That button only works when it is held on. Tried it just some seconds ago with the Mic Test option in B&W. When I hold the button, the Jigglypuff does something. But if I release it, it stops.

Hmm. I think you are right to a certain degree.

Maybe he is using a pirated version of 2.4.0.0.a? Cause that is the most common pirate version and it didn't had support for Android 7.0's filesystem.

I think Pokémon Black and White (and Black and White 2 in consequence) have a Mic Test option to check the Microphone is working correctly. Try that. If the Mic works correctly, the Jigglypuff on the bottom screen will do something.

Luckily, DraStic is well known, so it will be easy to differenciate the real app from a knock-off.

Maybe the Microphone sensitivity is too low. Try increasing it a bit and tell me the results.

Maybe you touched something you shouldn't had?

Is there a folder named DraStic on your Google Drive? Because sometimes it doesn't create correctly. If there isn't, create a folder with that name and try again.

Try disabling them and using only in-game saves.

I'm running the current version, I've reinstalled, rebooted, cleared caches, and anything else I can think of. I am on a Samsung Galaxy 7 edge. I downloaded a rom and though the folder shows for the rom, when I click it the folder opens instead of running. I have another emulator that runs it fine,...