double switches or as a revenge killer; like offensive Palkia, this Palkia is quite frail with no means of recovery, and its main aim is still checking Kyogre on teams that use it. You should also try as fhard as possible to steer clear of status, which is also very debilitating for this set; paralysis destroys its sSpeed advantage and burn/poison wears away at it down. Lastly, be mindful of your moves' remaining PP throughout the match, as being locked into and spamming a move drains PP rapidly, not to mention that the ubiquity of Pressure in Ubers exacerbates this issue.
Team Options
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If anything, a solid answer to Fairies is more necessary than ever here due to this set's inability to switch moves. As with the offensive set, Scizor and Klefki are good examples of such teammates. Mega Gengar is another great teammate in this regard. Again, Ground-types are useful to deal with Scarf Zekrom. Groudon and Landorus-T are good teammates that also have access to Stealth Rock, which checks dangerous Pokemon like Ho-Oh and racks up residual damage on switch-ins, which is very nice considering Palkia's ability to force switches. Kyogre is nice to have as well, as its Drizzle gives Hydro Pump a large 1.5x power boost and makes Thunder 100% accurate. Spamming Water-type moves is a pretty effective way of softening up teams and a strategy in itself, hence having two users of powerful Water-type moves is a good way to go. Moving on, aA support Arceus forme is good to deal with opposing Palkia. Fairy and Ghost Arceus are solid candidates for the role as they also help with Mewtwo. Checks to physically- based revenge killers and Extreme Killer Arceus are required; the aforementioned Ghost Arceus/Giratina-O can handle Mega Mewtwo X, Blaziken, and Extreme Killer Arceus. Finally, it is important to ensure that common Calm Mind Arceus such as Electric, Ghost and Fairy Arceus do not get out of hand and accrue too many Calm Mind boosts.
Other Options
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A Choice Scarf set with the same moveset as the Choice Specs set can be run. This set has lost much of its appeal this generation; this is mainly attributed to the opportunity cost of not using one of the other sets. The presence of Fairies severely impairs the effectiveness of spamming Scarf Dragon-type moves. As a revenge killer, it faces tough competition from Scarf Kyogre and Zekrom, as well as new options in Scarf Xerneas and Yveltal. It still retains a niche due to its elevated speed tier and can act as a glue of sorts due to its typing and speed, as well as being a good measure against Sticky Web teams, but is overall a lackluster set that generally accomplishes little relative to Palkia's other sets. Secondly, Assault Vest can be used on the offensive set. This allows Palkia to weather special attacks especially from the likes of Kyogre much more comfortably, but the inability to use non-damaging moves must be taken into account. Notably, this leaves Palkia very susceptible to Geomancy Xerneas. More importantly, the inability to use Rest or Toxic means Palkia loses a very important niche in checking support Arceus formes, which are very prevalent in the tier this generation. Thirdly, an offensive Trick Room set can be used with a Quiet nature. This allows Palkia to outspeed anything above 184 Speed under Trick Room; this works nicely with its great coverage and high Special Attack. However, this is somewhat counterproductive given Palkia's good speed tier. This set should really only be used if one's team has multiple members that benefit from Trick Room. Focus Punch can be fit on slot 4 of the offensive set to deal with Blissey, but this is extremely situational and should only be considered if one's team has huge problems with the pink blob. Chesto Berry can be used to let Palkia pull off a free Rest, but its one-off nature is generally inferior to the long-term reliability Leftovers provides. Finally, Roseli Berry on offensive Palkia can let it stomach an unboosted Judgment or Moonblast in a pinch, but is not very useful as Palkia finds itself unable to beat healthy Fairy-types anyway.
Checks & Counters
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**Fairy-types**: These are a pain for Palkia to get around as they are immune to its Dragon-type STAB moves. Fairy Arceus, with its superior speed and good natural bulk, takes 46%-54% from a Lustrous Orb Hydro Pump in neutral weather, meaning it can switch into one comfortably enough and proceed to force Palkia out with the threat of a super effective Judgment. Note though, that if it does not use Recover, it will be hard-pressed to switch into Palkia again. Xerneas does not like switching into Palkia, but one-on-one, it can KO Palkia with STAB Moonblast or set up a Geomancy on it. Bulkier Fairy-types like Sylveon and Clefable can stall Palkia out of Hydro Pump PP with Wish and Protect, and proceed to overwhelm it with their STAB moves. These Pokemon also often carry Heal Bell, with which they can cure themselves and their teammates from Palkia's Toxic.
**Blissey**: The pink blob is a prime counter to offensive variants of Palkia. With its gargantuan Special Defense, reliable recovery in Softboiled/ or Wish, access touse of Toxic, and Heal Bell/Natural Cure to remove status, Blissey is guaranteed to beat offensive Palkia in a one-on-one situation and can switch in on all variants quite handily. Unfortunately, Palkia using Rest can outstall Blissey in a one-on-one situation, factoring in Pressure.
**Type-Neutral Arceus Formes**: Arceus formes that take neutral damage from Palkia's attacks can check it, provided it is not raining. These consist of Electric, Ghost, Fighting, Poison, Dark, and Psychic Arceus. They can all switch into any of Palkia's moves and overcome it with Recover and Judgment. Electric and Ghost Arceus are commonly seen using Calm Mind sets; these are more threatening as they can set up Calm Mind on Palkia if it chooses to stay in. However, note that most Arceus formes are vulnerable to status, and while they can generally overcome offensive Palkia, they will fall to specially defensive Palkia one-on-one. Extreme Killer Arceus can set up a Swords Dance on all Palkia and threaten a sweep afterward.
**Mewtwo**: STAB Psystrike from Mewtwo or Mega Mewtwo Y targets Palkia's weaker Defense stat and will cleanly 2HKO it, or even KO outright if Palkia has taken minimal prior damage (252 Special Attack Psystrike from Mega Mewtwo Y with a Timid nature does 70%-81% to offensive Palkia). STAB Low Kick from Mega Mewtwo X is even more damaging, doing a minimum of 81% to offensive Palkia. While none of them can switch into Palkia's STAB moves comfortably, they can all do so in a pinch. Mega Mewtwo Y, being the most specially bulky, is not 2HKOed by Hydro Pump from 0 Special Attack Palkia and has the easiest time switching in. Regardless, all of them are especially deadly as revenge killers.
**Dialga**: The only Dragon-type that takes neutral damage from opposing Dragon-type moves, specially defensive Dialga can take 2 Spacial Rends and KO back with Draco Meteor. Other variants of Dialga can live a Spacial Rend comfortably and KO back as well.
**Shadow Tag**: Mega Gengar can trap Palkia and force a double KO with Destiny Bond; this is especially detrimental for the Palkia user as they loses his their Kyogre check, hence Mega Gengar deserves mention as something Palkia must look out for as it can be extremely threatening especially if paired with Pokemon like Kyogre. Gothitelle, albeit rare, can trap and set up on specially defensive Palkia. Wobbuffet can trap and KO offensive Palkia with Mirror Coat, or Encore specially defensive Palkia into a support move that can then be taken advantage of.
**Revenge Killing**: Choice Scarf Zekrom and Choice Scarf Xerneas stand out among these, as they are relatively commonly seen and can 1OHKO Palkia with their STAB moves. Mega Blaziken with Protect is also very dangerous. Other lesser-seen Choice Scarf users like Dialga and Yveltal are threatening as well. Mega Kangaskhan can use a combination of Fake Out and Sucker Punch to take 77%-91% off 0 HP / 0 Def Palkia before it can react, while slower Palkia variants are KOed by Fake Out + Return even with 252 HP EVs invested. Life Orb Yveltal can take 59%-69% off offensive Pakia with a Life Orb, Dark Aura-boosted Sucker Punch, so be watchful of that as well.
The following checks are inconsistent as they are quite weather-dependent:
**Water Arceus**: Water Arceus checks Palkia reliably only in sunny weather, as Thunder from offensive Palkia can 2HKO it (although it can just barely avoid this with investment in Special Defense), and its 30% paralysis chance is too high to be ignored. Also, Palkia is 4x resistant to its STAB Judgment. Calm Mind Water Arceus with Refresh is much more dangerous, as it can accrue multiple boosts while shrugging off damage and status with Recover and Refresh, eventually overwhelming Palkia. It can also set up on specially defensive Palkia, unlike most other Arceus formes.
**Lugia**: Barely avoiding the 2HKO from Thunder, Lugia theoretically checks Palkia in neutral and sunny weather, with a combination of Toxic, Roost, and Thunder's poor accuracy. However, Thunder's 30% Paralysis rate, coupled with the fact it is inadvisable for Lugia to be EVed to outspeed offensive Palkia, mean it is a shaky check at best and should only ever be counted on under sun.
**Grass Arceus**: Grass Arceus can check offensive Palkia only in rainy weather, and can beat it one-on-one in neutral weather. Specially defensive Palkia will come out on top of it, though.
**Ferrothorn** The steel durian is only able to check Palkia with a combination of Leech Seed and Protect if it is raining; Fire Blast being 4x effective on it prevents it from doing so in any other weather, although it is worth noting that Palkia only always carries Fire Blast on offensive sets.