Primordial Sea Swadloon was a meme Pdon counter last gen (Swadloon cuz Eviolite). It was bad then and is bad now.Here's a fun little set to wall and OHKO most pdon sets.
Leavanny @ Waterium Z
Ability: Flash Fire
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe
- Steam Eruption
- Thousand Waves / Milk Drink / Stealth Rock
Leavanny outspeeds all non-boosted pdons and can eat its stabs.
252 Atk Groudon-Primal Precipice Blades vs. 252 HP / 252 Def Leavanny: 57-67 (16.1 - 18.9%) -- possible 6HKO
It can fire off a hydro vortex for an ohko:
252 SpA Leavanny Hydro Vortex (185 BP) vs. 252 HP / 252+ SpD Groudon-Primal: 416-492 (102.9 - 121.7%) -- guaranteed OHKO
This set loses to mold breaker sets of course, and only really exists to neuter pdons.
(this is my first write-up on here, lmk what you think)
Phat Albert is right there are better pdon checks.