If you're looking for a "Pokémon Indigo League" game for Android, there isn't a single official app by that name. Instead, you're likely looking for Pokémon Añil (often translated as "Indigo") or the classic Pokémon FireRed/LeafGreen played via an emulator.
If you are looking for legitimate Pokémon apps related to the Indigo League, these are available on the Google Play Store Pokémon Uranium Pokemon Indigo League Game Download For Android
How to Download: Official links and English localizations are primarily hosted on community forums like the r/pokemonanil Reddit and PokeCommunity. If you're looking for a " Pokémon Indigo
Security: Emulators downloaded directly from the Google Play Store are strictly sandboxed and safe. Sourcing raw APK files from random search results is highly discouraged. Pokemon Indigo League Game Download For Android