This place as well as the Elite Four and Champion rooms of the Indigo League will first be available after a player has obtained all 8 gym badges of the Kanto region. However, the rooms to Elite Four and Champion of the Johto League will be blocked off until players earn themselves the 8 gym badges of the Johto region. Due to the importance of the battles that take place in the Indigo Plateau, a Pokécenter and a Pokémart are available here.
There are 5 floors in each league, where each floor will only be unlocked after winning the battle that take place in the previous floors. Hence, to emerge victorious against the Pokémon League, a player must faced 5 different members consecutively, without healing at the Pokécenter. After winning, players will be teleported back to Pallet Town.