From Bulbapedia, the community-driven Pokémon encyclopedia.
The Union Room allows players the interact directly with other players. The other trainers appearing in the Union Room are nearby players who have also entered the room. The Union Room requires the Wireless Adapter be attached to enter.
Inside the Union Room, trainers may:
- Chat in a group of two to five trainers.
- View the Trainer Card of another trainer.
- Enter two Pokémon up to level 30 for one-on-one battle.
- Register a Pokémon for trade, or trade for a registered Pokémon.
A trainer must have at least two Pokémon to enter the Union Room. Pokémon holding an e-Card Berry may not enter the room.