Pokémon Brilliant Diamond and Shining Pearl have been updated to version 1.2.0 today by Nintendo. You can get the complete patch notes here.
This patch improved the functionality of the Union rooms They have been expanded to increase the maximum number of players. Other features that have been added include the Colosseum battle. Pokémon Trading and Battles has been modified to apply to some of the illicit Pokémon so they cannot be traded.
Pokémon Brilliant Diamond and Shining Pearl Update 1.2.0 Patch Notes
- Union Room functions have been expanded.
- The maximum number of players you can play with via local or internet communication in Union Rooms has been increased to eight. Also, by selecting Greeting or Capsule Decorations, you can show each other your Trainer Cards or Capsule Decorations.
- Additional Colosseum battle feature has been added.
- Enter the Colosseum on the 2nd floor of a Pokémon Center to battle with other players using custom rulesets.
- In the Colosseum, you can set rules, such as the number of Pokémon to send into battle as well as their levels, and play Single Battles, Double Battles, or Multi Battles via local or internet communication.
- Pokémon Trading and Battles
- Some Pokémon acquired via unintended methods or illicit modification now cannot be used in Link Trades or Link Battles.
- Fixed some issues for more pleasant gameplay.
