Using x1 Exp share on another party member and they will get 2k exp each. [Go to the last entrance to Victory Road, so exit from the Pokemon League. I find that the Durant hordes there are a bit higher level than the ones on lower levels of the cave] The Elite Four for this ...
Use Sweet Scent to summon hordes and gain up to 10 EVs per horde for each Pokémon in your party holding an Exp. Share, or up to 20 EVs if holding a Training Link (available in the Gift Shop). Nature plays a more significant role than IVs when optimizing stats for PvP. For most te...