The Indigo Disk is the second part of the Hidden Treasure of Area Zero downloadable content for Pokémon Scarlet, developed by Game Freak and released in 2023 for Nintendo Switch and Nintendo Switch 2. Requiring completion of both the base game's ending and Part 1: The Teal Mask, this chapter transfers the player from Naranja Academy to Blueberry Academy, a recently founded sister institution with a strong emphasis on Pokémon battling. A distinctive feature of Blueberry Academy is its partially underwater structure, setting it apart from the long-established Naranja Academy. The player attends classes, interacts with the local student body, and engages in the school's battle-focused curriculum within this unusual environment. As a role-playing game with turn-based combat, the expansion continues the series' core mechanics while introducing a distinct new setting and school community.