Downloading a "ready-to-play" APK of a copyrighted Nintendo game is piracy. Nintendo is extremely aggressive about protecting its intellectual property. Downloading these files exposes you to legal risks and supports unethical distribution of stolen software.
If you want to play Pokémon games on Android, here are your legitimate options:
If you own the game and wish to emulate it on your Android phone, follow these requirements and steps: 1. Hardware Requirements
Como estás jugando en un emulador, el proceso es muy sencillo: