To play Pokémon Ultra Sun and Moon on Android, you cannot simply download an "APK" of the game itself. The game was officially released only for the Nintendo 3DS. To play it on your phone, you must use a 3DS Emulator and a separate ROM file of the game. 1. Choose a 3DS Emulator
The Official Release
The Correct Way: Play Pokémon Ultra Sun/Moon on Android via Emulation
If you want to play Pokémon Ultra Sun or Ultra Moon on your Android device, there is a legitimate and working method: Using a Nintendo 3DS emulator.
The short answer is that Pokémon Ultra Sun and Ultra Moon were never released for Android. These games are Nintendo 3DS exclusives. To play them on a mobile device, you must use a 3DS emulator like Citra and provide your own legally obtained game ROM. 🎮 The Truth About Android APKs
If you choose to download a ROM, here is what to look for:
Step 4: Performance Expectations on Android
Even on a flagship phone (e.g., Samsung Galaxy S23 Ultra, OnePlus 11), Pokémon Ultra Sun on Citra will not run perfectly. Expect: