Never seen anyone try this before. I'm guessing there's a good reason, but best to put this out there in case anyone ever wonders again.
Double Battle:
Pidgeot@Persim Berry
Trait: Tangled Feet
(Physical Sweeper Moveset)
AND
(Insert bulky Pokemon that learns Swagger here)@Leftovers
Trait: Don't Care
(You know it: Splash!)
So what exactly happens here? Evasion is raised 20% while confused according to bulb and pd. Is that buff kept after the Persim Berry snaps Pidgeot out of confusion?