Aerodactyl

Aerodactyl is this team's dedicated speed control, setting Tailwind to let bulkier attackers like Mega Charizard and Mega Garchomp act first. Jolly nature with Speed and Attack both maxed keeps it fast enough to get Tailwind up before slower leads can interrupt it, and Focus Sash guarantees that turn even under spread damage on the lead. Wide Guard shields the whole team from double-target moves during that setup turn. Rock Slide and Dual Wingbeat give it independent offense once Tailwind is live, so it isn't a pure one-turn support piece. Unnerve denies Sitrus Berry activation from opponents during those early, critical turns.