This page lists the things that you can do after completing the main game in Pokémon Sun and Moon.

List of Post-Game Events

Here is a list of what you can do after becoming the Alola Champion, in no particular order.

Get Incinium Z, Decidium Z, or Primarium Z from Hau

Get a Lucky Egg and TM90 Substitute from Professor Kukui in the Pokémon Research Lab

Catch the four Tapu

Catch the Ultra Beasts

Go to the Battle Tree

Get Cosmog

Get Type: Null

Battle the Eeveelution Users

Battle Guzma

Battle Faba to get a Dubious Disc. He is in 1F of Aether Paradise. He has a level 61 Hypno, a level 61 Slowbro, a level 61 Raichu, a level 61 Alakazam, and a level 61 Bruxish. You get 14640 Pokédollars for winning. Afterward, Faba gives you a Dubious Disc, then he disappears.

Battle the Principal of the Trainers' School on Melemele Island to get a King's Rock. First you have to Battle Black Belt Duane on 3F. He has a level 55 Primeape and a level 56 Lucario. You get 1792 Pokédollars for winning. Afterward, you can go through the door that he was blocking and battle Principal Asuka. She has a level 57 Granbull, a level 57 Stoutland, and a level 57 Arcanine. You get 5472 Pokédollars for winning. Afterward, she gives you a King's Rock.

Get the Oval Charm

Get the Shiny Charm

Get the rest of the stamps in your Trainer Passport. To get all of them, you need to get the Shiny Charm, win 50 consecutive Single Battles, 50 consecutive Double Battles, and 50 consecutive Multi Battles in the Battle Tree, and upgrade your Poké Finder to level 5

Go into the Hano Grand Resort and talk to Kahili to get TM92 Trick Room

Go into the Po Town Pokémon Center and talk to the Grunts to buy a Skull Tank

Talk to the sightseer to the left of the Café in the Seafolk Village Pokémon Center. Sightseer Marcus has a level 55 Shiny Exeggcute. You get 3300 Pokédollars for winning. Afterward, Marcus gives you six Nuggets.

Go to Mahalo Trail (north of Iki Town on Melemele Island) and go to the north end of the plank bridge to find an Electric Seed

Go to Aether House in Route 15 and talk to the employees in the room on the right to get a Porygon and Up-Grade

Go to Route 8 to meet Colress near the Aether building. He gives you the Douse Drive, Shock Drive, Burn Drive, and Chill Drive. After that, he can be encountered at the Battle Tree

You can get a Sun Stone in Pokémon Sun if you have a Solrock, or a Moon Stone in Pokémon Moon if you have a Lunatone. Put the pokémon in your party, then go to Haina Desert, where you found the Zygarde Cell. You will find a bald man who has lost his memory. If the correct pokémon is in your party (Solrock in Pokémon Sun, Lunatone in Pokémon Moon), the man will give you a Sun Stone if you are playing Pokémon Sun or a Moon Stone if you are playing Pokémon Moon.

Challenge the Pokémon League again whenever you want

There Is No National Pokédex

In Pokémon Sun and Moon, there is no National Pokédex. There is no way to unlock a National Pokédex after completing the main game.