SubSeed set from Wolfe Glick's London team report in youtube:
Move 1: Horn Leech
Move 2: Leech Seed
Move 3: Substitute
Move 4: Protect
Ability: Grassy Surge
Item: Lum Berry
Adamant Nature
252 Hp / 36 Atk / 60 Def / 140 SpD / 20 Spe
On mobile, can't get link to youtube video, but it's easy to...