Go to your Android device's Settings > Security (or Privacy) and toggle on "Install from Unknown Sources" to allow the APK to install.
The original developer, Weihuoya, hosted releases on GitHub. free download dolphin emulator mmj
Look for the latest version listed under "Releases" (often labeled with a version number like v5.0-XXXXX MMJ). Go to your Android device's Settings > Security
Dolphin MMJ is a free, open-source project. Because it is a "fork" (a modified version), it is typically hosted on developer repositories rather than the Google Play Store. tap the downloaded APK
Open your "Downloads" folder, tap the downloaded APK, and follow the on-screen prompts to complete the installation. MMJ vs. Official Dolphin Emulator