What is the highest stat possible?

Let’s say that I have a Shuckle with 252 Def EVs, Bold Nature, and Defense Curl. It can go up pretty high. What is the highest stat any Pokemon can have? And who is that Pokemon? Take items, EVs, natures, and moves into account.

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If you include HP which is slightly different to the other stats, the highest isBlissey’s HPwhich can get to714.

Otherwise it’sShucklewho can have a maximum Defense or Special Defense of614.

I know that this answer is extremely late, but there are some newer ways to get the highest stats possible in Pokemon. All of these have been tested usingPokemon Showdown. Additionally, the special defense and speed methods were available to you during the time of the post, so the other answer is incorrect.

Disclaimer:I will say “a move that doesn’t affect” a certain Pokemon multiple times throughout this answer. This just means that the move does not affect that Pokemon’s stats or HP. You may use many moves that boost your stats such as Swords Dance or Calm Mind. This move may also be Protect (In some cases) and Substitute (In some cases).

Highest HP Possible:A level 100 Blissey with at least 252 EVs and 31 IVs in HP, giving it a total of714HP

Highest Attack Possible and Highest Stat Possible:

Requirements:1. A level 100 Shuckle with at least 252 EVs and 31 IVs in defense, with a defense boosting nature2. Shuckle must know Power Trick and Shell Smash and cannot have Contrary3. A Bunnelby or Diggersby with Huge Power and U-turn4. Other team must have a Pokemon with Skill Swap that is faster than Bunnelby or Diggersby and knows 1 move that doesn’t affect Shuckle5. Other team must have another Pokemon with Trick and must hold a Choice Band

Achieve By:1. Sending out Bunnelby or Diggersby and the other team must send out the Pokemon with Skill Swap2. Other Pokemon uses Skill Swap while Bunnelby or Diggersby uses U-turn and sends out Shuckle3. Other Pokemon uses Skill Swap again while Shuckle uses Power Trick4. Other Pokemon uses the move that doesn’t affect Shuckle (Not Trick) while Shuckle uses Shell Smash5. Other Pokemon switches into the Pokemon that knows Trick while Shuckle uses Shell Smash6. Other Pokemon that knows Trick uses Trick while Shuckle uses Shell Smash to give Shuckle the Choice Band7. Shuckle now has7,368attack (and can use an attack next turn for a VERY gimmicky sweep)

Highest Defense Possible:

Requirements:1. A level 100 Shuckle with at least 252 EVs and 31 IVs in defense, with a defense boosting nature2. Shuckle cannot have Contrary3. Shuckle must have Defense Curl or Withdraw4. Other team must have Alolan Persian with Fur Coat, Assist, and 1 move that doesn’t affect Shuckle5. Other team must have only 1 other Pokemon and it can only know Entrainment or Skill Swap

Achieve By:1. Sending out Shuckle and Alolan Persian2. Alolan Persian uses Assist, which can only be turned into Entrainment or Skill Swap to give Shuckle Fur Coat ability while Shuckle uses Defense Curl or Withdraw3. Alolan Persian uses the other move that doesn’t affect Shuckle while Shuckle uses Defense Curl or Withdraw4. Repeat step 3 four more times5. Shuckle now has4912defense

Highest Special Attack Possible:

Requirements:1. A level 100 Ditto with the ability Imposter2. A level 100 Mega Mewtwo Y with at least 252 EVs and 31 IVs in special attack, with a special attack boosting nature3. Mega Mewtwo Y must know Calm Mind4. Ditto must hold a Choice Specs

Achieve By:1. Sending out Ditto and Mega Mewtwo Y on opposite teams, (If it is a double battle, Mega Mewtwo Y must be directly across the field from Ditto) so that Ditto transforms into Mega Mewtwo Y2. Ditto uses Calm Mind3. Repest step 2 five more times4. Ditto now has3,210special attack

Highest Special Defense Possible:

Requirements:1. A level 100 Shuckle with at least 252 EVs and 31 IVs in special defense, with a special defense boosting nature2. Shuckle must know at least 1 move that is an attacking move and must have Contrary3. Shuckle must hold an Assault Vest4. Another Pokemon on the opposing team that knows Metal Sound

Achieve By:1. Sending out Shuckle and the Pokemon that knows Metal Sound and is on the opposing team2. Pokemon that knows Metal Sound uses Metal Sound3. Repeat step 2 twice4. Shuckle now has3,684special defense

Highest Speed Possible:

Requirements:1. A level 100 Deoxys Speed with at least 252 EVs and 31 IVs in speed, with a speed boosting nature2. Deoxys Speed must know Fling and Agility and hold an item that can be flung using Fling3. A Drifblim or a Drifloon with Unburden and Skill Swap and 1 other move that doesn’t affect Deoxys Speed

I hope that this information is helpful or feeds your curiosity.

If we’re going to take items and stat boosts into account, let’s actually take them fully into account, under current rules and mechanics.

Max HP is of course 714, and nothing messes with that so there’s no way to improve on the established result there.

For Attack, we can do something different. While it will involve a Shuckle with maxed out Defense and Power Trick, Shuckle isn’t the one who will be getting the maximum Attack stat. Instead, after using Power Trick, Shuckle will use another move–PowerSplit–to split its attack with a Pikachu. Meanwhile, since this is a pretty time-consuming process, Pikachu can use some high-PP move like Agility purely to waste time.

If Shuckle started with 614 Defense, which was later moved to Attack, and Pikachu can only go as high as 229, then after the split they both have a raw attack stat of 421. At this point Shuckle will have to switch out and back in, which returns it to its normal status of 614 Defense and some low number in Attack, but now it can Power Trick and Power Split again. Each time through, Pikachu’s attack stat will be raised, to 517, then 565, and finally after nine loops of that, Pikachu will have a raw attack stat of 613–one point below Shuckle’s own starting maximum Defense. It’s not possible to do any more productive Power Splits, because splitting 613 with 614 just rounds down to 613 again.

The reason for using Pikachu here, even at the cost of that inefficient Power Split technique that costs one point on the initial stat, is that Pikachu alone is capable of using the Light Ball, which uses the item slot to provide a 100% boost. (Cubone or Marowak would also work with the Thick Club, but all other species are limited to a 50% boost out of this slot, by using Choice Band.) So once we have the stat at 613 plus Light Ball, it’s trivial to get to +6 Attack somehow, and then Skill Swapping to Huge Power or Pure Power is just a matter of having the right Pokemon on board to do that. But there’s one final adjustment that affects the attack stat: after all this is done, have Pikachu’s partner switch out to Cherrim, and use Sunny Day. This turns on the Flower Gift ability, which provides a 50% boost to the physical Attack and special Defense stats of both Cherrimand its teammate. All told, these boosts give Pikachu anAttack stat of 14,712.

Of course, part of “current rules” is that triple battles no longer exist; if you go back to an earlier rule version (such as ORAS) in which they did, you could easily throw in a second Cherrim, and all the other moves in the setup still work as described, boosting the Attack to22,068.

Maximizing Defense requires a greater sense of urgency. The only item for giving 100% Defense is Metal Powder, and that only works on Ditto, and only if the Ditto has not transformed yet. Since Ditto is completely incapable of learning other moves to waste time, you have to have ways of both making sure Transform always fails, and doesn’t run out of PP before Ditto KO’s itself with Struggle.

It’s not especially hard to make Transform fail; the two easiest ways of doing so are by having it attempt to transform into a Pokemon that’s actually Zoroark in disguise, or having the other Pokemon put up a Substitute before it can transform. To facilitate the setup here, I’d go with the Substitute method…specifically, Substitute on a Smeargle, along with Skill Swap, Cotton Guard, and Guard Swap.

While Smeargle and Ditto occupy one side of the field, the other side can consist of four Shuckles that switch back and forth between each other. Predictably, these Shuckles would all come with max defense, but they won’t need to use Power Trick in order to move that into an attacking number; instead they can use Guard Split with the Ditto and immediately switch next turn to one of the other Shuckles. As with Power Splitting Pikachu, it takes nine Guard Splits to raise Ditto to the maximum possible starting number of 613, and with two slots working in harmony, they can combine to get all nine of them down by the 9th turn of the battle. Smeargle can continue to use moves like Substitute to waste time, and should also use Cotton Guard at least twice.

Once the Shuckles are done with their Guard Split rotation, one of their slots can be replaced by a Furfrou or Alola Persian, which Smeargle immediately Skill Swaps to get hold of the Fur Coat ability, and another Skill Swap next turn gives that ability to Ditto. Smeargle’s final move is Guard Swap; note that this is not the same as Guard Split. Guard Split operates on the numbers at the raw stat level, while Guard Swap applies to common boosts. After using Cotton Guard twice, Smeargle will be at +6 Defense, and then Guard Swap will give that boost over to Ditto despite it being a blob that doesn’t have any boosting moves of its own. Between that, the 613, the Fur Coat, and the Metal Powder, Ditto now has aDefense stat of 9808, and even a few turns of Transform PP left with which to enjoy it!

Special Defense gives us the Deep Sea Scale as the only 100% item, and that works on Clamperl. Fortunately, Clamperl has moves that don’t involve transforming, and that have more PP. Still, the same template of a bunch of Guard Split Shuckles works here, with the exception that this time they should be focused on Special Defense, not Defense.

Special Attack is the relative laggard here. This mainly draws from the fact that Power Trick only exchanges the physical stats, not the special ones, and there is no special equivalent at all (but Power Split does exchange both attacking stats regardless). This means there’s no way to get a 613 or 614 into this column as the raw stat; the best you can use is 535 from Mega Mewtwo Y. Item-wise, the Light Ball works again here, or else Clamperl can use a different item called Deep Sea Tooth.

Now, Mewtwo doesn’t actually learn Power Split, but it does learn Mimic. This suggests that Mewtwo can be opposite of Pikachu, while the other half of the field can have two irrelevant Pokemon where one of them uses Power Split on the other. Then Mewtwo uses Mimic to learn Power Split, uses that move on Pikachu, then switches out and the cycle repeats (to include having to use Mimic again). It’s complicated, but as usual 9 is the magic number of loops to get Pikachu’s starting stat up to 534, one point less than what Mewtwo innately had after going mega, and both Power Split and Mimic have enough PP to allow that.

There’s nothing like Huge Power for the special side, but at least there is Plus/Minus. Either Plusle or Minun can use Entrainment to pass its ability onto Pikachu with ease, and then when both Pokemon on a side have one of the Plus or Minus abilities, they both get a 50% Special Attack boost. It’s better than nothing, and enough to lift Pikachu’sSpecial Attack to 6408.

Finally, we have Speed. This is the fastest one to set up, and also the one with some caveats to it if you’re just going for big numbers. Here the move worth building around is Speed Swap, which (contrary to the name) works nothing like Power Swap or Guard Swap, and doesn’t work quite like Power Split either: instead of adding up the two underlying numbers and averaging them into two equal parts, it simply exchanges those underlying numbers.

The reason I say “on paper” is that in this case, we know the game’s accounting is different, and that video itself serves as proof. Instead, what happens is there’s a hard speed limit (or two) imposed: any Pokemon that would have Speed greater than10,000gets limited to just that 10,000 figure, with anything extra being cut off. Furthermore, after that’s done (along with a possible extra step to account for the presence of Trick Room), any Pokemon whose Speed is at least8192gets 8192 subtracted for the purpose of turn order. Together, this means that any speed greater than 10,000 will be treated as if it was only 1808 (for turn order purposes, but not for Gyro Ball and Electro Ball). You can see this mechanic in the video, where Swoobat (whose speed at that point was only 2512) managed to go before the “really fast” Ditto on the final turn.

Under a reckoning that does respect those known limitations, the ideal speed would be 8191, but it is impossible to land directly on that number with any combination of multipliers (unless Trick Room is in effect). Instead, the best you can do is 8190, which represents a speed of 455 at +6, paralyzed, with the Quick Feet ability, a Choice Scarf, and Tailwind in effect.