Nature Swap (Now playable!)

[Chopin Alkaninoff]

While everyone thinks Kyurem-Black is a threat, people forgot Kyurem-N, a BL2 poke that can be faster than standard Jolly Kyurem-Black and still have a good offensive presence. It's bulky too.

Revive thread (Kyurem) @ Life Orb
Ability: Pressure
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Draco Meteor
- Ice Beam
- Earth Power
- Roost/Flash Cannon/Focus Blast

 

[TotalAsteroid]

This was probably mentioned, but...

Hell (Ninjask) @ Focus Sash / Life Orb
Ability: Speed Boost
EVs: 252 Atk / 4 SpD / 252 Spe
Timid Nature
- Swords Dance
- X-Scissor
- Aerial Ace
- Night Slash / Protect

I faced this once, and I has no idea how to even get around this thing. 1 SD and it destroys everything in its path, and speeds up creating a snowball effect. Timid is to make it so that Speed Boost can catch-up to a good speed at +1 and I would rather take it off 160 over 90. You still hit 377 Atk which is doubled by SD. It does have problems with coverage, preferring to pure power its way through walls. It's frail as hell, and doesn't want any attack, so it much switch-in. SR is also a problem.

 

[Mr155551]

I'm pretty sure timid boosts sp.attack why not jolly

 

[MK]

I'm pretty sure timid boosts sp.attack why not jolly

Lol

Timid would swap attack and speed, giving Ninjask 160 Attack. Jolly would only give it useless Special Attack.

 

[NoivernX70]

Celebi and mew are obv threats.
But seriously folks, either ban Kyu-B or allow Kyu-W

 

[acidphoenix]

The difference is that Kyurem-B can only become standard Kyurem-W. Kyurem-W become a 170/120 attacker, which means it can suddenly actually outspeed threats that aren't using their natures to boost their Speed, and thus kill without first being attacked.

and if KyuB wants speed, it has to use its bad physcial movepool.

 

[Reisuke]

Celebi and mew are obv threats.
But seriously folks, either ban Kyu-B or allow Kyu-W

We.l neither of them should be done. In this meta kyurem-B gets his Spa stat through the mecanics but kyurem-W has it from the beginning and thus can abuse this mechanic for something else

EDIT: ninja'ed

 

[TotalAsteroid]

Kyu-B should 100% be allowed, since it's basically only Kyu-W or a faster Kyu-B. Kyu-W can abuse Nature Swap to get 170/120 stats with an amazing move pool, creating basically a Hoopa-U case with insane stats

 

[Chopin Alkaninoff]

http://replay.pokemonshowdown.com/aqua-natureswap-2396

Some things doesn't work properly. I mean, a 165 Attack pixilate Frustration doesn't KO an uninvested Mantine, when it should be like this.

252+ Atk Pixilate Mega Gardevoir (165 Atk) Frustration vs. 0 HP / 0 Def Mantine: 382-450 (140.9 - 166%) -- guaranteed OHKO

In the replay, it does 89%, which means it still hasn't changed.

252+ Atk Pixilate Mega Gardevoir (85 Atk) Frustration vs. 0 HP / 0 Def Mantine: 240-283 (88.5 - 104.4%) -- 31.3% chance to OHKO

And also 140 SpA LO Mantine with Rain boosted Hydro Pump should've 1HKO'd.

252+ SpA Life Orb Mantine Hydro Pump vs. 0 HP / 0 SpD Mega Gardevoir in Rain: 313-370 (112.9 - 133.5%) -- guaranteed OHKO

It doesn't KO means I assume it still has base 80 SpA.

Also, Regice, which has 200 Speed, got outsped by pre-mega Swampert.

 

[BibarelThump]

Being a filthy theory-crafting user and never actually playing the metagames, just theorizing sets, how does Lonely Cloyster measure up? Mild? 180 goes a long way under a smash

 

[TotalAsteroid]

It's suspected and was previously banned

 

[Pipotchi]

http://replay.pokemonshowdown.com/aqua-natureswap-2396

Some things doesn't work properly. I mean, a 165 Attack pixilate Frustration doesn't KO an uninvested Mantine, when it should be like this.

252+ Atk Pixilate Mega Gardevoir (165 Atk) Frustration vs. 0 HP / 0 Def Mantine: 382-450 (140.9 - 166%) -- guaranteed OHKO

In the replay, it does 89%, which means it still hasn't changed.

252+ Atk Pixilate Mega Gardevoir (85 Atk) Frustration vs. 0 HP / 0 Def Mantine: 240-283 (88.5 - 104.4%) -- 31.3% chance to OHKO

And also 140 SpA LO Mantine with Rain boosted Hydro Pump should've 1HKO'd.

252+ SpA Life Orb Mantine Hydro Pump vs. 0 HP / 0 SpD Mega Gardevoir in Rain: 313-370 (112.9 - 133.5%) -- guaranteed OHKO

It doesn't KO means I assume it still has base 80 SpA.

Also, Regice, which has 200 Speed, got outsped by pre-mega Swampert.

chuun doesnt have time to find the bugs, so i will try and look for other coders who can help me out. will update the thread when the code gets fixed!

regarding lonely cloyster, its an absolute monster and i got swept incredibly easily in one of my matches against it- although i can see the arguments for it struggling to set up (even though there are some very passive tanks here such as chansey). if/when the code gets fixed and the meta sees some play without bugs, we can see how powerful it really is :]

 

[JBC]

This seems like an interesting metagame, I'll try it out sometime :)

 

[TotalAsteroid]

Has this been recoded?

 

[Ghoul King]

Tagging Pikachuun, as the Nature Swap code still isn't working consistently. Speed tiers and damage are inconsistent, seems to mostly be a problem after switches.

 

[nv]

Ok I really wanted to bump this OM as it is criminally underrated and I want to eventually take over this OM so I decided to update the OP while also providing a couple interesting threats that would work within (almost) every nature.

Updated OP

Approved by EG and TI

Nature Swap​

Have you ever wondered what would happen if Chansey had more Defense or if Scizor could abuse Hidden Power with its Attack stat? Here in Nature Swap, all this and more is possible just by using a particular nature to swap a Pokemon's stats.

Rules:

Mechanic: A Pokemon's base stats are swapped based on their nature.
Clauses: OU Clauses
Bans: OU Banlist along with the following:

Talonflame

Strategy:

In Nature Swap, a Pokemon's base stats are swapped based on their nature. For example, a Chansey with a Relaxed nature will have its Speed stat and Defense stat swapped, meaning it how has a base 5 Speed stat and a base 50 Defense stat. On top of this, the Bold nature will also boost the new Defense stat by 10% and lower the new Attack stat by 10% as it normally would. While Hardy, Docile, Serious, Bashful, and Quirky natures are never used in competitive play as they don't give any advantage over any boosting nature, these neutral natures can now be beneficial as these natures don't switch a Pokemon's stats.

Q&A:

Q: How does Mega Evolution boosts work?
A: TBD

More to come!

Resources:

Note that ALL natures of active Pokemon are always visible. This is to maintain the ability to offensively or defensively react to your opponent who could be physically/specially offensively inclined or physically/specially defensively inclined.

Threats
List is only based on OU-tiered Pokemon

Hide

Lonely

Gliscor @ Toxic Orb
Ability: Poison Heal
EVs: 252 Atk / 4 SpD / 252 Spe OR 244 HP / 252 Atk / 12 Spe
Lonely Nature
- Swords Dance
- Earthquake
- Knock Off
- Roost

With a new base 125 Atk, Gliscor can become a powerful stallbreaker with Earthquake and Knock Off hitting very hard. Access to reliable recovery, 2, weaknesses, and Poison Heal all mean that Gliscor will be hard to take down.

Zygarde @ Life Orb / Lum Berry
Ability: Aura Break
EVs: 252 Atk / 4 SpD / 252 Spe
Lonely Nature
- Dragon Dance
- Earthquake
- Outrage
- Stone Edge

Now being able to have a higher Attack stat and great neutral coverage in just its STABs means that it is definitely a threat in this metagame. Unfortunately, Zygarde will have to get +1 in Speed to outspeed relevant unboosted Pokemon such as Timid Camerupt.

Brave

Hawlucha @ Sitrus Berry
Ability: Unburden
EVs: 12 HP / 252 Atk / 244 Spe
Brave Nature
- Substitute
- Swords Dance
- High Jump Kick
- Acrobatics

While this may seem like a weird change since Hawlucha loses Speed, it can somewhat negate this with its ability, Unburden. A Brave nature gives Hawlucha base 118 Attack, allowing it to be very powerful and potentially clean up once Unburden is activated.

Adamant

Keldeo @ Life Orb / Lum Berry
Ability: Justified
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Swords Dance
- Aqua Jet
- Close Combat
- Stone Edge / Poison Jab

SD Keldeo is a pretty prominent threat in Nature Swap thanks to it now making use of its ability plus its access to priority in the form of STAB Aqua Jet. Its coverage moves depends on what you want to hit, such as Azumarill or Gyarados, or what may pop up as major threats that Keldeo would need to cover in Nature Swap.

Latios @ Life Orb / Lum Berry
Ability: Levitate
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Dragon Dance
- Dragon Claw / Outrage
- Zen Headbutt / Earthquake
- Earthquake / Roost

Being able to have a base 130 Attack stat allows Latios to be able to use Dragon Dance effectively. Latios also has just what it needs to run a physical set despite missing out on a lot more type coverage. Earthquake coupled with its STABs allows it to nail Steel-types that resist both while it can use its Psychic STAB to break Fairies.

Altaria @ Altarianite
Ability: Natural Cure
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Dragon Dance
- Return
- Earthquake
- Roost
Thanks to Mega Altaria having an equal boost from its stone and as such equal Attack, Defense, and Special Attack stats, it can run its standard Dragon Dance set with ease, allowing a powerful threat from standard to carry over into Nature Swap.

Naughty

Azumarill @ Choice Band
Ability: Huge Power
EVs: 252 HP / 252 Atk / 4 Def OR 252 Atk / 4 Def / 252 Spe
Naughty Nature
- Aqua Jet
- Waterfall
- Play Rough
- Superpower / Knock Off

Azumarill can cut into its bulk to now have base 80 Attack backed by Huge Power and Choice Band, allowing to crush a lot of more Pokemon than before. Azumarill could even run a faster EV spread since it no longer has the special bulk to tank hits like it could before.

Bold

Can't find any :(

Relaxed

Chansey @ Eviolite
Ability: Natural Cure
EVs: 252 HP / 252 Def / 4 SpD
Relaxed Nature
- Stealth Rock
- Toxic / Thunder Wave
- Soft-Boiled
- Seismic Toss

Relaxed Chansey has no offensive presence, 5 speed and still despises knock off/being worn down, but has a majorly improved Defense stat. With every single Pokemon bound to become a huge offensive threat, Relaxed Chansey is going to be a staple for stall or more defensively inclined teams.

Impish

Charizard @ Charizardite X
Ability: Blaze
EVs: 248 HP / 252 Def / 4 Spe
Impish Nature
- Will-O-Wisp
- Flare Blitz
- Roost
- Earthquake

Bulky ZardX is a really cool set in standard and thanks to it now getting a stat increase from 111 to 130, it becomes an even better bulky attacker / "wall". I am pretty sure the EVs could be played with, but the meta itself hasn't really been able to develop like it should to decide on how much Speed a wall may need. Either way. ZardX can use its nice resistances to cripple a lot of the physical attackers that may pop up while still firing off powerful STAB Flare Blitzes and Roosting off any residual damage.

Landorus-Therian @ Leftovers
Ability: Intimidate
EVs: 252 HP / 252 Def / 4 SpD
Impish Nature
- Earthquake
- U-turn
- Stone Edge / Knock Off
- Stealth Rock

Being able to swap out its somewhat average base 90 Defense stat for its base 105 Special Attack stat makes defensive Lando-T even more of a tank than it is in standard play.

Lax

Can't find any :(

Modest

Kyurem-Black @ Life Orb / Leftovers
Ability: Teravolt
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Ice Beam
- Earth Power
- Draco Meteor / Substitute
- Roost

Essentially having the power of Kyurem-W, Kyurem-B no longer has to go mixed while using a defense lowering nature. Base 170 Special Attack is nothing to scoff at as even resists will most likely be taken down by Ice Beam + Earth Power. This may need to be looked into for a potential ban or at the very least a suspect since Kyurem-B can effectively run a Modest, Jolly, or even Timid nature with ease, making it very hard to take down while allowing it to play the role of a wallbreaker or cleaner.

Mild

Can't find any :(

Quiet

Serperior @ Leftovers
Ability: Contrary
EVs: 252 SpA / 4 SpD / 252 Spe
Quiet Nature
- Leaf Storm
- Dragon Pulse
- Hidden Power Fire
- Glare / Taunt / Giga Drain

Quiet Serperior becomes a very powerful stallbreaker thanks to it now having base 113 Special Attack and its decent support movepool. Sadly, a lot of Pokemon are going to outspeed Serperior now, but it can still serve a use with decent bulk despite its meh typing.

Rash

Can't find any :(

Calm

Can't find any :(

Gentle

Florges @ Leftovers
Ability: Flower Veil
EVs: 252 HP / 252 Def / 4 SpD
Gentle Nature
- Calm Mind / Wish
- Moonblast
- Synthesis / Protect
- Aromatherapy

Now sporting a massive base 154 Defense stat, Florges is the ultimate wall in Nature Swap. While it has a pretty subpar Special Defense, it can at least buff it up with Calm Mind while also still firing off powerful Moonblasts, making it a decent win condition for more balanced teams.

Clefable @ Leftovers
Ability: Magic Guard / Unaware
EVs: 248 HP / 252 Def / 8 SpA
Gentle Nature
- Calm Mind
- Moonblast
- Soft-Boiled / Moonlight
- Heal Bell / Thunder Wave / Flamethrower

With Clefable now having a beefed up Defense stat, it can become a really good win condition as it can still beef up its now weaker Special Defense stat. Clefable can effectively use this set with either one of its abilities as both serve different purposes for different teams, making Clefable a pretty nice glue for particular teams.

Sassy

Can't find any :(

Careful

Can't find any :(

Timid

Diancie @ Diancite
Ability: Clear Body
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Moonblast
- Earth Power
- Hidden Power Fire
- Protect

While Mega Diancie has to lose out on a Rock STAB move, unless you wanna use the underwhelming Ancient Power, Timid Mega Diancie can become a really powerful late-game cleaner with great neutral coverage in Moonblast and Earth Power. Hidden Power Fire nets Diancie the best coverage to nails Steel-types that are hit neutrally by Earth Power.

Volcanion @ Choice Specs
Ability: Water Absorb
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Steam Eruption
- Fire Blast
- Sludge Bomb / Hidden Power Ice
- Earth Power / Hidden Power Ice

Volcanion being able to make use of its unused base 110 Attack stat by swapping it with his less-than-stellar base 70 Speed stat means it can become a very potent wallbreaker backed by great bulk.

Hasty

Bisharp @ Life Orb / Lum Berry
Ability: Defiant
EVs: 252 Atk / 4 SpD / 252 Spe
Hasty Nature
- Knock Off
- Swords Dance
- Iron Head
- Sucker Punch

Being able to have a better Speed tier allows Bisharp to threaten slower teams with ease while still having access to powerful STAB priority.

Magnezone @ Choice Scarf
Ability: Magnet Pull
EVs: 4 Def / 252 SpA / 252 Spe
Hasty Nature
- Volt Switch
- Hidden Power Fire
- Flash Cannon
- Thunderbolt

Now sporting a base 115 Speed stat, Magnezone can become an excellent momentum grabber and revenge killer backed by good resistances and an immunity to take advantage of despite its new subpar 70/70/90 bulk.

Metagross @ Metagrossite
Ability: Clear Body
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Meteor Mash
- Zen Headbutt / Thunder Punch
- Hammer Arm
- Ice Punch / Bullet Punch / Pursuit

Mega Metagross gets a massive Speed boost upon Mega Evolving which allows it to be a lot faster than most of the faster threats in Nature Swap. It also gains a power boost thanks to its Mega ability, Tough Claws, leaving the opponent to find a resist or an answer to this powerful and fast threat.

Jolly

Kyurem-Black @ Leftovers / Life Orb
Ability: Teravolt
EVs: 252 SpA / 4 SpD / 252 Spe
Jolly Nature
- Substitute / Roost
- Dragon Claw / Outrage
- Fusion Bolt
- Iron Head

This variant of Kyurem-Black can abuse its new base 120 Speed to become a powerful wallbreaker with the ability to outspeed even some of the faster threats that are bound to be around in Nature Swap.

Landorus-Therian @ Choice Scarf
Ability: Intimidate
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Earthquake
- Stone Edge
- Knock Off
- U-turn

Basically this is the standard OU Choice Scarf set but with a better Speed tier now as it has base 105 Speed instead of not-so-amazing base 91 Speed.

Naive

Gardevoir @ Gardevoirite
Ability: Trace
EVs: 4 Def / 252 SpA / 252 Spe
Naive Nature
- Hyper Voice
- Psyshock
- Focus Blast
- Will-O-Wisp / Taunt / Calm Mind

Mega Gardevoir gaining a better Speed tier with its access to a wide movepool allows it to custom tailor itself to its team. Sadly, Mega Gardevoir becomes even frailer than before losing its decent Special Defense stat so it has to be careful of actually switching in and should probably just stick to revenge killing.

Hardy / Docile / Serious /Bashful / Quirky

Weavile @ Life Orb
Ability: Pressure
EVs: 252 Atk / 4 Def / 252 Spe
Serious Nature
- Knock Off
- Icicle Crash
- Ice Shard
- Low Kick / Poison Jab / Pursuit

One of the most intriguing things about Nature Swap is while there are all these Pokemon gaining better bulk or better Speed tiers, there are Pokemon that already have good stat spreads and as such don't need to, or rather want to, swap their stats. This rings true for Weavile who has an impressive base 125 Speed and base 120 Attack. Weavile is still just as powerful as it is in standard since its "standard" nature boosts its Speed rather than its Attack anyways.

I only listed some Pokemon that would benefit from this change, but I am pretty sure there are plenty of Pokemon that are bound to appreciate from this new change and I wanna see what you guys have found :)

 

[Stocke]

(wall of sets)

If you do end up reviving this, would it be an acceptable change to make to change the meta's main mechanic so that natures only swap two stats of choice rather than both swap the stats and apply the 10% boosts and drops as they normally do? The reason I'm suggesting this is because it seems to me like there are many Pokémon (haven't read your entire post yet, but a good example of this is the Gliscor near the top of the post) that would prefer to have two of their stats swapped but can't really afford to take a 10% hit to either of them as they're both important to the role the Pokémon plays. This would make the natures that affect the same two stats (Adamant vs. Modest, as an example) redundant over each other, however, and judging by the fact that it was included in the ruleset to begin with changing it might be against the original creator's concept for the meta. Feel free to contribute your thoughts on this if you have any.

 

[Chopin Alkaninoff]

I also think this is an underrated meta (I said so in the interview). So I want to revive this and to start with, I'll fill the possible sets for the list of Natures that nv can't find. Keep in mind that this is from lower tiers.

Mild

Cobalion @ Choice Scarf/Specs
Ability: Justified
EVs: 4 HP / 252 SpA / 252 Spe
Mild Nature
- Focus Blast
- Flash Cannon
- Volt Switch
- Hidden Power Fire

Cobalion is actually blessed by a good switching move in Volt Switch, but can't really utilize it effectively because it has kinda average SpA. Now it gains 129 SpA to use Volt Switch and the dual STABs it has.

Bold

Salamence @ Leftovers/Rocky Helmet
Ability: Intimidate
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
- Defog
- Draco Meteor
- Wish/Roost
- Toxic/Fire Blast

Three great things that Salamence have: Wish, high offenses and Intimidate. When you swap the Attack and Defense, you get a Defensive behemoth with 135 Defensive stats AND Intimidate. Unlike Landorus T (which also have high Attack and Intimidate), Salamence actually have recovery and a STAB Draco Meteor coming off of it's base 110 SpA, which is not bad at all. Oh, and it also have Defog.

Rash

Dragalge @ Choice Specs
Ability: Adaptability
EVs: 252 HP / 252 SpA / 4 Def (for Rash) or 4 HP / 252 SpA / 252 Spe (for Naive)
Rash/Naive Nature
- Draco Meteor
- Sludge Wave
- Thunderbolt
- Focus Blast

This mon also has two possible sets. With Rash, you become an INSANELY powerful wallbreaker with 123 SpA and Adaptability firing off Draco Meteors. With Naive, you become a fast 123 Speed mon that still does a great damage. Another possibilty would be a slow wallbreaker with Band Naughty with Gunk Shot and Outrage as STAB moves. Because it can run three sets, it's pretty versatile and pretty dangerous because all of the sets hits hard.

 

[FINITOOOO]

Posting here because Chopin Alkaninoff has been hyping this meta in the OM chat.

This meta is super hype though! I could see Dragonite switching speed and special attack in order to outspeed more at wants to at +1. This meta sounds very offensive, so I'm going to try to think of some more defensive switch-ins (even though I hate stall, but without stall then offense wouldn't be so rewarding imo).

Chansey - can switch its defense and special attack to become way more bulky than before.

Amoonguss - can swap its defense and attack in order to get a stronger foul play and become more bulky in the process.

Tangrowth - Can definitely run an Assault Vest set and switch its attack and special defense! Yes you lose physical attacking power but you still have great special attack and can wall a lot more!

Mew - .... Nah this thing doesn't gain anything from this meta (lolmew)

To be honest I'm not really a defensive player, so that's the best I could come up with. I can definitely see Kyurem-B, bulky Lando-T, Serperior, and Mega Latios being huge threats though.

 

[yoman5]

Chansey can swap its defense and speed and do this:

252+ Atk Life Orb Teravolt Kyurem-B Outrage vs. 4 HP / 252+ Def Eviolite Chansey: 247-292 (38.4 - 45.4%) -- guaranteed 3HKO
(regular 170 attack kyub, not even possible to be adamant in this meta, but calcd for the sake of argument)
252+ SpA Choice Specs Teravolt Kyurem-B Draco Meteor vs. 4 HP / 252 SpD Eviolite Chansey: 219-258 (34.1 - 40.1%) -- guaranteed 3HKO
(170 spa specs kyurem)

I feel like it ought to get a ban.

 

[Chopin Alkaninoff]

At first I kinda opposed to it but after thinking for a while, I feel like what Stocke suggested (removing the +/- 10% nature boost) makes the meta better. If you apply the +/- 10% boost, ALL sweepers that are NOT in +Speed Nature is at a very disadvantageous position as the +10% Speed boost makes a HUGE difference (Cobalion, which has 108 Speed, got outspeed by a 95 base Speed with a +Speed Nature, which SIGNIFICANTLY lowers it's viability as it's basically outsped by everything with an average 100 Speed or more). By removing this, no sweepers will be at disadvantage just because of the necessity of +Speed Nature and I think that's a good thing.

Edit: Also Shell Smash users is now the meta since most of them now gain significant amount of Speed to outspeed everything after +2 while still having decent offenses (look at Jolly Carracosta, Naive Omastar, Naive Crustle, Naive Barbaracle, Timid Gorebyss, Naive/Jolly Huntail).

 

[drampa's grandpa]

So nv already posted about Diancie, but it was in a wall of other things and I think it warrants a little more attention.

Diancie-Mega @ Diancite
Ability: Magic Bounce
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Moonblast
- Earth Power
- Calm Mind / Ancientpower / Hidden Power Rock / Hidden Power Fire
- Protect

This thing is blazingly fast, outspeeding almost everything after mega evolving and having an amazing ability, good offensive coverage and stats, and crying when it runs into either Skarmory or Charizard or whatever is relevant here.

EDIT:

I like Chopin's idea, not least because it makes Diancie even more incredibly OP (full disclosure, I knew Chopin was gonna post that idea, and posted my Diancie with that in mind).

Diancie-Mega @ Diancite
Ability: Magic Bounce
EVs: 252 SpA / 4 SpD / 252 Spe
Hardy Nature
IVs: 1 Atk / 30 Def / 30 SpD / 30 Spe
- Moonblast
- Earth Power
- Calm Mind
- Hidden Power [Rock]

Diancie-Mega @ Diancite
Ability: Magic Bounce
EVs: 252 HP / 252 Def / 4 SpA
Hardy Nature
IVs: 0 Atk
- Moonblast
- Rest
- Calm Mind
- Sleep Talk

Stats (Possibly. Can we get the decision on the mega evolution mechanics): 160 / 50 / 110 / 160 / 110 / 110

160 / 110 / 110 bulk, incredibly high attack power as always, great ability, good speed...

252 Atk Choice Band Huge Power Azumarill Waterfall vs. 252 HP / 252 Def Mega Diancie: 420-494 (80.1 - 94.2%) -- guaranteed 2HKO

It isn't killed by choice band 80 attack Azumarill's Waterfall, a super effective base 80 STAB move off of over 750 effective attack. This isn't meant to say you're beating Azumarill by any means, but merely to be an indication of the ridiculous bulk it gains. The only thing Diancie loses by doing this too is Diamond Storm.

Stats (possibly... can we get a decision on Mega evolution mechanics.): 160 / 50 / 110 / 160 / 110 / 110
Stats (possibly... can we get a decision on Mega evolution mechanics.): 160 / 50 / 110 / 160 / 110 / 110

EDIT EDIT:

Blissey (F) @ Choice Band / Choice Scarf
Ability: Serene Grace
EVs: 252 Atk / 4 Def / 252 Spe
Quirky Nature
- Headbutt
- Body Slam
- Rock Slide
- Thunder

Team Blissey, blasting off at the speed of light, surrender now or prepare to fight!

 

[Chopin Alkaninoff]

Because I think it's kind of a shame that HP aren't affected, what if we use the 5 neutral Natures to swap HP and Atk/Def/SpA/Spd/Spe? That'll make the meta more interesting I think. So it'll become:

Hardy: swap HP and Attack
Docile: swap HP and Defense
Serious: swap HP and Special Attack
Bashful: swap HP and Special Defense
Quirky: swap HP and Speed

The issue would be "what if my mons have already perfectly good stats that doesn't need to be changed? like Keldeo, Weavile or Cresselia?" Well surely the stats that doesn't need to be changed are the only important ones. The solution? Swap the unimportant stats (in case of Keldeo, just swap the Def and SpD or Cresselia Atk and SpA or Speed).

I'm pretty sure there are no mons that doesn't have unimportant stats or a stats so perfect that it doesn't benefit from any stat swaps (except probably mons with 100 base across the board like Mew). So I think this change won't be a problem.

 

[Fissure]

So like a regenerator team of Calm Tangrowth, Calm Alomomola/ Impish Slowking/ Careful Slowbro

Or a stall team with like relaxed chansey, timid heatran, Impish Vaporeon, Impish nature Clefable, Calm Sableye (Hardy nature if mega), and a hazard remover of your choice. Stall team built around ideas in this http://www.smogon.com/smog/issue39/sableye-stalling-ou

 

[Chopin Alkaninoff]

I like Chopin's idea, not least because it makes Diancie even more incredibly OP (full disclosure, I knew Chopin was gonna post that idea, and posted my Diancie with that in mind).

Diancie-Mega @ Diancite
Ability: Magic Bounce
EVs: 252 SpA / 4 SpD / 252 Spe
Hardy Nature
IVs: 1 Atk / 30 Def / 30 SpD / 30 Spe
- Moonblast
- Earth Power
- Calm Mind
- Hidden Power [Rock]

Diancie-Mega @ Diancite
Ability: Magic Bounce
EVs: 252 HP / 252 Def / 4 SpA
Hardy Nature
IVs: 0 Atk
- Moonblast
- Rest
- Calm Mind
- Sleep Talk

Stats (Possibly. Can we get the decision on the mega evolution mechanics): 160 / 50 / 110 / 160 / 110 / 110

160 / 110 / 110 bulk, incredibly high attack power as always, great ability, good speed...

252 Atk Choice Band Huge Power Azumarill Waterfall vs. 252 HP / 252 Def Mega Diancie: 420-494 (80.1 - 94.2%) -- guaranteed 2HKO

It isn't killed by choice band 80 attack Azumarill's Waterfall, a super effective base 80 STAB move off of over 750 effective attack. This isn't meant to say you're beating Azumarill by any means, but merely to be an indication of the ridiculous bulk it gains. The only thing Diancie loses by doing this too is Diamond Storm.

Stats (possibly... can we get a decision on Mega evolution mechanics.): 160 / 50 / 110 / 160 / 110 / 110
Stats (possibly... can we get a decision on Mega evolution mechanics.): 160 / 50 / 110 / 160 / 110 / 110

Hardy Sableye

I don't know what will be the stat changing mechanic in Mega Evolutions yet but I don't think it's possible to change the base HP of mons upon mega evolving (Mega Evolutions in stat switch metagame uses base form's HP in every mega evolutions). So basically Mega Sableye's max base HP would be 75.