What are the World Championships Rules?
The World Championships Rules are a digital copy of the battle rules used in all official tournament matches of the Pokémon Video Game World Championship Series, that can be downloaded to your Nintendo 3DS system. By selecting these rules while setting up battles ingame, the game will automatically enforce the correct settings for an official tournament match, such as using the correct battle and turn time limits and preventing banned Pokémon and/or items from being used.
How do I download the rules?
You will need a Nintendo 3DS system, a copy of Pokémon Sun, Pokémon Moon, Pokémon Ultra Sun or Pokémon Moon and an internet connection. You must also have progressed far enough along the story so that you can access Festival Plaza. (In Pokémon Sun and Pokémon Moon, Festival Plaza is unlocked after you visit the Pokémon Center for the first time.)
The downloaded rules will be saved to your Nintendo 3DS’s SD card, so once they are downloaded any cartridge or digital copy of Pokémon Sun, Pokémon Moon, Pokémon Ultra Sun or Pokémon Moon on that Nintendo 3DS will be able to access them as long as the SD card is not removed.
Although the following demonstrates how you can download the rules on Pokémon Sun or Pokémon Moon, the steps are exactly the same if you have a copy of Pokémon Ultra Sun or Pokémon Ultra Moon.
Step 1: Enter Festival Plaza by selecting it from the game menu
Step 2: Press the ‘Battle’ button on the lower screen
Step 3: Press the ‘Download Rules’ button. The game will prompt you to connect to the internet.
Step 4: Select ‘Double Battle – World Championships Rules’ and press ‘Download’