Primarina uses Chesto Berry and Rest to build up Calm Mind without any status-condition worries, functioning as a recovery-based sweeper, while Floette adds firepower with the same Calm Mind axis. Hippowdon and Archaludon clear the front with Stealth Rock/Sandstorm. Since Rest resets Primarina's status, it stays remarkably unshaken even by Will-O-Wisp or Toxic pressure.
Primarina (Chesto Berry, Torrent): Sparkling Aria / Moonblast / Calm Mind / Rest. Safely stacks Calm Mind every turn thanks to the berry-and-Rest combo, growing into a late-game special ace.
Mega Floette (Flower Veil): Light of Ruin / Moonblast / Draining Kiss / Calm Mind. A secondary ace whose Calm Mind-boosted Fairy STAB provides pure closing power.
Hippowdon (Leftovers, Sand Stream): Earthquake / Yawn / Slack Off / Protect. Forces switches with a Yawn cycle while supporting the team with Sandstorm.
Mega Delphox (Blaze): Mystical Fire / Psychic / Grass Knot / Encore. Encore locks down the opponent's setup before pushing through with a firepower move as the blocker.
Kingambit (Black Glasses, Supreme Overlord): Kowtow Cleave / Iron Head / Sucker Punch / Swords Dance. Sets up Swords Dance before finishing with Kowtow Cleave, the team's physical closer.
Archaludon (Sitrus Berry, Stamina): Flash Cannon / Foul Play / Thunder Wave / Stealth Rock. Sets Stealth Rock while limiting the opponent's sweepers' mobility with Thunder Wave.