Contrary to —Marill4Life—'s answer, I would like to ask about some changes in this team.
Overall, it's pretty OK and can get upto 1400 in ladder, however I suggest a few changes.
Mareanie
Mareanie @ Eviolite
Ability: Regenerator
Level: 5
EVs: 196 HP / 20 Def / 92 SpA / 180 SpD
Bold Nature
- Scald
- Knock Off
- Haze
- Recover
I asked in LC room for some basic advice, and from that I understand that Haze is a passive choice on it.
AGCL6 Swas: And why mareanie doesn't carry haze much?
+Roldski32: it doesn't beat every sweeper
AGCL6 Swas: And is sludge bomb a generally better option than it?
+Roldski32: yes
From this, I suppose that Haze is not much of a good choice on it.
Haze neutralizes Swords Dance Pawniard and Grookey, stops Shell Smash Shellder in its tracks, doesn’t allow Timburr to sweep with Bulk Up, and prevents Vullaby from getting too many Nasty Plots off.
Haze < Sludge Bomb. Sludge Bomb handles Grookey quite easily, Shellder is also hurt quite a lot especially considering its low Sp.Def.
Cheir: you generally want scald/sludge bomb/recover, so your last move is between knock off/toxic spikes/iron defense/haze/whatever other idea you have but either way, it becomes hard to justify the others over knock/tspikes
Hence, I don't recommend having non-Sludge Bomb and Haze on Mareanie.
I can show some calculations to prove this:
+2 236+ Atk Pawniard Knock Off (97.5 BP) vs. 196 HP / 20+ Def Eviolite Mareanie: 19-24 (79.1 - 100%) -- 81.3% chance to OHKO after Stealth Rock
+2 236 Atk Life Orb Grookey Grassy Glide vs. 196 HP / 20+ Def Eviolite Mareanie in Grassy Terrain: 21-25 (87.5 - 104.1%) -- guaranteed OHKO after Stealth Rock
Hence, even if you want Haze get rid of Knock Off for Sludge Bomb.
New set:
Mareanie @ Eviolite
Ability: Regenerator
Level: 5
Shiny: Yes
EVs: 196 HP / 20 Def / 92 SpA / 180 SpD
Bold Nature
IVs: 0 Atk
- Scald
- Haze
- Sludge Bomb
- Recover
Ferroseed
Ferroseed @ Eviolite
Ability: Iron Barbs
Level: 5
EVs: 36 Atk / 188 Def / 228 SpD / 36 Spe
Impish Nature
- Spikes
- Thunder Wave
- Bullet Seed
- Leech Seed
Consider Giga Drain over Bullet Seed. It allows you to damage Onix without activating Weak Armor.
Again, when I asked in LC room one of the decent players told why not to use Leech Seed:
Kipkluif: dont use leech seed in lc, low hp totals get rounded down which means you steal less hp
They recommended Knock Off over Leech Seed. It deals some damage while getting rid of Onix's Berry Juice after which you can Giga Drain it.
New set:
Ferroseed @ Eviolite
Ability: Iron Barbs
Level: 5
Shiny: Yes
EVs: 4 HP / 36 Atk / 188 Def / 4 SpA / 228 SpD / 36 Spe
Relaxed Nature
- Spikes
- Thunder Wave
- Knock Off
- Giga Drain
The -Spe nature is mostly fine, though.
Kipkluif: its fine
It means youre still slower than things after thunder waving them mostly
but its manageable
Timburr
Timburr @ Eviolite
Ability: Guts
Level: 5
EVs: 76 HP / 36 Atk / 156 Def / 236 SpD
Careful Nature
- Bulk Up
- Drain Punch
- Mach Punch
- Thunder Punch
Careful Nature < Maximum defense. While specially defensive works, a maximum attack set with rest in Defense to take a Brave Bird with Vullaby is much better, according to LC room.
Therefore, I suggest the EVs getting changed.
Timburr @ Eviolite
Ability: Guts
Level: 5
EVs: 76 HP / 196 Atk / 236 Def
Adamant Nature
- Bulk Up
- Drain Punch
- Mach Punch
- Thunder Punch
While Life Orb's a good choice, Meowth, Abra, Carvanha, etc. like it more than Timburr.
Rest set is fine.
Spritzee
Spritzee @ Eviolite
Ability: Aroma Veil
Level: 5
Shiny: Yes
EVs: 212 HP / 196 Def / 12 SpA / 76 SpD / 12 Spe
Bold Nature
- Moonblast
- Wish
- Protect
- Psychic
It's becoming a lot of passive now-a-days, I suggest getting a Onix or Pawniard as a flying-resist to the team, mostly for Vullaby.
kingbaruk: also needs a flying resist
Kipkluif: spritzee tends to be too passive nowadays.
onix maybe
its like that or pawniard if you want ti check vullaby
You also don't have a Stealth Rock setter, which is why I recommend one of them.
Onix @ Eviolite
Level: 5
Ability: Weak Armor
EVs: 236 Atk / 76 SpD / 196 Spe
Jolly Nature
- Earthquake
- Rock Blast
- Stealth Rock
- Explosion
This is a standard set with a bit of bulk in special defense along with Eviolite to handle Vullaby better. I chose this over Pawniard since it can handle Vullaby as well as resisting Heat Wave, which Pawniard doesn't. It's also your Stealth Rock setter.
Diglett
Diglett @ Focus Sash
Ability: Arena Trap
Level: 5
EVs: 236 Atk / 236 Spe
Jolly Nature
- Hone Claws
- Sucker Punch
- Earthquake
- Memento
Not sure if this sets work. In my opinion, it won't work, as I'm pretty sure no opponent gives you such chance.
Kipkluif: theres a few, air balloon to trap other diglett
eviolite to live abra psychic and mareanie scald
life orb to just deal more damage
set is usually quake final gambit sucker punch rockslide/beat up
I suggest a Beat Up Air Balloon set, since opposing Diglett can be pretty scary for your own Mareanie. Beat Up is a weird choice, but it OHKOes Abra and being a multi-hit move it bypasses Focus Sash. Abra is something you shouldn't underestimate. It can 2OHKO Vullaby, and hurt your team a lot. Hence, I suggest using this set:
Diglett @ Air Balloon
Ability: Arena Trap
Level: 5
EVs: 36 HP / 236 Atk / 236 Spe
Jolly Nature
- Earthquake
- Rock Slide
- Beat Up
- Sucker Punch
Earthquake is STAB. Rock Slide hits Vullaby hard. Sucker Punch for faster Scarfers while Beat Up as already told above for Abra. Air Balloon is weird, but it allows to deal with opposing Diglett.
Vullaby
Set is mostly fine, but I recommend Berry Juice and Defog. Stealth Rock really chips your team, hence you need a Defogger. Here's the standard set:
Vullaby @ Berry Juice
Ability: Weak Armor
Level: 5
EVs: 236 Atk / 76 Def / 196 Spe
Jolly Nature
- Brave Bird
- Knock Off
- U-turn
- Defog
This set is mostly for pivoting. The defense helps more than Sp.Def because you can take like Timburr and Mienfoo's fighting-STABs.
That's all, and pretty long. Sorry if it's boring to read.
Final team
Shout-outs to Cheir and Kipkluif for their incredible helping nature, I couldn't have rate this team without their advice!