Best Shield Team: Sobble Chosen

Get a Zigzagoon on Route 2. Get a Budew on Route 4 and use it for Milo and Nessa. Get a Durant and a Ground type on Route 6. For Allister, use Durant for Mimikyu and Zigzagoon for everything else. For Opal, use your Ground type for her Mawile and Weezing and Durant for everything else. Get a Gurdurr or Falinks on Route 8. For Melony, use Durant for Frosmoth and your Fighting type for everything else. For Piers, use Durant for Malamar, your Ground type for Skuntank, and your Fighting type for everything else. For Raihan, use your Fighting for Gigalith, your Ground type for Duraludon, your Budew for Sandaconda and Durant for Flygon.