National Dex My national doubles team i've Been working on for ~3 years!

[GodOfDoggos]

Ive worked with this team for around 3 years now[not counting pre-optimization/competetively], making changes, optimizing it, swapping in and out pokemon and lowkey feel like its still not good enough so decided to come to yall!

Actual Builds and Strategy

Talonflame

Talonflame @ Covert Cloak
Ability: Gale Wings
Tera Type: Fire
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Tailwind
- U-turn
- Brave Bird
- Flare Blitz

Talonflame is great, My main lead alongside whoever feels right from team preview, Flying being immune to swamperts earthquake is a big plus. First turn is normally tailwind to increase my entire teams speed, and galewings gets that near gaurenteed. Fake out was a threat for some time untill i eventually got Covert Cloak, which makes it an even better lead. U turn just for easy switching out, especially with that pesky 4x weakness, and just overall frailness. Brave bird and flare blitz are my stab of choice as i feel talon needs that extra damage as most turns it would just die to fast if its not an OHKO, althought the recoil does get rid of gale wings, but it doesnt seem to affect me that much. Although ive been thinking of how peliper might help my team with drizzle,(maybe also allowing mega swampert). and still having acess to tailwind

Hydreigon

Helena (Hydreigon) (F) @ Razor Claw
Ability: Levitate
Shiny: Yes
Tera Type: Fire
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Focus Energy
- Draco Meteor
- Dark Pulse
- Heat Wave

Hydreigon, my personal favorite pokemon, good Damage dealer, Quasi-Sweeper, and Momentum stopper, the crit build from focus energy an razor claw near gaurentees a crit; allowing me to ignore draco meteor's spatk lower, and any enemy defense set up that I was too stupid to expect. Dark pulse and draco are just stab, and heatwave and tera fire is to avoid death from fairy types, while doing good damage against them aswell, Also that ~20% burn chance is not taken for granted. Also levitate works perfect with dodging swamperts earthquake.

Swampert

BoFo (Swampert) (M) @ Leftovers
Ability: Torrent
Tera Type: Ground
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Flip Turn
- Protect
- Earthquake
- Ice Punch

Swampert, i usually play him as aggresive pivot just throwing him in get decent damage, get healed, and repeat, he has very good survivability. Only downside is the fact he is KNOWN for that 4x grass weakness, leading me to choose protect in hopes of his ally being able to one shot it, which near always works. And if not, flip turn away and outspeed with tailwind. Earthquake for stab and hitting both enemies, although poses a threat to my aggron and swampert. And ice punch for grass coverage. Also easily eradicates apposing dragonites and salamances, which if find surprisingly common.

Mega Aggron

Osmi (Aggron) (M) @ Aggronite
Ability: Sturdy
Tera Type: Steel
EVs: 252 HP / 252 Def / 4 SpD
Serious Nature
- Heavy Slam
- Body Press
- Protect
- Iron Defense

Mega aggron, Amazing defense, iron defense increasing that even more, (up to 2000 Def) Making him an impervious physical wall. And body press gives him the ability to steal pose a big threat to my enemy, near gaurenteeing death if i get a iron defense off. Protect can defend against any weakness that filter cant save him from, and heavy slam for fairy coverage,stab, and cuz hes just a fattie. Mainly weak to sacred sword and special attackers, and.... fire types mainly because swampert doesnt pair well with him, and ursaluna is quite slow, but even then protect ignores both of these; allowing him to live just a little bit longer. (also forgot to mention the immunity to toxic gives it extra longevity)

Gengar

Venomyst (Gengar) (F) @ Focus Sash
Ability: Cursed Body
Shiny: Yes
Tera Type: Poison
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Toxic
- Shadow Ball
- Sludge Bomb
- Focus Blast

Gengar, my main wall breaker, atleast she used to be? National dex doubles has me faced with a LOT of ubers, so its moved slightly away from her previous hex toxic build, to a more offensive build, doing really well from her high spA; but i kept toxic to still have some way of putting a timer on pokemon. Focus sash to give it atleast a turn of play cuz this kid DIES SO FAST I HATE HER. focus blast for steal types sludge bomb cant do anything against. and shadow ball and sludge bomb for good stab damage. Her Fighting immunity is also amazing to switch in from ursaluna if i know a fighting move is coming at it. And boy, cursed body seems to proc so much more on smogon, and i am NOT complaining.

Ursaluna

Luna (Ursaluna) (F) @ Flame Orb
Ability: Guts
Tera Type: Ground
EVs: 252 HP / 252 Atk / 4 Def
Serious Nature
- Facade
- Headlong Rush
- Swords Dance
- Play Rough

Ursaluna, my main sweeper, if there's no potential threat i like to swords dance for even more guaranteed death, But i've been playing her since Ursaring Flame orb was the only strat, and she still remains on my team as she proves her worth in most battle(ignoring my own stupidity) dont need to explain facade, headlong rush, while lowering her defense, still does amazing damage; eradicating any fire or poison threats on the field. And play rough as it serves the best coverage from my own experience. Though her being slow and weak to grass has gotten me in a good bit of trouble with her.
Side Notes

Ursaluna and Aggron run max speed iv regardless of the fact that they are my main choice to fight back against trick room, as i didn't see the need to sacrifice the extra 61 speed in tailwind,
Gengar and Ursaluna end up swapping quite a bit because they share Immunities to each other's weaknesses
Ursaluna favors super effective moves rather than swords dance
Aggron Favors attacking, only using iron defense if i can ensure its survival
[Added after the games] I have jack shit against water
I seem to consistently struggle against mono teams, and im unsure exactly why
Some of my games!
Win, 4-0
Win, 3-0
Win, 2-0
Win, 1-0 {send help what is this countdown}
Loss, 0-3
​

That is practically it, This is in-fact my first post so lemme know if i did any formatting wrong! All suggestions welcome, comments, even advice on strategies. Thanks!​

 

[Im999]

This team is very underpowered for the current power level of National Dex Doubles, However I respect the attempt to make use of Mega Aggron, as I have not been able to do it myself.

With Ursaluna and Mega Aggron, this team would work a lot better as a Semi-Room team, so I am suggesting:

Talonflame ---> Indeedee-F, who stops opposing priority moves, such as Fake Out or Prankster Taunt, can set up Trick Room, and can redirect attacks with Follow Me, so that Hydreigon, Ursaluna and Mega Aggron can set up

https://pokepast.es/68e9512e222b21da (Indeedee)

Swampert ---> Landorus-Therian, for the incredible ability Intimidate, for superior damage output, but also to keep an very survivable pivot that can click Earthquake next to Hydreigon or , or Rock Slide/Knock Off when not.

https://pokepast.es/0b1c32369001b864 (Landorus)

I would recommend giving Mega Aggron the Sassy nature, as it doesn't currently have one, as well as lowering it's speed IVs to 0.

Same with Ursaluna, Brave nature, 0 speed IVs work best.

Gengar ---> Sinistcha, maintains a Ghost-type pivot, but now has better survivability, an answer into Water types, Grassium Z for massive damage into a single target, can set up Trick Room, can redirect damage away from teammates who are setting up(Hydreigon, Ursaluna and Mega Aggron), and allow Landorus-Therian to fire off powerful Earthquakes, while not having to worry about its partner surviving them.

https://pokepast.es/cafd2b5d1ff2c3f1 (The final team)

For lead pairs, Landorus-Therian and Sinistcha will work fine most of the time, allowing you to get off massive spread damage, set up Trick Room, deal with Water-types, and remove items.