Additional move options: Defog, Ominous Wind, Roost, Taunt
Additional item options: Lum Berry, Safety Goggles
Notes: Scarf Tailwind plus a wallbreaker can create revenge sweep situations if Chatot is immediately KO'd after.
Sleep Talk lets choice sets keep functioning after being hit by Smeargle's Spore, although it's a risky option reserved for teams weak to Spore.
Choice Specs can 2hko Probopass with Hidden Power Fighting, but Probopass is unlikely to stay in to take the second hit.
Nasty Plot Normalium can bluff Scarf or Specs very effectively if using U-Turn.
Nasty Plot Hidden Power Fighting does not OHKO SpD Probopass even after Rocks and Golem has Sturdy, so one must be sure to weaken them first.
30 HP IVs makes Chatot's HP divisible by 4, meaning that it doesn't have to go to 1 HP to activate Salac Berry, and activates it one turn sooner.
Chatot could also use a Safety Goggles Defog set to fight off Smeargle.