Online and wireless battles in the games remains exactly the same as before. While between Pokémon Ultra Sun & Ultra Moon games you can do and use anything, when you connect with players of Pokémon Sun & Moon, there are several restrictions. Essentially, you cannot use any of the new Pokémon, forms, new moves and new abilities in battle against these players. The game will inform you as you select your team whether or not it can be used.

The Battle Spot changes this up somewhat. In Free Battle, Pokémon Sun & Moon and Pokémon Ultra Sun & Ultra Moon run different matchmaking schemes so they will never encounter each other. In Rating Battle, they also run different schemes, with Pokémon Ultra Sun & Ultra Moon's scheme changing somewhat from the standard of Pokémon Sun & Moon

When you go to battle a player with Sun & Moon, it will tell you that you need to set the rules. If your team doesn't comply, it will offer you opportunities to remove items and will even tell you what's wrong.

Trading is the other one of the core aspects of Pokémon and also has several restrictions.Like battling, you won't be able to trade Pokémon who hold any of the new items over to Pokémon Sun & Moon, but you can trade them fine between various copies of Pokémon Ultra Sun & Ultra Moon. You also cannot trade Pokémon who have the new moves that are introduced in the new game.

At time of writing, it is not clear as to how the special features of Wonder Trade and the Global Trade Station will run, whether or not they run separate servers for the two games or if there will be restrictions.

Pokémon Bank is a piece of software that was introduced after Pokémon X & Y to store the various Pokémon obtained in the game. Pokémon Ultra Sun & Ultra Moon contains full compatibility with Pokémon Bank at launch.

As Pokémon Bank removes the items that are on the Pokémon before putting them in the Bank, compatibility isn't much of an issue. If you upload a Pokémon with a move that is not in Sun & Moon, it won't let you shift it down to Pokémon Sun & Moon.

However, while it has been updated to allow for all Pokémon with moves and capture data in Sun & Moon, at present it will not accept the new Totem Pokémon of Marowak, Togedemaru, Araquanid and Ribombee.