Here’s a positive, detailed review you can use or adapt for (I believe you meant version 14994, as 509494 doesn’t exist — MMJ’s last notable build is around 14994). If you have a specific version number in mind, let me know.
Despite its popularity, the MMJ build was controversial within the core Dolphin development team: dolphin emulator 509494 mmj apk
Installing Dolphin Emulator 509494 MMJ APK is relatively straightforward. Here's a step-by-step guide: Here’s a positive, detailed review you can use