Leave Exp Share On
Forget what other players are saying, there’s no shame in leaving Exp Share on in Pokemon Sun and Moon. You’ll obtain this item fairly early on in the game when you reach the Trainer’s School. By activating it, your main Pokemon will receive 100% of the experience gained from a fight, and the other five Pokemon in your team will get 50% of what you earned.
This is incredibly useful because it helps to cut down the amount of grinding you’ll have to do if you intend on raising a full party of strong Pokemon, and you’re the type of player who constantly swaps out Pokemon in their teams. However, I will say that if you’re planning on going through the entire game with a static team of six, there’s no harm in turning off Exp Share, as there won’t be as much grinding involved this way.