Location from pokemon-adventures-gsc by
The Pokémon League headquarters — where the Gym Leader exhibition tournament reveals the Masked Man's identity among their ranks, and where Ho-Oh and Lugia are unleashed.
The Indigo Plateau hosts the exhibition tournament between Kanto and Johto Gym Leaders — organized after suspicion falls that the Masked Man is one of them. The tournament serves as both investigation and spectacle: matches reveal fighting styles and allegiances while the organizers try to identify the villain. Carl and Sham seize the control room during the chaos, confronting Gold and Crystal. The Masked Man unleashes Ho-Oh and Lugia at the Plateau, causing massive destruction. But this is ultimately a diversion — the real plan unfolds at Ilex Forest. The Kanto team wins the tournament with four wins, three losses, and one draw.
A grand stadium complex atop a plateau between Kanto and Johto. Tournament arenas, battle halls, and administrative buildings. The grandest stage in both regions — and the perfect stage for the Masked Man's diversion.
Also known as: Indigo Plateau, Sekiei Plateau