Mega Aerodactyl

Aerodactyl provides the team's speed control, and its strong stats outside Mega form mean it doesn't need to Mega Evolve every game to be useful. Jolly nature with maxed Attack and Speed guarantees Tailwind gets set before slower Trick Room teams can respond, and Rock Slide plus Dual Wingbeat give it spread damage once Tailwind is up. Wide Guard protects the team from spread moves during that same window. Unnerve denies berry activation from opposing Sitrus or Lum users on the turns that matter most, and Rock Slide gives the team a check to Flying-weak threats like Charizard Y.