The information on the Trainer Card is shown to the other player in a text-based format, including its level, number of Pokédex entries, total play time, number of battles won and lost, number of trades, and the message set on the player's profile.

In the Generation III games, this is called Greetings.

Greet (Japanese: あいさつ Greet) allows each player to see the other's Trainer Card. In Pokémon Platinum, HeartGold, and SoulSilver, Rotom will revert to its normal form when the player enters the Union Room. Pokémon holding an e-Card Berry and Spiky-eared Pichu are not permitted to enter the room. In Pokémon FireRed, LeafGreen, and Emerald, the Union Room requires the Wireless Adapter to be attached to the Game Boy Advance to enter. In Brilliant Diamond and Shining Pearl, this can be changed by talking to the leftmost receptionist on the second floor of any Pokémon Center. In Black and White, this can be customized on the player's Trainer Card.

In HeartGold and SoulSilver, this can be changed by talking to the Ace Trainer in the Violet City Pokémon Center. In Diamond, Pearl, and Platinum, this can be changed by talking to the Psychic in the Oreburgh City Pokémon Center. While in the Union Room, every player is assigned a random Trainer class, such as Ace Trainer or Bug Catcher, to help differentiate between players.

Other Trainers appear in the Union Room as representations of nearby players who have also entered the room. Pokémon Brilliant Diamond and Shining Pearl.

Pokemon black union room patch