Mega Barbaracle / Hisuian Zoroark / Weavile

Synergy

Mega Barbaracle is the primary win condition, using Shell Smash to set up sweeps. Weavile and Incineroar provide dual Fake Out support to give Barbaracle a free Shell Smash turn, while Hisuian Zoroark disguises itself as Barbaracle using Illusion to bait Fighting-type attacks and Fake Outs into a Ghost-type immune target. Sinistcha offers Rage Powder redirection, Life Dew healing, and Trick Room as a backup mode.

Win Conditions

Set up Shell Smash with Mega Barbaracle behind Fake Out support from Weavile or Incineroar, then sweep with boosted Rock Slide and Close Combat. Alternatively, lead Hisuian Zoroark disguised as Barbaracle to catch opponents with surprise Ghost-type immunities and early knockouts.

Lead Options

Weavile + Mega Barbaracle, Weavile + Hisuian Zoroark, Hisuian Zoroark + Floette-Eternal, Incineroar + Mega Barbaracle

Threats

Redirection users (Sinistcha, Clefable) that draw away Close Combat; Wide Guard blocking Rock Slide; Intimidate, Reflect, and burns reducing damage output after Shell Smash; priority moves finishing off Barbaracle after it has taken Shell Smash defense drops; well-played Fairy-types if Gholdengo/Floette faints early; opposing Tailwind outpacing Barbaracle before it sets up